question_answer 1)
Addition of bromine to 1, 3-butadiene gives [CPMT 1987, 93]
A)
1, 2 addition product only done
clear
B)
1, 4 addition product only done
clear
C)
Both 1, 2 and 1, 4 addition products done
clear
D)
No reaction done
clear
View Solution play_arrow
question_answer 2)
When ethylene bromide is treated with \[Zn,\] we get [RPMT 1997]
A)
Alkane done
clear
B)
Alkene done
clear
C)
Alkyne done
clear
D)
All done
clear
View Solution play_arrow
question_answer 3)
Ethene when treated with \[B{{r}_{2}}\] in the presence of \[CC{{l}_{4}}\] which compound is formed [RPMT 1997; DCE 2001; KCET (Med.) 1999]
A)
1, 2-dibromoethane done
clear
B)
1-bromo-2-chloroethane done
clear
C)
Both A and B done
clear
D)
1, 1, 1-tribromoethane done
clear
View Solution play_arrow
question_answer 4)
In a reaction \[C{{H}_{2}}=C{{H}_{2}}\underset{acid}{\mathop{\xrightarrow{\text{Hypochlorous}}}}\,M\xrightarrow{R}\begin{matrix} C{{H}_{2}} & - & OH \\ |\,\,\,\,\,\,\, & {} & {} \\ C{{H}_{2}} & - & OH \\ \end{matrix}\] Where M = molecule; R = reagent M and R are [CBSE PMT 1997; CPMT 2001]
A)
\[C{{H}_{3}}C{{H}_{2}}Cl\] and NaOH done
clear
B)
\[C{{H}_{2}}Cl-C{{H}_{2}}OH\] and \[\text{aq}\text{. }NaHC{{O}_{3}}\] done
clear
C)
\[C{{H}_{3}}C{{H}_{2}}OH\] and HCl done
clear
D)
\[C{{H}_{2}}=C{{H}_{2}}\] and heat done
clear
View Solution play_arrow
question_answer 5)
Alkenes usually show which type of reaction [AIIMS 1999; MADT Bihar 1980]
A)
Addition done
clear
B)
Substitution done
clear
C)
Elimination done
clear
D)
Superposition done
clear
View Solution play_arrow
question_answer 6)
The propene reacts with HBr to form [AIIMS 1999; RPET 1999]
A)
Ethane done
clear
B)
Hexane done
clear
C)
1-bromo-propane done
clear
D)
2-bromo propane done
clear
View Solution play_arrow
question_answer 7)
Ethylene may be obtained by dehydration of which of the following with concentrated \[{{H}_{2}}S{{O}_{4}}\] at \[160-{{170}^{o}}C\] [RPET 1999]
A)
\[{{C}_{2}}{{H}_{5}}OH\] done
clear
B)
\[C{{H}_{3}}OH\] done
clear
C)
\[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH\] done
clear
D)
\[{{(C{{H}_{3}})}_{2}}CHC{{H}_{2}}OH\] done
clear
View Solution play_arrow
question_answer 8)
\[\begin{matrix} {{H}_{3}}C & {} & C{{H}_{3}} \\ {} & >C=C< & {} \\ {{H}_{3}}C & {} & C{{H}_{3}} \\ \end{matrix}\underset{KOH\,\text{(heat)}}{\mathop{\xrightarrow{X}}}\,\begin{matrix} C{{H}_{3}} & {} & C{{H}_{3}} \\ {} & >C=O+O=C< & {} \\ C{{H}_{3}} & {} & C{{H}_{3}} \\ \end{matrix}\] \[X\] in the above reaction is [CPMT 1985, 93]
A)
\[HN{{O}_{3}}\] done
clear
B)
\[{{O}_{2}}\] done
clear
C)
\[{{O}_{3}}\] done
clear
D)
\[KMn{{O}_{4}}\] done
clear
View Solution play_arrow
question_answer 9)
The disappearance of the characteristic purple colour of \[KMn{{O}_{4}}\] in its reaction with an alkene is the test for unsaturation. It is known as [CPMT 1989, 94; CBSE PMT 1990]
A)
Markownikoff's test done
clear
B)
Baeyer's test done
clear
C)
Wurtz's test done
clear
D)
Grignard test done
clear
View Solution play_arrow
question_answer 10)
A gas formed by the action of alcoholic KOH on ethyl iodide, decolourises alkaline\[KMn{{O}_{4}}\]. The gas is [KCET 2003]
A)
\[{{C}_{2}}{{H}_{6}}\] done
clear
B)
\[C{{H}_{4}}\] done
clear
C)
\[{{C}_{2}}{{H}_{2}}\] done
clear
D)
\[{{C}_{2}}{{H}_{4}}\] done
clear
View Solution play_arrow
question_answer 11)
\[C{{H}_{3}}-C{{H}_{2}}-Cl\xrightarrow{alc.KOH}A\], the product is [CPMT 2003]
A)
\[C{{H}_{3}}C{{H}_{2}}OK\] done
clear
B)
\[C{{H}_{3}}CHO\] done
clear
C)
\[C{{H}_{3}}C{{H}_{2}}OC{{H}_{2}}C{{H}_{3}}\] done
clear
D)
\[C{{H}_{2}}=C{{H}_{2}}\] done
clear
View Solution play_arrow
question_answer 12)
The final product formed when ethyl bromide is treated with excess of alcoholic KOH is [MP PET 1999]
A)
Ethylene done
clear
B)
Ethane done
clear
C)
Ethyne done
clear
D)
Vinyl bromide done
clear
View Solution play_arrow
question_answer 13)
Which of the following hydrocarbons cannot be obtained by Sabatier and Senderen's reaction
A)
\[C{{H}_{4}}\] done
clear
B)
\[{{C}_{2}}{{H}_{6}}\] done
clear
C)
\[{{C}_{3}}{{H}_{8}}\] done
clear
D)
All done
clear
View Solution play_arrow
question_answer 14)
When 3, 3-dimethyl-2-butanol is heated with \[{{H}_{2}}S{{O}_{4}}\] the major product obtained is [CBSE PMT 1995]
A)
cis and trans isomers of 2, 3-dimethyl-2-butene done
clear
B)
3, 3-dimethyl-1-butene done
clear
C)
2, 3-dimethyl-2-butene done
clear
D)
2, 3-dimethyl-1-butene done
clear
View Solution play_arrow
question_answer 15)
The intermediate during the addition of HCl to propene in the presence of peroxide is [IIT-JEE 1997]
A)
\[C{{H}_{3}}\overset{\bullet \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{CHC{{H}_{2}}}}\,Cl\] done
clear
B)
\[\overset{+\,\,\,\,\,}{\mathop{C{{H}_{3}}CHC{{H}_{3}}}}\,\] done
clear
C)
\[C{{H}_{3}}C{{H}_{2}}\overset{\bullet \,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{2}}}}\,\] done
clear
D)
\[C{{H}_{3}}C{{H}_{2}}\overset{+\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{2}}}}\,\] done
clear
View Solution play_arrow
question_answer 16)
\[C{{H}_{2}}=C{{H}_{2}}\underset{KOH/{{H}_{2}}O}{\mathop{\xrightarrow{KMn{{O}_{4}}}}}\,X\]. Product 'X' in above reaction is [RPMT 2003]
A)
Ethylene glycol done
clear
B)
Glucose done
clear
C)
Ethanol done
clear
D)
All of these done
clear
View Solution play_arrow
question_answer 17)
Which of the following compounds represents acrylonitrile [JIPMER 1997]
A)
Vinyl cyanide done
clear
B)
Cyanoethene done
clear
C)
Prop-2-ene nitrile done
clear
D)
All of them done
clear
View Solution play_arrow
question_answer 18)
When acetylene reacts with arsenic trichloride in the presence of anhydrous aluminium chloride, it produces [AFMC 1999]
A)
Lewisite done
clear
B)
b-chlorovinyl dichloroarisine done
clear
C)
Nitrobenzene done
clear
D)
Both A and B done
clear
View Solution play_arrow
question_answer 19)
Ozonolysis of which one of the following will give two molecules of acetaldehyde [Bihar MEE 1997; MP PET 2000]
A)
1-butene done
clear
B)
2-butene done
clear
C)
1-pentene done
clear
D)
2-pentene done
clear
E)
None of these done
clear
View Solution play_arrow
question_answer 20)
In which of the following, addition of \[HBr\] does not take place against Markownikoff's rule or Anti-Markownikoff addition of \[HBr\] is not observed for [IIT-JEE 1985; CBSE PMT 1994; MADT Bihar 1995; MP PMT 1999; AMU 2002]
A)
Propene done
clear
B)
But-1-ene done
clear
C)
But-2-ene done
clear
D)
Pent-2-ene done
clear
View Solution play_arrow
question_answer 21)
Which one of the following characteristics apply to both ethene and ethyne [NCERT 1990]
A)
Explode when mixed with chlorine done
clear
B)
Decolourise Baeyer's reagent giving brown precipitate done
clear
C)
Rapidly absorbed by cold conc. \[{{H}_{2}}S{{O}_{4}}\] done
clear
D)
Form white precipitate with silver nitrate solution done
clear
View Solution play_arrow
question_answer 22)
Which of the following has highest knocking property
A)
Aromatic hydrocarbons done
clear
B)
Olefins done
clear
C)
Branched chain paraffins done
clear
D)
Straight chain paraffins done
clear
View Solution play_arrow
question_answer 23)
Dilute aqueous \[KMn{{O}_{4}}\], at room temperature reacts with \[\text{ }R-CH=CH-R\]to give [Roorkee 1992]
A)
R - CHO done
clear
B)
R - COOH done
clear
C)
RCHOH - CHOHR done
clear
D)
\[C{{O}_{2}}+{{H}_{2}}O\] done
clear
View Solution play_arrow
question_answer 24)
Aqueous sulphuric acid reacts with 2-methyl-1-butene to give predominantly [Roorkee 1992]
A)
Isobutyl hydrogen sulphate done
clear
B)
2-methyl-2-butanol done
clear
C)
2-methyl-1-butanol done
clear
D)
Secondary butyl hydrogen sulphate done
clear
View Solution play_arrow
question_answer 25)
How can ethene be produced from ethanol [BHU 1996]
A)
By dehydrohalogenation done
clear
B)
By dehydrogenation done
clear
C)
By dehydration with conc. \[{{H}_{2}}S{{O}_{4}}\] at \[{{170}^{o}}C\] done
clear
D)
By reduction with hydrogen iodide done
clear
View Solution play_arrow
question_answer 26)
Baeyer's reagent is used in the laboratory for [CBSE PMT 1991, 92; AIIMS 1998; AFMC 1999]
A)
Detection of double bonds done
clear
B)
Detection of glucose done
clear
C)
Reduction done
clear
D)
Oxidation done
clear
View Solution play_arrow
question_answer 27)
Isopropyl alcohol is obtained by reacting which of the following alkenes with conc. \[{{H}_{2}}S{{O}_{4}}\] and \[{{H}_{2}}O\] [MP PMT 1999]
A)
Ethylene done
clear
B)
Propylene done
clear
C)
2-methyl propene done
clear
D)
Isoprene done
clear
View Solution play_arrow
question_answer 28)
Which of the following compound is produced when \[C{{H}_{2}}=CH-{{(C{{H}_{2}})}_{2}}COOH\] reacts with HBr in presence of peroxides [AIIMS 2000]
A)
\[C{{H}_{3}}CH{{(C{{H}_{2}})}_{5}}COOH\] done
clear
B)
\[BrC{{H}_{2}}C{{H}_{2}}{{(C{{H}_{2}})}_{5}}COOH\] done
clear
C)
\[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}{{(C{{H}_{2}})}_{5}}COOH\] done
clear
D)
\[C{{H}_{3}}C{{H}_{2}}BrC{{H}_{2}}C{{H}_{2}}COOH\] done
clear
View Solution play_arrow
question_answer 29)
One mole of each of the following alkenes is catalytically hydrogenated. The quantity of heat evolved will be the lowest in the case of [Roorkee 2000]
A)
1-butene done
clear
B)
Trans-2-butene done
clear
C)
Cis-2-butene done
clear
D)
1, 3-butadiene done
clear
View Solution play_arrow
question_answer 30)
Which of the following is not used to distinguish ethene from ethane [KCET (Med.) 2001; UPSEAT 2002; CBSE PMT 2002]
A)
Iodine in \[CC{{l}_{4}}\] done
clear
B)
Bromine in \[CC{{l}_{4}}\] done
clear
C)
Alkaline \[KMn{{O}_{4}}\] done
clear
D)
Ammonical \[C{{u}_{2}}C{{l}_{2}}\] done
clear
View Solution play_arrow
question_answer 31)
A hydrocarbon X adds on one mole of hydrogen to give another hydrocarbon and decolourised bromine water. X reacts with \[KMn{{O}_{4}}\]in presence of acid to give two moles of the same carboxylic acid. The structure of X is [JIPMER 2001]
A)
\[C{{H}_{2}}=CH-C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}\] done
clear
B)
\[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}-CH=CHC{{H}_{3}}\] done
clear
C)
\[C{{H}_{3}}C{{H}_{2}}CH=CHC{{H}_{2}}C{{H}_{3}}\] done
clear
D)
\[C{{H}_{3}}CH=CHC{{H}_{2}}C{{H}_{2}}C{{H}_{3}}\] done
clear
View Solution play_arrow
question_answer 32)
When 2-bromobutane reacts with alcoholic KOH, the reaction is called [KCET (Med.) 2001]
A)
Halogenation done
clear
B)
Hydrogenation done
clear
C)
Chlorination done
clear
D)
Dehydro-halogenation done
clear
View Solution play_arrow
question_answer 33)
1, 3-butadiene reacts with ethylene to form [BHU 2001]
A)
Benzene done
clear
B)
Cyclohexane done
clear
C)
Cyclohexene done
clear
D)
2, 3 dimethyl butane done
clear
View Solution play_arrow
question_answer 34)
Ethylene reacts with ozone gas to form the compound [UPSEAT 2001]
A)
\[HCHO\] done
clear
B)
\[{{C}_{2}}{{H}_{5}}OH\] done
clear
C)
\[O\,<\,\begin{matrix} \underset{|}{\mathop{C}}\,{{H}_{2}}-\underset{|}{\mathop{O}}\, \\ C{{H}_{2}}-O \\ \end{matrix}\] done
clear
D)
\[C{{H}_{3}}CHO\] done
clear
View Solution play_arrow
question_answer 35)
Oils are converted into fats by [Kerala (Med.) 2002]
A)
Hydration done
clear
B)
Decarboxylation done
clear
C)
Hydrogentation done
clear
D)
Dehydrogenation done
clear
E)
Hydrogenolysis done
clear
View Solution play_arrow
question_answer 36)
Which process converts olefins into parafins [MP PET 2002]
A)
Halogenation done
clear
B)
Dehydration done
clear
C)
Hydrogenation done
clear
D)
Hydrolysis done
clear
View Solution play_arrow
question_answer 37)
Of the following the formula which represents a saturated cyclic compound is [AMU 1983]
A)
\[{{C}_{3}}{{H}_{6}}\] done
clear
B)
\[{{C}_{3}}{{H}_{8}}\] done
clear
C)
\[{{C}_{8}}{{H}_{10}}\] done
clear
D)
\[{{C}_{8}}{{H}_{12}}\] done
clear
View Solution play_arrow
question_answer 38)
In a reaction, if half of the double bond is broken and two new bonds are formed, this is a case of [AMU 1983; NCERT 1978; CPMT 1983]
A)
Elimination done
clear
B)
Addition done
clear
C)
Displacement done
clear
D)
Rearrangement done
clear
View Solution play_arrow
question_answer 39)
Which of the following are formed on addition reaction of DCI with 3-methyl-1-butene [Roorkee 2000]
A)
\[C{{H}_{2}}DCHClCH{{(C{{H}_{3}})}_{2}}\] done
clear
B)
\[C{{H}_{2}}DC{{H}_{2}}CCl{{(C{{H}_{3}})}_{2}}\] done
clear
C)
\[C{{H}_{3}}CDClCH{{(C{{H}_{3}})}_{2}}\] done
clear
D)
\[ClC{{H}_{2}}CHDCH{{(C{{H}_{3}})}_{2}}\] done
clear
View Solution play_arrow
question_answer 40)
Major product of the following reaction is \[C{{H}_{3}}\underset{H}{\mathop{\underset{|}{\mathop{\overset{Br}{\mathop{\overset{|}{\mathop{-C-}}\,}}\,}}\,}}\,C{{H}_{2}}-C{{H}_{3}}+alco.\,KOH\to \] [MP PMT 1986]
A)
Butene-1 done
clear
B)
Butene-2 done
clear
C)
Butane done
clear
D)
Butyne-1 done
clear
View Solution play_arrow
question_answer 41)
Cyclopentene on treatment with alkaline \[KMn{{O}_{4}}\] gives [CPMT 1987]
A)
Cyclopentanol done
clear
B)
trans 1, 2-cyclopentanediol done
clear
C)
cis 1, 2-cyclopentanediol done
clear
D)
1 : 1 mixture of cis and trans 1, 2-cyclopentanediol done
clear
View Solution play_arrow
question_answer 42)
Which of the following is the most stable alkene [AIIMS 1998; KCET (Med.) 2000; CPMT 2003]
A)
\[{{R}_{2}}C=C{{R}_{2}}\] done
clear
B)
\[RCH=CHR\] done
clear
C)
\[RC{{H}_{2}}=C{{H}_{2}}R\] done
clear
D)
\[C{{H}_{2}}=C{{H}_{2}}\] done
clear
View Solution play_arrow
question_answer 43)
Ethene gives with acidic \[KMn{{O}_{4}}\] solution [MP PMT 1997]
A)
Ethylene glycol done
clear
B)
Ethylene oxide done
clear
C)
Formaldehyde done
clear
D)
Acetaldehyde done
clear
View Solution play_arrow
question_answer 44)
In paraffins, with the increasing molecular weight, it is found that [CPMT 1974]
A)
Freezing point decreases done
clear
B)
Boiling point decreases done
clear
C)
Boiling point increases done
clear
D)
Vapour pressure decreases done
clear
View Solution play_arrow
question_answer 45)
When alcoholic solution of ethylene dibromide is heated with granulated zinc, the compound formed is [CPMT 1990]
A)
Ethylene done
clear
B)
Ethyne done
clear
C)
Cyclobutane done
clear
D)
Butane done
clear
View Solution play_arrow
question_answer 46)
A gas formed by the action of alcoholic KOH on ethyl iodide, decolorises alkaline \[KMn{{O}_{4}}\] solution. The gas is [CPMT 1974, 91; MP PET 1985; IIT-JEE 1982]
A)
\[C{{H}_{4}}\] done
clear
B)
\[{{C}_{2}}{{H}_{6}}\] done
clear
C)
\[{{C}_{2}}{{H}_{4}}\] done
clear
D)
\[{{C}_{2}}{{H}_{2}}\] done
clear
View Solution play_arrow
question_answer 47)
Markownikoff's rule provides guidance of addition of HBr on [MNR 1994]
A)
\[C{{H}_{2}}=C{{H}_{2}}\] done
clear
B)
\[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{3}}\] done
clear
C)
\[C{{H}_{3}}CH=CHC{{H}_{3}}\] done
clear
D)
\[C{{H}_{2}}=CHBr\] done
clear
View Solution play_arrow
question_answer 48)
Ethyl bromide gives ethylene when reacted with [CPMT 1982, 93; RPET 2000; Pb. PMT 2001]
A)
Ethyl alcohol done
clear
B)
Dilute \[{{H}_{2}}S{{O}_{4}}\] done
clear
C)
Aqueous KOH done
clear
D)
Alcoholic KOH done
clear
View Solution play_arrow
question_answer 49)
Ethylene is prepared by the dehydration of [CPMT 1974, 79; DPMT 1985; BHU 1989]
A)
Ethyl alcohol done
clear
B)
Methyl alcohol done
clear
C)
Acetic acid done
clear
D)
Oxalic acid done
clear
View Solution play_arrow
question_answer 50)
Which reactions are most common in alkenes [Pb. CET 1989]
A)
Electrophilic substitution reactions done
clear
B)
Nucleophilic substitution reactions done
clear
C)
Electrophilic addition reactions done
clear
D)
Nucleophilic addition reactions done
clear
View Solution play_arrow
question_answer 51)
A mixture of 1-chloropropane and 2-chloropropane when treated with alcoholic KOH gives [NCERT 1990]
A)
1-propene done
clear
B)
2-propene done
clear
C)
Isopropylene done
clear
D)
All the three done
clear
View Solution play_arrow
question_answer 52)
The compound formed by passing ethylene gas into cold alkaline solution of \[KMn{{O}_{4}}\] is [NCERT 1974, 81; CPMT 1979, 86, 88; MP PET 1985, 95; AFMC 1998]
A)
Ethyl alcohol done
clear
B)
Acetaldehyde done
clear
C)
Acetic acid done
clear
D)
Ethylene glycol done
clear
View Solution play_arrow
question_answer 53)
A gas decolourised \[KMn{{O}_{4}}\] solution but gives no precipitate with ammoniacal cuprous chloride is or Which of the following gases does not give a precipitate with ammoniacal solution of silver nitrate but decolourizes \[KMn{{O}_{4}}\] (neutral or slightly alkaline) [NCERT 1974, 77; CPMT 1974, 77, 78; MP PMT 1996; MP PET 1996, 99]
A)
Ethane done
clear
B)
Methane done
clear
C)
Ethene done
clear
D)
Acetylene done
clear
View Solution play_arrow
question_answer 54)
A hydrocarbon reacts with hypochlorous acid to give 1-chloro-2-hydroxyethane. The hydrocarbon is [CBSE PMT 1989]
A)
Ethylene done
clear
B)
Methane done
clear
C)
Ethane done
clear
D)
Acetylene done
clear
View Solution play_arrow
question_answer 55)
When ethene is heated at \[{{400}^{o}}C\] under high pressure, the product is/are
A)
Carbon and \[{{H}_{2}}\] done
clear
B)
Polyethylene done
clear
C)
Acetylene and \[{{H}_{2}}\] done
clear
D)
None of these done
clear
View Solution play_arrow
question_answer 56)
Which decolorize aqueous bromine and gives white fumes of HCl on reaction with \[PC{{l}_{5}}\] [Pb. PMT 1999]
A)
\[C{{H}_{3}}COC{{H}_{2}}CH=C{{H}_{2}}\] done
clear
B)
\[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}\] done
clear
C)
\[C{{H}_{3}}CH=CHC{{H}_{2}}C{{H}_{2}}OH\] done
clear
D)
\[C{{H}_{3}}OC{{H}_{2}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}OH\] done
clear
View Solution play_arrow
question_answer 57)
During debromination of meso-dibromobutane, the major compound formed is [IIT-JEE 1997]
A)
n-butane done
clear
B)
1-butane done
clear
C)
cis-2-butene done
clear
D)
trans-2-butene done
clear
View Solution play_arrow
question_answer 58)
What product is formed when 1-chlorobutane react with alcoholic KOH [RPMT 2002]
A)
1-butene done
clear
B)
2-butene done
clear
C)
1-butanol done
clear
D)
2-butanol done
clear
View Solution play_arrow
question_answer 59)
The olefin which on ozonolysis gives \[C{{H}_{3}}C{{H}_{2}}CHO\] and \[C{{H}_{3}}CHO\] is [Roorkee 1992]
A)
1-butene done
clear
B)
2-butene done
clear
C)
1-pentene done
clear
D)
2-pentene done
clear
View Solution play_arrow
question_answer 60)
Bond length between carbon-carbon in ethylene molecule is [MP PET 1997]
A)
\[1.54\overset{\circ }{\mathop{\text{A}}}\,\] done
clear
B)
\[1.35\overset{\circ }{\mathop{\text{A}}}\,\] done
clear
C)
\[1.19\overset{\circ }{\mathop{\text{A}}}\,\] done
clear
D)
\[2.4\overset{\circ }{\mathop{\text{A}}}\,\] done
clear
View Solution play_arrow
question_answer 61)
The compound having both sp and \[s{{p}^{2}}\] hybridised carbon atom is [IIT-JEE 1981]
A)
Propene done
clear
B)
Propyne done
clear
C)
Propadiene done
clear
D)
None of these done
clear
View Solution play_arrow
question_answer 62)
The halogen which is most reactive in the halogenation of alkenes under sunlight is [IIT-JEE 1981]
A)
Chlorine done
clear
B)
Bromine done
clear
C)
Iodine done
clear
D)
All equal done
clear
View Solution play_arrow
question_answer 63)
When ethene reacts with bromine, it forms [AFMC 2000; KCET 2001]
A)
Chloroethane done
clear
B)
Ethylene dibromide done
clear
C)
1 bromopropane done
clear
D)
1,2-dichloroethene done
clear
View Solution play_arrow
question_answer 64)
Paraffins are soluble in [NCERT 1978]
A)
Distilled water done
clear
B)
Benzene done
clear
C)
Methanol done
clear
D)
Sea water done
clear
View Solution play_arrow
question_answer 65)
Addition of HCl to propene in presence of peroxides gives [BHU 1981, 98]
A)
1-Chloropropane done
clear
B)
2-Chloropropane done
clear
C)
3-Chloropropane done
clear
D)
Propene dichloride done
clear
View Solution play_arrow
question_answer 66)
The name of the product obtained by the addition of HI to propene in presence of peroxide catalyst is [KCET 2000]
A)
Isopropyl iodide done
clear
B)
2-Iodopropene done
clear
C)
2-Iodopropane done
clear
D)
1-Iodopropane done
clear
View Solution play_arrow
question_answer 67)
In the reaction \[{{C}_{2}}{{H}_{5}}CH=C{{H}_{2}}+H-X\to \] Product. What is the product [BHU 2002]
A)
\[{{C}_{2}}{{H}_{5}}-C{{H}_{3}}\] done
clear
B)
\[{{C}_{2}}{{H}_{5}}C{{H}_{2}}-C{{H}_{2}}X\] done
clear
C)
\[{{C}_{2}}{{H}_{5}}-CHX-C{{H}_{3}}\] done
clear
D)
\[C{{H}_{3}}-C{{H}_{2}}X-CH=C{{H}_{2}}\] done
clear
View Solution play_arrow
question_answer 68)
Alkene can be prepared from alkyl halide by the following reagent \[R-X+N{{u}^{-}}\to \text{Alkene}+NuH\] [RPET 2000]
A)
Alc. KOH + heat done
clear
B)
Aq. KOH + cold water done
clear
C)
NaOH done
clear
D)
LiOH done
clear
View Solution play_arrow
question_answer 69)
2-chlorobutane is heated with alcoholic NaOH, the product formed in larger amount is [RPET 1999; AMU 2000]
A)
1-Butene done
clear
B)
1-Butyne done
clear
C)
2-Butene done
clear
D)
All of these done
clear
View Solution play_arrow
question_answer 70)
Ethylene has high b.p. and high vapour pressure at \[{{100}^{o}}C\] and does not dissolve in water. Hence ethylene is separated by this method [UPSEAT 1999]
A)
Simple distillation done
clear
B)
Vacuum distillation done
clear
C)
Vapour distillation done
clear
D)
Alkali treatment done
clear
View Solution play_arrow
question_answer 71)
Addition of bromine to 1, 3-butadiene gives [AMU 1999]
A)
1, 4-addition product only done
clear
B)
1, 2-addition product only done
clear
C)
Both 1, 2-and 1, 4 addition product done
clear
D)
None of these done
clear
View Solution play_arrow
question_answer 72)
In the presence of peroxide, hydrogen chloride and hydrogen iodide do not give anti-Markovnikoff?s addition to alkenes because [IIT-JEE Screening 2001]
A)
Both are highly ionic done
clear
B)
One is oxidising and the other is reducing done
clear
C)
One of the steps is endothermic in both the cases done
clear
D)
All the steps are exothermic in both the cases done
clear
View Solution play_arrow
question_answer 73)
The compound most likely to decolourize a solution of potassium permanganate is [NCERT 1978]
A)
\[C{{H}_{3}}C{{H}_{3}}\] done
clear
B)
C)
\[C{{H}_{3}}CH=CHC{{H}_{2}}C{{H}_{3}}\] done
clear
D)
\[\underset{\,\,\,\,\,C{{H}_{3}}}{\mathop{\underset{|}{\mathop{\overset{\,\,\,\,\,\,C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C{{H}_{3}}-C-C{{H}_{3}}}}\,}}\,}}\,}}\,\] done
clear
View Solution play_arrow
question_answer 74)
Ethylene is converted to X on passing through a mixture of an acidified aqueous solution of palladium chloride and cupric chloride. Which of the following reagents readily take part in addition reaction with X [UPSEAT 2003]
A)
\[B{{r}_{2}}\] done
clear
B)
HBr done
clear
C)
HCl done
clear
D)
HCN done
clear
View Solution play_arrow
question_answer 75)
Addition of HCl does not obey antimarkownikoff?s rule because [UPSEAT 2003]
A)
It is a strong acid done
clear
B)
It is a gas done
clear
C)
Its bond energy is high done
clear
D)
Its bond energy is less done
clear
View Solution play_arrow
question_answer 76)
Correct statement about1, 3-dibutene [UPSEAT 2003]
A)
Conjugated double bonds are present done
clear
B)
Reacts with HBr done
clear
C)
Forms polymer done
clear
D)
All of these done
clear
View Solution play_arrow
question_answer 77)
At low temperatures, the slow addition of molecular bromine to \[C{{H}_{2}}=CH-C{{H}_{2}}-C\equiv CH\] gives [Roorkee Qualifying 1998]
A)
\[C{{H}_{2}}=CH-C{{H}_{2}}-CBr=CHBr\] done
clear
B)
\[BrC{{H}_{2}}-CHBr-C{{H}_{2}}-C\equiv CH\] done
clear
C)
\[C{{H}_{2}}=CH-C{{H}_{2}}-C{{H}_{2}}-CB{{r}_{3}}\] done
clear
D)
\[C{{H}_{3}}-CB{{r}_{2}}-C{{H}_{2}}-C\equiv CH\] done
clear
View Solution play_arrow
question_answer 78)
\[PC{{l}_{5}}\]reacts with propanone, to give [Pb. PMT 2001]
A)
vic-dichloride done
clear
B)
Propanal done
clear
C)
propane-chloride done
clear
D)
gem-dichloride done
clear
View Solution play_arrow
question_answer 79)
The compounds that will give an isomer of 2; 2-dimethyl propane on catalytic hydrogenation are [AMU 1999] (1) \[C{{H}_{3}}CH=\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,}{\mathop{C\,\,-\,\,}}\,}}\,C{{H}_{3}}\] (2) \[C{{H}_{3}}CH=CHC{{H}_{3}}\] (3) \[\overset{\begin{smallmatrix} \,\,\,\,\,\,\,\,\,\,\,\,\begin{matrix} {} & H \\ \end{matrix} \\ \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,| \end{smallmatrix}}{\mathop{C{{H}_{3}}C}}\,=CHC{{H}_{2}}C{{H}_{3}}\] (4) \[C{{H}_{3}}\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,\,}{\mathop{C\,\,\,}}\,=}}\,\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,}{\mathop{C\,}}\,-}}\,C{{H}_{3}}\]
A)
1 and 4 done
clear
B)
2 and 4 done
clear
C)
1 and 3 done
clear
D)
1 and 2 done
clear
View Solution play_arrow
question_answer 80)
Alkene \[R-C-H=C{{H}_{2}}\] reacts readily with \[{{B}_{2}}{{H}_{56}}\] and the product on oxidation with alkaline hydrogen peroxides produces [CBSE PMT 1995]
A)
\[R-C{{H}_{2}}-CHO\] done
clear
B)
\[R-C{{H}_{2}}-C{{H}_{2}}-OH\] done
clear
C)
\[\underset{O}{\mathop{\underset{||}{\mathop{R-C-C{{H}_{3}}}}\,}}\,\] done
clear
D)
\[\underset{\,\,\,\,\,\,OH\,\,\,\,OH}{\mathop{\underset{\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|}{\mathop{R-CH-C{{H}_{3}}}}\,}}\,\] done
clear
View Solution play_arrow
question_answer 81)
Bayer?s reagent is used for detection of [RPMT 2002]
A)
Amines done
clear
B)
Glucose done
clear
C)
Unsaturated bond done
clear
D)
Alcohol done
clear
View Solution play_arrow
question_answer 82)
Which of the following is(are) example(s) of nucleophilic addition reaction in case of acetylene
A)
Addition of water done
clear
B)
Addition of HCN done
clear
C)
Addition of \[AsC{{l}_{3}}\] done
clear
D)
All done
clear
View Solution play_arrow
question_answer 83)
Structural formula for lewisite is
A)
\[\begin{align} & CHCl \\ & \text{ }\!\!|\!\!\text{ }\!\!|\!\!\text{ } \\ & CHAsC{{l}_{3}} \\ \end{align}\] done
clear
B)
\[\begin{align} & CHC{{l}_{2}} \\ & \text{ }\!\!|\!\!\text{ } \\ & CHAsC{{l}_{3}} \\ \end{align}\] done
clear
C)
\[\begin{align} & CHCl \\ & || \\ & CHAsC{{l}_{2}} \\ \end{align}\] done
clear
D)
None of these done
clear
View Solution play_arrow
question_answer 84)
Propene when heated with chlorine at about \[{{500}^{o}}C\] forms [MP PET 1997]
A)
\[C{{H}_{2}}Cl.CH=C{{H}_{2}}\] done
clear
B)
\[C{{H}_{3}}.CHCl.C{{H}_{2}}Cl\] done
clear
C)
\[C{{H}_{2}}Cl.CHCl.C{{H}_{2}}Cl\] done
clear
D)
All the three done
clear
View Solution play_arrow
question_answer 85)
PVC is obtained from vinyl chloride by a reaction called
A)
Addition done
clear
B)
Isomerization done
clear
C)
Polymerization done
clear
D)
Substitution done
clear
View Solution play_arrow
question_answer 86)
Reaction of \[B{{r}_{2}}\] on ethylene in presence of \[NaCl\] gives
A)
\[BrC{{H}_{2}}-C{{H}_{2}}Br\] done
clear
B)
\[ClC{{H}_{2}}-C{{H}_{2}}Br\] done
clear
C)
Both A and B done
clear
D)
None of these done
clear
View Solution play_arrow
question_answer 87)
\[C{{H}_{3}}-CH=C{{H}_{2}}+HBr\xrightarrow{{}}...........,\] the product formed is [AIIMS 1983; CPMT 1997; RPMT 1999, 2003]
A)
\[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-Br\] done
clear
B)
\[C{{H}_{3}}-CHBr-C{{H}_{3}}\] done
clear
C)
\[BrC{{H}_{2}}-CH=C{{H}_{2}}\] done
clear
D)
\[C{{H}_{2}}=C=C{{H}_{2}}\] done
clear
View Solution play_arrow
question_answer 88)
The product of reaction between propene and HBr in the presence of a peroxide is
A)
\[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}Br\] done
clear
B)
\[C{{H}_{3}}-CHBr-C{{H}_{3}}\] done
clear
C)
\[C{{H}_{3}}-C{{H}_{2}}Br\] done
clear
D)
\[C{{H}_{3}}-CH=CHBr\] done
clear
View Solution play_arrow
question_answer 89)
Ozonolysis of 2-methyl butene-2 yields
A)
Only aldehyde done
clear
B)
Only ketone done
clear
C)
Both aldehyde and ketone done
clear
D)
None of these done
clear
View Solution play_arrow
question_answer 90)
The final product formed by the ozonolysis of compound \[RCH=C{{R}_{2}}\] is [NCERT 1978]
A)
RCHO done
clear
B)
\[{{R}_{2}}CO\] done
clear
C)
Both A and B done
clear
D)
None of these done
clear
View Solution play_arrow
question_answer 91)
Which one is an unsaturated compound [BIT 1990]
A)
\[{{C}_{6}}{{H}_{14}}\] done
clear
B)
\[{{C}_{4}}{{H}_{8}}\] done
clear
C)
\[{{C}_{3}}{{H}_{7}}OH\] done
clear
D)
\[C{{H}_{3}}OH\] done
clear
View Solution play_arrow
question_answer 92)
Ethyl alcohol on heating with conc. \[{{H}_{2}}S{{O}_{4}}\] gives [EAMCET 1979; MP PMT 1996]
A)
\[C{{H}_{3}}COO{{C}_{2}}{{H}_{5}}\] done
clear
B)
\[{{C}_{2}}{{H}_{6}}\] done
clear
C)
\[{{C}_{2}}{{H}_{4}}\] done
clear
D)
\[{{C}_{2}}{{H}_{2}}\] done
clear
View Solution play_arrow
question_answer 93)
Monohalides on reacting with alcoholic KOH give [MP PET 1982, 86; DPMT 1981; CPMT 1979, 83]
A)
Alkanes done
clear
B)
Alkenes done
clear
C)
Alkynes done
clear
D)
Aromatic hydrocarbons done
clear
View Solution play_arrow
question_answer 94)
Ethylene is a member of..... series [BHU 1979]
A)
Alkyne done
clear
B)
Olefin done
clear
C)
Paraffin done
clear
D)
Amine done
clear
View Solution play_arrow
question_answer 95)
In a double bond between two carbon atoms of ethene, there are [NCERT 1981]
A)
Two sigma bonds perpendicular to each other done
clear
B)
One sigma and one pi bond done
clear
C)
Two pi bonds perpendicular to each other done
clear
D)
Two pi bonds at an angle of \[{{60}^{o}}\] done
clear
View Solution play_arrow
question_answer 96)
The formation of alkene from alkyl halide is an example of [CPMT 1983; AMU 1982; Pb. CET 1986]
A)
Addition done
clear
B)
Elimination done
clear
C)
Substitution done
clear
D)
A and C done
clear
View Solution play_arrow
question_answer 97)
In the following reaction \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}\underset{475K}{\mathop{\xrightarrow{{{H}_{2}}S{{O}_{4}}}}}\,\] [AIIMS 1983]
A)
\[C{{H}_{3}}CH=CHC{{H}_{3}}\] predominates done
clear
B)
\[C{{H}_{2}}=CHC{{H}_{2}}C{{H}_{3}}\] predominates done
clear
C)
Both are formed in equal amounts done
clear
D)
The amount of production depends on the nature of catalyst done
clear
View Solution play_arrow
question_answer 98)
The compound B formed in the following sequences of reactions is \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH\xrightarrow{PC{{l}_{3}}}A\xrightarrow{Alco.\text{ }KOH}B\] [NCERT 1981]
A)
Propyne done
clear
B)
Propene done
clear
C)
Propanol done
clear
D)
Propane done
clear
View Solution play_arrow
question_answer 99)
n-propyl bromide on treatment with ethanolic potassium hydroxide produces [IIT-JEE 1987; MP PMT 1997]
A)
Propane done
clear
B)
Propene done
clear
C)
Propyne done
clear
D)
Propanol done
clear
View Solution play_arrow
question_answer 100)
The dehydrohalogenation of neopentyl bromide with alcoholic KOH mainly gives [IIT-JEE (Screening) 1990; MP PET 1993]
A)
2-methyl-1-butene done
clear
B)
2-methyl-2-butene done
clear
C)
2, 2-dimethyl-1-butene done
clear
D)
2-butene done
clear
View Solution play_arrow
question_answer 101)
Which is the most reactive hydrocarbon in the following [JIPMER 2002]
A)
Ethane done
clear
B)
Ethyne done
clear
C)
Ethene done
clear
D)
Methane done
clear
View Solution play_arrow
question_answer 102)
Shape of ethylene molecule is [MP PET 1993]
A)
Tetrahedral done
clear
B)
Pyramidal done
clear
C)
Planar done
clear
D)
Linear done
clear
View Solution play_arrow
question_answer 103)
Electrophilic addition on a carbon-carbon double bond involves the intermediate formation of a more stable carbocation. This statement is called
A)
Saytzeff's rule done
clear
B)
Baeyer's effect done
clear
C)
Markownikoff's rule done
clear
D)
None of these done
clear
View Solution play_arrow
question_answer 104)
\[C{{H}_{2}}=CHCl\] reacts with HCl to form [CPMT 1985, 93]
A)
\[C{{H}_{2}}Cl-C{{H}_{2}}Cl\] done
clear
B)
\[C{{H}_{3}}-CHC{{l}_{2}}\] done
clear
C)
\[C{{H}_{2}}=CHCl.HCl\] done
clear
D)
None of these done
clear
View Solution play_arrow
question_answer 105)
Deviation from Markownikoff's rule occurs in presence of
A)
Zinc done
clear
B)
Peroxides done
clear
C)
\[Hg-Zn/HCl\] done
clear
D)
All of these done
clear
View Solution play_arrow
question_answer 106)
Presence of peroxides affects the addition of [BHU 1987]
A)
HBr done
clear
B)
HCl done
clear
C)
HI done
clear
D)
All of these done
clear
View Solution play_arrow
question_answer 107)
Catalyst used in dimerisation of acetylene to prepare chloroprene is [BHU 1984]
A)
\[HgS{{O}_{4}}+{{H}_{2}}S{{O}_{4}}\] done
clear
B)
\[C{{u}_{2}}C{{l}_{2}}\] done
clear
C)
\[C{{u}_{2}}C{{l}_{2}}+N{{H}_{4}}Cl\] done
clear
D)
\[C{{u}_{2}}C{{l}_{2}}+N{{H}_{4}}OH\] done
clear
View Solution play_arrow
question_answer 108)
Chloroprene is
A)
2-chloro-1, 3-butadiene done
clear
B)
3-chloro-2, 3-butadiene done
clear
C)
2, 3-dichlorobutadiene done
clear
D)
None of these done
clear
View Solution play_arrow
question_answer 109)
Chloroprene is used in making [MP PET 1985]
A)
Synthetic rubber done
clear
B)
Plastic done
clear
C)
Petrol done
clear
D)
All of these done
clear
View Solution play_arrow
question_answer 110)
When isobutyl magnesium bromide in dry ether is treated with absolute ethyl alcohol, the products formed are [IIT-JEE 1995]
A)
\[\underset{C{{H}_{3}}\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-CH-C{{H}_{2}}OH}}\,}}\,\] and \[C{{H}_{3}}C{{H}_{2}}MgBr\] done
clear
B)
\[\underset{C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-CH-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}}}\,}}\,\] and \[Mg(OH)Br\] done
clear
C)
\[\underset{C{{H}_{3}}\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-CH-C{{H}_{3}}}}\,}}\,\] and \[C{{H}_{3}}-C{{H}_{2}}OMgBr\] done
clear
D)
\[\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-CH-C{{H}_{3}}}}\,}}\,,C{{H}_{2}}=C{{H}_{2}}\] and \[Mg(OH)Br\] done
clear
View Solution play_arrow
question_answer 111)
The predominant product formed, when 3-methyl-2-pentene reacts with HOCl, is [IIT-JEE 1995]
A)
\[\underset{\,\,\,\,\,\,\,C{{H}_{3}}}{\mathop{\underset{\,\,|}{\mathop{\overset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,Cl\,\,\,OH}{\mathop{\overset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,|}{\mathop{C{{H}_{3}}-C{{H}_{2}}-C-CH-C{{H}_{3}}}}\,}}\,}}\,}}\,\] done
clear
B)
\[\underset{\,\,\,\,\,\,\,C{{H}_{3}}}{\mathop{\underset{\,\,|}{\mathop{\overset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,Cl\,\,\,Cl}{\mathop{\overset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,|}{\mathop{C{{H}_{3}}-C{{H}_{2}}-C-CH-C{{H}_{3}}}}\,}}\,}}\,}}\,\] done
clear
C)
\[\underset{\,\,\,\,\,\,\,\,\,\,C{{H}_{3}}\,Cl}{\mathop{\underset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,|}{\mathop{\overset{\,\,\,\,\,\,\,\,OH}{\mathop{\overset{\,\,\,\,|}{\mathop{C{{H}_{3}}-C{{H}_{2}}-C-CH-C{{H}_{3}}}}\,}}\,}}\,}}\,\] done
clear
D)
\[\underset{C{{H}_{3}}\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{\,\,C{{H}_{3}}\,OH}{\mathop{\overset{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-C-CH-C{{H}_{3}}}}\,}}\,}}\,}}\,\] done
clear
View Solution play_arrow
question_answer 112)
Which of the following occurs easily in ethylene [MNR 1987; NCERT 1979]
A)
Addition done
clear
B)
Substitution done
clear
C)
Elimination done
clear
D)
Rearrangement done
clear
View Solution play_arrow
question_answer 113)
How many gm of bromine will react with 21 gm \[{{C}_{3}}{{H}_{6}}\] [MP PET 1985]
A)
80 done
clear
B)
160 done
clear
C)
240 done
clear
D)
320 done
clear
View Solution play_arrow
question_answer 114)
Conjugate double bond is present in [MP PMT 1987]
A)
Propylene done
clear
B)
Butadiene done
clear
C)
Isobutylene done
clear
D)
Butylene done
clear
View Solution play_arrow
question_answer 115)
On passing vapours of an organic liquid over finely divided Cu at \[573K\] the product was an alkene. This reaction is
A)
Catalytic oxidation of primary alcohol done
clear
B)
Catalytic dehydrogenation of secondary alcohol done
clear
C)
Catalytic dehydrogenation of tertiary alcohol done
clear
D)
Catalytic dehydration of tertiary alcohol done
clear
View Solution play_arrow
question_answer 116)
The total number of sigma\[\sigma \] and pi\[(\pi )\] bonds in an ethylene molecule are
A)
\[4\sigma ,2\pi \] done
clear
B)
\[4\sigma ,1\pi \] done
clear
C)
\[5\sigma ,2\pi \] done
clear
D)
\[5\sigma ,1\pi \] done
clear
View Solution play_arrow
question_answer 117)
Cyclic hydrocarbon molecule A has all the carbon and hydrogens in a single plane. All the carbon-carbon bonds are of same length and less that 1.54 Å but more than 1.34 Å. \[C-C-C\] bond angle will be [CBSE PMT 1989]
A)
\[{{120}^{o}}\] done
clear
B)
\[{{180}^{o}}\] done
clear
C)
\[{{100}^{o}}\] done
clear
D)
\[{{109}^{o}}2{8}'\] done
clear
View Solution play_arrow
question_answer 118)
General formula of alkenes is [CPMT 1975, MNR 1987; NCERT 1987; MP PMT 1994]
A)
\[{{C}_{n}}{{H}_{2n}}\] done
clear
B)
\[{{C}_{n}}{{H}_{2n-2}}\] done
clear
C)
\[{{C}_{n}}{{H}_{2n+2}}\] done
clear
D)
\[{{C}_{n}}{{H}_{2n-1}}\] done
clear
View Solution play_arrow
question_answer 119)
The product of following reaction is \[\underset{C{{H}_{3}}\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{C{{H}_{3}}\,\,\,\,\,}{\mathop{\overset{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-C-CH=C{{H}_{2}}}}\,}}\,}}\,}}\,\underset{\text{(ii) }NaB{{H}_{4}}}{\mathop{\xrightarrow{(i)\text{ }Hg{{(OAc)}_{2}};{{H}_{2}}O}}}\,\] [MP PMT 1986; MP PET 1997]
A)
\[\underset{C{{H}_{3}}\,OH}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,}{\mathop{\overset{C{{H}_{2}}\,\,\,\,\,}{\mathop{\overset{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-C-CH-C{{H}_{2}}}}\,}}\,}}\,}}\,\] done
clear
B)
\[\underset{C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{\,\,C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-C-C{{H}_{2}}-C{{H}_{2}}OH}}\,}}\,}}\,}}\,\] done
clear
C)
\[\underset{C{{H}_{3}}\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{\,\,OH\,C{{H}_{3}}}{\mathop{\overset{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-C-CH-C{{H}_{3}}}}\,}}\,}}\,}}\,\] done
clear
D)
\[\underset{C{{H}_{3}}\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{\,\,C{{H}_{3}}\,}{\mathop{\overset{\,|\,\,\,\,\,\,\,\,\,\,\,}{\mathop{HOC{{H}_{2}}-C-C{{H}_{2}}-C{{H}_{2}}}}\,}}\,}}\,}}\,\] done
clear
View Solution play_arrow
question_answer 120)
Which one of the following organic compounds decolourizes an alkaline \[KMn{{O}_{4}}\] solution [CPMT 1987, 93]
A)
\[C{{S}_{2}}\] done
clear
B)
\[{{C}_{3}}{{H}_{6}}\] done
clear
C)
\[{{C}_{3}}{{H}_{8}}\] done
clear
D)
\[C{{H}_{3}}OH\] done
clear
View Solution play_arrow
question_answer 121)
Decolourization of alkaline \[KMn{{O}_{4}}\] is used as a test for [AMU 1983]
A)
Aromatic hydrocarbons done
clear
B)
Olefinic hydrocarbons done
clear
C)
Acetylenic hydrocarbons done
clear
D)
Cycloalkanes done
clear
View Solution play_arrow
question_answer 122)
The reaction \[C{{H}_{2}}=C{{H}_{2}}+{{H}_{2}}\underset{250-{{300}^{o}}C}{\mathop{\xrightarrow{Ni}}}\,C{{H}_{3}}-C{{H}_{3}}\] is called [MP PMT 1996; CBSE PMT 2001; MH CET 2001;BHU 2002]
A)
Wurtz's reaction done
clear
B)
Kolbe's reaction done
clear
C)
Sabatier and Senderen's reaction done
clear
D)
Carbylamine reaction done
clear
View Solution play_arrow
question_answer 123)
The alkene which on ozonolysis yields acetone is [MP PMT 1986, 2000]
A)
\[C{{H}_{2}}=C{{H}_{2}}\] done
clear
B)
\[C{{H}_{3}}-CH=C{{H}_{2}}\] done
clear
C)
\[{{(C{{H}_{3}})}_{2}}C=C{{(C{{H}_{3}})}_{2}}\] done
clear
D)
\[C{{H}_{3}}-CH=CH-C{{H}_{3}}\] done
clear
View Solution play_arrow
question_answer 124)
\[C{{H}_{3}}CH=CHCHO\] is oxidized to \[C{{H}_{3}}CH=CHCOOH\] using [NCERT 1978]
A)
Alkaline potassium permanganate done
clear
B)
Acidified potassium permanganate done
clear
C)
Selenium dioxide done
clear
D)
Osmium tetroxide done
clear
View Solution play_arrow
question_answer 125)
The order of increasing reactivity towards HCl of the following compounds will be (1) \[C{{H}_{2}}=C{{H}_{2}}\] (2) \[{{(C{{H}_{3}})}_{2}}C=C{{H}_{2}}\] (3) \[C{{H}_{3}}CH=CHC{{H}_{3}}\] [MP PET 1994]
A)
\[1<2<3\] done
clear
B)
\[1<3<2\] done
clear
C)
\[3<2<1\] done
clear
D)
\[2<1<3\] done
clear
View Solution play_arrow
question_answer 126)
The reagent which is used to distinguish between propene and propyne is [MP PET 1994; IIT-JEE (Screening) 2000; AIIMS 2000; Pb. PMT 2002; BHU 2003]
A)
Bromine done
clear
B)
Alkaline \[KMn{{O}_{4}}\] done
clear
C)
Ammoniacal \[AgN{{O}_{3}}\] done
clear
D)
Ozone done
clear
View Solution play_arrow
question_answer 127)
Which one of the following reactions would be the best for the formation of 2-bromobutane [MP PET 1994] (1) \[C{{H}_{3}}CH=CHC{{H}_{2}}C{{H}_{3}}\xrightarrow{HBr}\] (2) \[C{{H}_{3}}C{{H}_{2}}CH=C{{H}_{2}}\xrightarrow{HBr}\] (3) \[C{{H}_{3}}CH=CHC{{H}_{3}}\xrightarrow{B{{r}_{2}}}\] (4) \[C{{H}_{3}}C{{H}_{2}}CH=C{{H}_{2}}\underset{\text{Peroxide}}{\mathop{\xrightarrow{HBr}}}\,\]
A)
1 done
clear
B)
2 done
clear
C)
3 done
clear
D)
4 done
clear
View Solution play_arrow
question_answer 128)
If HCl is added over \[C{{H}_{2}}=C<\begin{matrix} C{{H}_{3}} \\ C{{H}_{3}} \\ \end{matrix}\] then what is formed [CPMT 1996]
A)
\[\underset{Cl\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{2}}}}\,}}\,=C<\begin{matrix} C{{H}_{3}} \\ C{{H}_{3}} \\ \end{matrix}\] done
clear
B)
\[\underset{\,\,\,}{\mathop{\underset{\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{2}}}}\,}}\,-CH<-\begin{matrix} Cl \\ C{{H}_{3}} \\ C{{H}_{3}} \\ \end{matrix}\] done
clear
C)
\[\]\[\underset{\,\,\,}{\mathop{\underset{\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{2}}}}\,}}\,=C<\begin{matrix} C{{H}_{3}} \\ C{{H}_{2}}Cl \\ \end{matrix}\] done
clear
D)
None of these done
clear
View Solution play_arrow
question_answer 129)
Position of double bond in an organic compound is determined by [DCE 2001; RPMT 2002]
A)
Ozonolysis done
clear
B)
Oxidation done
clear
C)
Reduction done
clear
D)
Hydrogenation done
clear
View Solution play_arrow
question_answer 130)
A gas decolourises Bayer's reagent but does not react with Tollen's reagent, this gas is [MP PMT 2001]
A)
Ethene done
clear
B)
Ethyne done
clear
C)
Ethane done
clear
D)
Methane done
clear
View Solution play_arrow
question_answer 131)
Formation of 2-butene from 2-bromobutane is according to
A)
Markowikoff's done
clear
B)
Bayer done
clear
C)
Saytzeff done
clear
D)
Wurtz done
clear
View Solution play_arrow
question_answer 132)
An alkene on ozonolysis gave acetaldehyde the alkene is
A)
Ethylene done
clear
B)
Propene done
clear
C)
1-butene done
clear
D)
2-butene done
clear
View Solution play_arrow
question_answer 133)
Indicate the organic structure for the product expected when 2-methyl propene is heated with acetyl chloride in presence of anhydrous zinc chloride [CBSE PMT 1989]
A)
\[\underset{Cl\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-C-C{{H}_{2}}-CO-C{{H}_{3}}}}\,}}\,}}\,}}\,\] done
clear
B)
\[\underset{C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{H\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-C-C{{H}_{2}}-CO-C{{H}_{3}}}}\,}}\,}}\,}}\,\] done
clear
C)
\[\overset{\,\,O}{\mathop{\overset{\,||}{\mathop{C{{H}_{3}}-C-O-C}}\,}}\,<-\begin{matrix} Me \\ Me \\ Me \\ \end{matrix}\] done
clear
D)
\[C{{H}_{3}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-\overset{C{{H}_{3}}}{\mathop{\overset{|\,\,\,\,\,\,\,}{\mathop{C=}}\,}}\,C{{H}_{2}}\] done
clear
View Solution play_arrow
question_answer 134)
The reaction \[\underset{OH}{\mathop{\underset{|\,}{\mathop{\overset{\,\,\,\,\,\,\,C{{H}_{3}}}{\mathop{\overset{\,|}{\mathop{C{{H}_{3}}-C-C{{H}_{3}}}}\,}}\,}}\,}}\,\xrightarrow{{{H}_{2}}S{{O}_{4}}}\overset{\,\,\,\,\,\,\,C{{H}_{3}}}{\mathop{\overset{\,|}{\mathop{C{{H}_{3}}-C=C{{H}_{2}}}}\,}}\,\] is the example of [AMU 1983]
A)
Sulphonation done
clear
B)
Dehydration done
clear
C)
Alkylation done
clear
D)
Decomposition done
clear
View Solution play_arrow
question_answer 135)
Olefins can be hydrogenated by [AIIMS 1991]
A)
Zinc and \[HCl\] done
clear
B)
Nascent hydrogen done
clear
C)
Raney Ni and \[{{H}_{2}}\] done
clear
D)
Lithium hydride in ether done
clear
View Solution play_arrow
question_answer 136)
Electrolysis of cold concentrated aqueous solution of potassium succinate yields [CPMT 1985; MP PMT 1986]
A)
Ethane done
clear
B)
Ethyne done
clear
C)
Ethene done
clear
D)
Ethane-1, 2-diol done
clear
View Solution play_arrow
question_answer 137)
A hydrocarbon containing 2 carbon atoms gives Sabatier and Senderen's reaction but does not give precipitate with ammoniacal silver nitrate solution. The hydrocarbon in the question is [MADT Bihar 1983]
A)
Ethane done
clear
B)
Acetylene done
clear
C)
Ethylene done
clear
D)
None of these done
clear
View Solution play_arrow
question_answer 138)
The reaction \[C{{H}_{2}}=CH-C{{H}_{3}}+HBr\to C{{H}_{3}}CHBr-C{{H}_{3}}\] is [CBSE PMT 1996]
A)
Nucleophilic addition done
clear
B)
Electrophilic addition done
clear
C)
Electrophilic substitution done
clear
D)
Free radical addition done
clear
View Solution play_arrow
question_answer 139)
What is the product of the reaction of 1, 3-butadiene with Br2 [Orissa JEE 2003]
A)
1,4 -dibromobutene done
clear
B)
1,2 -dibromobutene done
clear
C)
3,4-dibromobutene done
clear
D)
2,3-dibromo-2-butene done
clear
View Solution play_arrow
question_answer 140)
An alkene given two moles of HCHO, one mole of \[C{{O}_{2}}\]and one mole of \[C{{H}_{3}}COCHO\]on ozonolysis. What is its structure [Orissa JEE 2003]
A)
\[C{{H}_{2}}=C=CH-C{{H}_{2}}-C{{H}_{3}}\] done
clear
B)
\[C{{H}_{2}}=CH-\overset{C{{H}_{3}}}{\mathop{\overset{\,\,|\,\,\,\,\,\,\,\,\,\,\,}{\mathop{CH\,-}}\,}}\,CH=C{{H}_{2}}\] done
clear
C)
\[C{{H}_{2}}=C=\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,\,\,\,}{\mathop{C\,-\,}}\,}}\,C{{H}_{3}}\] done
clear
D)
\[C{{H}_{2\,}}=C=\overset{C{{H}_{3}}}{\mathop{\,\overset{|\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C\,\,\,-\,}}\,}}\,CH=C{{H}_{2}}\] done
clear
View Solution play_arrow
question_answer 141)
In the reaction \[C{{H}_{3}}CH=C{{H}_{2}}+{{H}_{2}}O+[O]\underset{Acid}{\mathop{\xrightarrow{KMn{{O}_{4}}}}}\,\]\[C{{H}_{3}}-\underset{OH\,\,}{\mathop{\underset{|}{\mathop{C}}\,H}}\,\,-\underset{\,OH\,\,\,\,\,\,}{\mathop{\underset{|}{\mathop{C}}\,{{H}_{2}}}}\,\,\,\xrightarrow{[O]}X+HCOOH\] X is [MP PMT 2002]
A)
\[C{{H}_{3}}C{{H}_{2}}COOH\] done
clear
B)
\[C{{H}_{3}}COOH\] done
clear
C)
\[C{{H}_{3}}C{{H}_{2}}CHO\] done
clear
D)
\[C{{H}_{3}}C{{H}_{2}}OH\] done
clear
View Solution play_arrow
question_answer 142)
Which of the following alkenes gives only acetic acid and on oxidation with potassium permanganate solution [MP PET 2003]
A)
Ethylene done
clear
B)
1-Butene done
clear
C)
Propene done
clear
D)
2-Butene done
clear
View Solution play_arrow
question_answer 143)
Butene-1 may be converted to butane by reaction with [AIEEE 2003]
A)
Zn-HCl done
clear
B)
Sn-HCl done
clear
C)
Zn-Hg done
clear
D)
Pd/\[{{H}_{2}}\] done
clear
View Solution play_arrow
question_answer 144)
sThe major product formed when propene reacts with HBr in presence of peroxides is [NCERT 1980; CBSE PMT 1989]
A)
n-propyl bromide done
clear
B)
Isopropyl bromide done
clear
C)
n-propyl alcohol done
clear
D)
1, 3-dibromopropane done
clear
View Solution play_arrow
question_answer 145)
Ethyl hydrogen sulphate is obtained by the reaction of \[{{H}_{2}}S{{O}_{4}}\] on [CPMT 1985]
A)
Ethylene done
clear
B)
Ethane done
clear
C)
Ethyl chloride done
clear
D)
Ethanol done
clear
View Solution play_arrow
question_answer 146)
Ethylene reacts with ozone to give [DPMT 1981]
A)
Formaldehyde done
clear
B)
Ethyl alcohol done
clear
C)
Ozonide done
clear
D)
Acetaldehyde done
clear
View Solution play_arrow
question_answer 147)
Which of the following aliphatic compounds will discharge red colour of bromine
A)
\[{{C}_{2}}{{H}_{4}}\] done
clear
B)
\[{{C}_{3}}{{H}_{6}}\] done
clear
C)
\[{{C}_{4}}{{H}_{8}}\] done
clear
D)
All of these done
clear
View Solution play_arrow
question_answer 148)
Chlorination can be done on
A)
\[C{{H}_{3}}-CH=C{{h}_{2}}\] done
clear
B)
\[C{{H}_{2}}=C{{H}_{2}}\] done
clear
C)
CH º CH done
clear
D)
None of these done
clear
View Solution play_arrow
question_answer 149)
Addition of HI on the double bond of propene yields isopropyl iodide and not n-propyl iodide as the major product. This is because the addition proceeds through [CPMT 1988]
A)
A more stable carbonium ion done
clear
B)
A more stable carbanion done
clear
C)
A more stable free radical done
clear
D)
None of the above being a concerted reaction done
clear
View Solution play_arrow
question_answer 150)
When butene-1 is mixed with excess of bromine, the expected reaction product is [CPMT 1974; BHU 1980]
A)
1, 2-dibromobutane done
clear
B)
1, 1-dibromobutane done
clear
C)
2, 2-dibromobutane done
clear
D)
Perbromobutane done
clear
View Solution play_arrow
question_answer 151)
A compound ?X? on ozonolysis forms two molecules of HCHO. Compound ?X? is [AIIMS 1987; CPMT 1993]
A)
\[{{C}_{2}}{{H}_{4}}\] done
clear
B)
\[{{C}_{2}}{{H}_{2}}\] done
clear
C)
\[{{C}_{2}}{{H}_{6}}\] done
clear
D)
\[{{C}_{6}}{{H}_{6}}\] done
clear
View Solution play_arrow
question_answer 152)
For the reaction \[C{{H}_{3}}-CH=C{{H}_{2}}+HOCl\to A\] the product A is [Orissa JEE 2002]
A)
\[C{{H}_{3}}-CHCl-C{{H}_{2}}OH\] done
clear
B)
\[C{{H}_{3}}-\underset{OH}{\mathop{\underset{\,|\,\,\,\,\,\,}{\mathop{CH}}\,}}\,-C{{H}_{2}}-Cl\] done
clear
C)
\[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-COCl\] done
clear
D)
\[C{{H}_{3}}-\underset{\,OH\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,}{\mathop{\overset{\,\,Cl\,\,\,\,}{\mathop{\overset{|}{\mathop{C}}\,\,\,-}}\,}}\,}}\,C{{H}_{3}}\] done
clear
View Solution play_arrow
question_answer 153)
\[{{(C{{H}_{3}})}_{2}}C=\underset{\underset{C{{H}_{3}}}{\mathop{|\,\,\,\,\,\,\,}}\,}{\mathop{CH}}\,\underset{{{H}_{2}}}{\mathop{\xrightarrow{\text{Catalyst}}}}\,\]Optical isomers [BHU 2003]
A)
2 done
clear
B)
4 done
clear
C)
Zero done
clear
D)
3 done
clear
View Solution play_arrow
question_answer 154)
Isobutene \[+HBr\,\,\xrightarrow[\text{Peroxide}]{}\] product is [BHU 2003]
A)
Tertiary butyl bromide done
clear
B)
Isobutyl bromide done
clear
C)
Tertiary butyl alcohol done
clear
D)
Isobutyl alcohol done
clear
View Solution play_arrow
question_answer 155)
Which of the following represents the given mode of hybridisation sp2_ sp2_ sp-sp from left to right [IIT-JEE (Screening) 2003]
A)
\[{{H}_{2}}C=CH-C\equiv CH\] done
clear
B)
\[HC\equiv C-C\equiv CH\] done
clear
C)
\[{{H}_{2}}C=C=C=C{{H}_{2}}\] done
clear
D)
View Solution play_arrow
question_answer 156)
?The negative part of addenda adds on to the carbon atom linked with least number of hydrogen atoms?. This statement is called [DPMT 1982; AIIMS 1988; AFMC 2004]
A)
Thiele's principle done
clear
B)
Bayer's strain theory done
clear
C)
Markownikoff's rule done
clear
D)
Peroxide effect done
clear
View Solution play_arrow
question_answer 157)
The product obtained, heating ethanol with conc. \[{{H}_{2}}S{{O}_{4}}\]at \[{{165}^{o}}-{{170}^{o}}\], is [MP PMT 2003]
A)
\[{{({{C}_{2}}{{H}_{5}})}_{2}}S{{O}_{4}}\] done
clear
B)
\[C{{H}_{2}}=C{{H}_{2}}\] done
clear
C)
\[C{{H}_{3}}COOH\] done
clear
D)
\[{{C}_{2}}{{H}_{5}}HS{{O}_{4}}\] done
clear
View Solution play_arrow
question_answer 158)
Which of the following is the most stable
A)
1-butene done
clear
B)
2-butene done
clear
C)
1-pentene done
clear
D)
2-pentene done
clear
View Solution play_arrow
question_answer 159)
Which doesn?t follow Markownikoff?s rule [JEE Orissa 2004; MP PMT 2004; BCECE 2005]
A)
\[C{{H}_{3}}-CH=C{{H}_{2}}\] done
clear
B)
\[C{{H}_{3}}CH=CHC{{H}_{3}}\] done
clear
C)
\[C{{H}_{3}}-\underset{C{{H}_{3}}\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,}{\mathop{CH-}}\,}}\,CH=C{{H}_{2}}\] done
clear
D)
\[C{{H}_{3}}-C{{H}_{2}}-CH=C{{H}_{2}}\] done
clear
View Solution play_arrow
question_answer 160)
The product of acid catalyzed hydration of 2-phenyl propene is [IIT JEE (Screening) 2004]
A)
3-phenyl-2-propanol done
clear
B)
1-phenyl-2-propanol done
clear
C)
2-phenyl-2-propanol done
clear
D)
2-phenyl-1-propanol done
clear
View Solution play_arrow
question_answer 161)
A reagent used to test for unsaturation of allkene is [BHU 2004]
A)
conc. \[{{H}_{2}}S{{O}_{4}}\] done
clear
B)
Ammonical \[C{{u}_{2}}C{{l}_{2}}\] done
clear
C)
Ammonical \[AgN{{O}_{3}}\] done
clear
D)
Solution of \[B{{r}_{2}}\]in \[CC{{l}_{4}}\] done
clear
View Solution play_arrow
question_answer 162)
Propylene on hydrolysis with sulphuric acid forms [MH CET-2003]
A)
n-propyl alcohol done
clear
B)
Isopropyl alcohol done
clear
C)
Ethyl alcohol done
clear
D)
Butyl alcohol done
clear
View Solution play_arrow
question_answer 163)
An alkene, on ozonolysis gives formaldehyde and acetaldehyde. The alkene is : [BVP 2004]
A)
Ethene done
clear
B)
Propene done
clear
C)
Butene-1 done
clear
D)
Butene-2 done
clear
View Solution play_arrow
question_answer 164)
In the reaction, \[{{H}_{2}}C=C{{H}_{2}}\xrightarrow{\begin{smallmatrix} \text{cold alkaline} \\ \text{KMn}{{\text{O}}_{\text{4}}} \end{smallmatrix}}(A)\]: Product A is : [Pb. CET 2000]
A)
Ethylene glycol done
clear
B)
Acetic acid done
clear
C)
Ethane done
clear
D)
Butyric acid done
clear
View Solution play_arrow
question_answer 165)
Using anhydrous \[AlC{{l}_{3}}\] as catalyst, which one of the following reaction produces ethylbenzene \[(PhEt)\] [CBSE PMT 2004]
A)
\[{{H}_{2}}C=C{{H}_{2}}+{{C}_{6}}{{H}_{6}}\] done
clear
B)
\[{{H}_{3}}C-C{{H}_{3}}+{{C}_{6}}{{H}_{6}}\] done
clear
C)
\[{{H}_{3}}C-C{{H}_{2}}OH+{{C}_{6}}{{H}_{6}}\] done
clear
D)
\[C{{H}_{3}}-CH=C{{H}_{2}}+{{C}_{6}}{{H}_{6}}\] done
clear
View Solution play_arrow
question_answer 166)
Which of these does not follow Anti-Markownikoff's rule [Orissa JEE 2005]
A)
2-butene done
clear
B)
1-butene done
clear
C)
2-pentene done
clear
D)
2-hexene done
clear
View Solution play_arrow
question_answer 167)
Reaction of HBr with propene in the presence of peroxide gives [CBSE PMT 2004]
A)
Allyl bromide done
clear
B)
n-propyl bromide done
clear
C)
Isopropyl bromide done
clear
D)
3-bromo propane done
clear
View Solution play_arrow
question_answer 168)
Which of the following react with \[KMn{{O}_{4}}\] but does not react with \[AgN{{O}_{3}}\]? [BCECE 2005]
A)
\[{{C}_{2}}{{H}_{6}}\] done
clear
B)
\[C{{H}_{4}}\] done
clear
C)
\[{{C}_{2}}{{H}_{4}}\] done
clear
D)
\[{{C}_{2}}{{H}_{2}}\] done
clear
View Solution play_arrow
question_answer 169)
3-Phenylpropene on reaction with HBr gives (as a major product) [AIIMS 2005]
A)
\[{{C}_{6}}{{H}_{5}}C{{H}_{2}}CH(Br)C{{H}_{3}}\] done
clear
B)
\[{{C}_{6}}{{H}_{5}}CH(Br)C{{H}_{2}}C{{H}_{3}}\] done
clear
C)
\[{{C}_{6}}{{H}_{5}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}Br\] done
clear
D)
\[{{C}_{6}}{{H}_{5}}CH(Br)CH=C{{H}_{2}}\] done
clear
View Solution play_arrow
question_answer 170)
Reaction of one molecule of \[HBr\] with one molecule of 1,3-butadiene at \[{{40}^{o}}C\] gives predominantly [AIEEE 2005]
A)
3-bromobutene under kinetically controlled conditions done
clear
B)
1-bromo-2-butene under thermodyanamically controlled conditions done
clear
C)
3-bromobutene under thermodynamically controlled conditions done
clear
D)
1-bromo-2-butene under kinetically controlled conditions done
clear
View Solution play_arrow
question_answer 171)
The only alcohol that can be prepared by the indirect hydration of alkene is [AFMC 2005]
A)
Ethyl alcohol done
clear
B)
Propyl alcohol done
clear
C)
Isobutyl alcohol done
clear
D)
Methyl alcohol done
clear
View Solution play_arrow
question_answer 172)
The reaction of HBr with \[\overset{\overset{\,\,\,\,\,\,C{{H}_{3}}}{\mathop{|\,}}\,}{\mathop{C{{H}_{3}}-C=C{{H}_{2}}}}\,\] in the presence of peroxide will give [BHU 2005]
A)
\[\underset{\underset{C{{H}_{3}}}{\mathop{|\,\,\,\,\,\,\,}}\,}{\mathop{C{{H}_{3}}CBrC{{H}_{3}}}}\,\] done
clear
B)
CH3CH2CH2CH2Br done
clear
C)
\[\overset{\overset{C{{H}_{3}}}{\mathop{|\,\,\,\,\,\,\,\,\,\,\,}}\,}{\mathop{C{{H}_{3}}CHC{{H}_{2}}Br}}\,\] done
clear
D)
\[\overset{\overset{\,\,\,\,\,\,\,\,\,\,\,\,\,C{{H}_{3}}}{\mathop{\,\,\,\,\,\,\,\,\,\,|}}\,}{\mathop{C{{H}_{3}}C{{H}_{2}}CHC{{H}_{3}}}}\,\] done
clear
View Solution play_arrow
question_answer 173)
A gas decolourised by \[KMn{{O}_{4}}\] solution but gives no precipitate with ammoniacal cuprous chloride is [KCET 2005]
A)
Ethane done
clear
B)
Methane done
clear
C)
Ethene done
clear
D)
Acetylene done
clear
View Solution play_arrow
question_answer 174)
Cyclohexene on reaction with \[Os{{O}_{4}}\] followed by reaction with \[NaHS{{O}_{3}}\] gives [Orissa JEE 2005]
A)
cis-diol done
clear
B)
trans-diol done
clear
C)
epoxy done
clear
D)
alcohol done
clear
View Solution play_arrow