question_answer 1)
Which represents an alkane [CPMT 1976]
A)
\[{{C}_{5}}{{H}_{8}}\] done
clear
B)
\[{{C}_{8}}{{H}_{6}}\] done
clear
C)
\[{{C}_{9}}{{H}_{10}}\] done
clear
D)
\[{{C}_{7}}{{H}_{16}}\] done
clear
View Solution play_arrow
question_answer 2)
The decreasing order of boiling points is [BHU 1999]
A)
N-Pentane > iso-Pentane > neo-Pentane done
clear
B)
iso-Pentane > n-Pentane > neo-Pentane done
clear
C)
neo-Pentane > iso-Pentane > n-Pentane done
clear
D)
n-Pentane > neo-Pentane > iso-Pentane done
clear
View Solution play_arrow
question_answer 3)
To prepare a pure sample of n-hexane using sodium metal as one reactant, the other reactant will be [BHU 1999]
A)
n-propyl bromide done
clear
B)
Ethyl bromide and n-butyl bromide done
clear
C)
Ethyl chloride and n-butyl chloride done
clear
D)
Methyl bromide and n -pentyl chloride done
clear
View Solution play_arrow
question_answer 4)
In the preparation of Grignard reagent from haloalkane, the metal [RPET 1999]
A)
Mg done
clear
B)
Zn done
clear
C)
Li done
clear
D)
K done
clear
View Solution play_arrow
question_answer 5)
Sodium acetate can be converted to ethane by [Pune CET 1998]
A)
Heating with \[LiAl{{H}_{4}}\] done
clear
B)
Electrolysing its aqueous solution done
clear
C)
Heating with sodalime done
clear
D)
Heating with calcium acetate done
clear
View Solution play_arrow
question_answer 6)
Which of the following compounds is used in antiknock compositions to prevent the deposition of oxides of lead on spark plug, combustion chamber and exhaust pipe [KCET 1998]
A)
Glycerol done
clear
B)
Glycol done
clear
C)
1, 2-dibromoethane done
clear
D)
Benzene done
clear
View Solution play_arrow
question_answer 7)
Which of petroleum corresponds to kerosene oil [DCE 1999]
A)
\[{{C}_{15}}-{{C}_{18}}\] done
clear
B)
\[{{C}_{10}}-{{C}_{12}}\] done
clear
C)
\[{{C}_{5}}-{{C}_{9}}\] done
clear
D)
\[{{C}_{1}}-{{C}_{9}}\] done
clear
View Solution play_arrow
question_answer 8)
In the reaction \[C{{H}_{3}}-Br+2Na+Br-C{{H}_{3}}\to \], the product called [Pb. CET 1999; CPMT 1983. 86; KCET 1992; MP PMT 1994; BHU 1998; MP PMT 2002; MP PET 1986]
A)
Wurtz reaction done
clear
B)
Aldol condensation done
clear
C)
Perkin's reaction done
clear
D)
Levit reaction done
clear
View Solution play_arrow
question_answer 9)
Iodoethane reacts with sodium in the presence of dry ether. The product is [AFMC 1997; KCET 1998]
A)
Pentane done
clear
B)
Propane done
clear
C)
Butene done
clear
D)
Butane done
clear
View Solution play_arrow
question_answer 10)
Which of the following is oxidised by \[KMn{{O}_{4}}\]
A)
Methane done
clear
B)
Pentane done
clear
C)
Isobutane done
clear
D)
Neopentane done
clear
View Solution play_arrow
question_answer 11)
Which of the following has maximum stability [AIIMS 2001]
A)
\[\overset{+}{\mathop{C}}\,{{H}_{3}}\] done
clear
B)
\[C{{H}_{3}}-\overset{H}{\mathop{\overset{|}{\mathop{\underset{+}{\mathop{C}}\,}}\,}}\,-H\] done
clear
C)
\[C{{H}_{3}}-\overset{H}{\mathop{\overset{|}{\mathop{\underset{+}{\mathop{C}}\,}}\,}}\,-C{{H}_{3}}\] done
clear
D)
\[C{{H}_{3}}-\overset{C{{H}_{3}}}{\mathop{\overset{|\,\,\,\,\,\,\,\,\,\,}{\mathop{\underset{+}{\mathop{C}}\,\,\,\,-\,\,\,}}\,}}\,C{{H}_{3}}\] done
clear
View Solution play_arrow
question_answer 12)
The most volatile compound is [DPMT 2000]
A)
2, 2-dimethyl propane done
clear
B)
2-methyl butane done
clear
C)
Isobutane done
clear
D)
n-pentane done
clear
View Solution play_arrow
question_answer 13)
In Wurtz reaction, the reagent used is [EAMCET 1998]
A)
Na done
clear
B)
\[{Na}/{\text{liquid }N{{H}_{3}}}\;\] done
clear
C)
\[{Na}/{\text{dry ether}}\;\] done
clear
D)
\[{Na}/{\text{dry alcohol}}\;\] done
clear
View Solution play_arrow
question_answer 14)
Which of the following has highest octane number [MP PMT 2000]
A)
n-hexane done
clear
B)
n-heptane done
clear
C)
n-pentane done
clear
D)
2, 2, 4-trimethyl pentane done
clear
View Solution play_arrow
question_answer 15)
What is freon-12 [RPET 1999]
A)
Pesticide done
clear
B)
Refrigerant done
clear
C)
Solvent done
clear
D)
Lubricant done
clear
View Solution play_arrow
question_answer 16)
The petrol having octane number 80 has [MP PET 2000]
A)
20% normal heptane + 80% iso-octane done
clear
B)
80% normal heptane + 20% iso-octane done
clear
C)
20% normal heptane + 80% normal octane done
clear
D)
80% normal heptane + 20% normal octane done
clear
View Solution play_arrow
question_answer 17)
Which of the following reactions will not give propane [DPMT 2005]
A)
\[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}Cl\underset{{{H}_{2}}O}{\mathop{\xrightarrow{Mg/\text{ether}}}}\,\] done
clear
B)
\[C{{H}_{3}}COCl\underset{{{H}_{2}}O}{\mathop{\xrightarrow{C{{H}_{3}}MgX}}}\,\] done
clear
C)
\[C{{H}_{3}}CH=C{{H}_{2}}\underset{C{{H}_{3}}COOH}{\mathop{\xrightarrow{{{B}_{2}}{{H}_{6}}}}}\,\] done
clear
D)
\[\underset{OH\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}CH-C{{H}_{3}}}}\,}}\,\xrightarrow{P/HI}\] done
clear
View Solution play_arrow
question_answer 18)
The shape of methane molecule is [MP PET 1997, 2001]
A)
Linear done
clear
B)
Trigonal planar done
clear
C)
Square planar done
clear
D)
Tetrahedral done
clear
View Solution play_arrow
question_answer 19)
Which of the following shows only one brominated compound [CPMT 1996]
A)
Butene-2 done
clear
B)
2, 2-dimethylpropane done
clear
C)
Butyne-1 done
clear
D)
Butanol-3 done
clear
View Solution play_arrow
question_answer 20)
Kerosene is used as fuel because it is [CPMT 1996]
A)
Less volatile done
clear
B)
More volatile done
clear
C)
Cheap done
clear
D)
Abundantly available done
clear
View Solution play_arrow
question_answer 21)
\[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}\underset{HBr}{\mathop{\xrightarrow{AlC{{l}_{3}}}}}\,\text{Product}\]. Product in above reaction is [RPMT 2003]
A)
\[C{{H}_{3}}-\underset{Br\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,}{\mathop{CH\,}}\,}}\,-C{{H}_{2}}-C{{H}_{3}}\] done
clear
B)
\[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,\,}{\mathop{CH}}\,}}\,-C{{H}_{3}}\] done
clear
C)
\[\underset{Br\,\,\,\,}{\mathop{\underset{\,\,|\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{2}}}}\,}}\,-C{{H}_{2}}-\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{2}}}}\,}}\,\] done
clear
D)
All of these done
clear
View Solution play_arrow
question_answer 22)
Which of the following statements is not true for ethane [AIIMS 1996]
A)
It can be chlorinated with chlorine done
clear
B)
It can be catalytically hydrogenated done
clear
C)
When oxidised produces \[C{{O}_{2}}\] and \[{{H}_{2}}O\] done
clear
D)
It is a homologue of iso-butane done
clear
View Solution play_arrow
question_answer 23)
Petroleum refining is [AIIMS 1996; KCET 2004]
A)
Distillation of petroleum to get different fractions done
clear
B)
Obtaining aromatic compounds from aliphatic compounds present in petroleum done
clear
C)
Cracking of petroleum to get gaseous hydrocarbons done
clear
D)
Purification of petroleum done
clear
View Solution play_arrow
question_answer 24)
The chemical added to leaded petrol to prevent the deposition of lead in the combustion chamber is [Kerala (Med.) 2003]
A)
Iso-octane done
clear
B)
Ethylene dibromide done
clear
C)
Tetraethyl lead done
clear
D)
Mercaptan done
clear
E)
n-Heptane done
clear
View Solution play_arrow
question_answer 25)
In the commercial gasolines, the type of hydrocarbons which are more desirable is [CBSE PMT 1997; AFMC 1997]
A)
Branched hydrocarbon done
clear
B)
Straight-chain hydrocarbon done
clear
C)
Linear unsaturated hydrocarbon done
clear
D)
Toluene done
clear
View Solution play_arrow
question_answer 26)
Which of the following is not formed by the reaction of \[C{{l}_{2}}\] on \[C{{H}_{4}}\] in sunlight [AIIMS 1987]
A)
\[CHC{{l}_{3}}\] done
clear
B)
\[C{{H}_{3}}Cl\] done
clear
C)
\[C{{H}_{3}}C{{H}_{3}}\] done
clear
D)
\[C{{H}_{3}}C{{H}_{2}}C{{H}_{3}}\] done
clear
View Solution play_arrow
question_answer 27)
Which of the following has the highest boiling point [DPMT 1986]
A)
Neopentane done
clear
B)
n-butane done
clear
C)
n-heptane done
clear
D)
Isobutane done
clear
View Solution play_arrow
question_answer 28)
Which gives \[C{{H}_{4}}\] when treated with water [CPMT 1974, 79; NCERT 1976; IIT-JEE 1990]
A)
Silicon carbide done
clear
B)
Calcium carbide done
clear
C)
Aluminium carbide done
clear
D)
Iron carbide done
clear
View Solution play_arrow
question_answer 29)
Which of the following does not react with \[PC{{l}_{5}}\] [CPMT 1973]
A)
\[C{{H}_{3}}OH\] done
clear
B)
\[C{{H}_{3}}COOH\] done
clear
C)
\[C{{H}_{3}}CHO\] done
clear
D)
\[{{C}_{2}}{{H}_{6}}\] done
clear
View Solution play_arrow
question_answer 30)
Which of the following compounds is insoluble even in hot concentrated \[{{H}_{2}}S{{O}_{4}}\] [IIT-JEE 1983]
A)
Ethylene done
clear
B)
Benzene done
clear
C)
Hexane done
clear
D)
Aniline done
clear
View Solution play_arrow
question_answer 31)
A reaction between methyl magnesium bromide and ethyl alcohol gives [CPMT 1979; MNR 1986; UPSEAT 1999]
A)
Methane done
clear
B)
Ethane done
clear
C)
Propane done
clear
D)
Butane done
clear
View Solution play_arrow
question_answer 32)
Methane and ethane both can be obtained in single step from [CPMT 1974; MP PET 1995; AFMC 1998, 2000; BHU 2005]
A)
\[C{{H}_{3}}I\] done
clear
B)
\[{{C}_{2}}{{H}_{5}}I\] done
clear
C)
\[C{{H}_{3}}OH\] done
clear
D)
\[{{C}_{2}}{{H}_{5}}OH\] done
clear
View Solution play_arrow
question_answer 33)
Paraffin wax is [MP PMT 1986; CPMT 1993]
A)
Ester done
clear
B)
Alcohol done
clear
C)
Unsaturated hydrocarbon done
clear
D)
Saturated hydrocarbon done
clear
View Solution play_arrow
question_answer 34)
The number of possible enantiomeric pairs that can be produced during monochlorination of 2-methylbutane is [IIT-JEE 1997]
A)
2 done
clear
B)
3 done
clear
C)
4 done
clear
D)
1 done
clear
View Solution play_arrow
question_answer 35)
Petroleum consists mainly of [CPMT 1985, 94; KCET 1991]
A)
Aliphatic hydrocarbons done
clear
B)
Aromatic hydrocarbons done
clear
C)
Aliphatic alcohols done
clear
D)
None of these done
clear
View Solution play_arrow
question_answer 36)
Petroleum ether can be used as
A)
Solvent for fat, oil, varnish and rubber done
clear
B)
As a fuel done
clear
C)
Both A and B done
clear
D)
None of these done
clear
View Solution play_arrow
question_answer 37)
Which of the following are produced from coaltar [MNR 1987; UPSEAT 2002]
A)
Synthetic dyes done
clear
B)
Drugs done
clear
C)
Perfumes done
clear
D)
All the three done
clear
View Solution play_arrow
question_answer 38)
In alkanes, the bond angle is [MP PMT 1989; BHU 1996]
A)
\[{{109.5}^{o}}\] done
clear
B)
\[{{109}^{o}}\] done
clear
C)
\[{{120}^{o}}\] done
clear
D)
\[{{180}^{o}}\] done
clear
View Solution play_arrow
question_answer 39)
In the preparation of alkanes; a concentrated aqueous solution of sodium or potassium salts of saturated carboxylic acid are subjected to [CPMT 1985; MP PET 1999]
A)
Hydrolysis done
clear
B)
Oxidation done
clear
C)
Hydrogenation done
clear
D)
Electrolysis done
clear
View Solution play_arrow
question_answer 40)
Halogenation of alkanes is an example of [MP PET 1993; KCET 1998]
A)
Electrophilic substitution done
clear
B)
Nucleophilic substitution done
clear
C)
Free-radical substitution done
clear
D)
Oxidation done
clear
View Solution play_arrow
question_answer 41)
Propionic acid is subjected to reduction with hydroiodic acid in the presence of a little P, the product formed is [JIPMER 1997]
A)
Ethane done
clear
B)
Propane done
clear
C)
Butane done
clear
D)
None of these done
clear
View Solution play_arrow
question_answer 42)
When ethyl iodide and propyl iodide react with Na in the presence of ether, they form [BHU 1997]
A)
One alkane done
clear
B)
Two alkanes done
clear
C)
Four alkanes done
clear
D)
Three alkanes done
clear
View Solution play_arrow
question_answer 43)
The alkane that yields two isomeric monobromo derivatives is [EAMCET 1997]
A)
Neopentane done
clear
B)
Ethane done
clear
C)
Methane done
clear
D)
Propane done
clear
View Solution play_arrow
question_answer 44)
Kerosene is a mixture of [CPMT 1979; AFMC 1992]
A)
Alkanes done
clear
B)
Aromatic compounds done
clear
C)
Alcohols done
clear
D)
Aliphatic acids done
clear
View Solution play_arrow
question_answer 45)
When petroleum is heated the vapours contain mainly [CPMT 1981]
A)
Kerosene done
clear
B)
Petroleum ether done
clear
C)
Diesel done
clear
D)
Machine oil done
clear
View Solution play_arrow
question_answer 46)
Iso-octane is mixed to the petrol [NCERT 1972]
A)
To precipitate inorganic substances done
clear
B)
To prevent freezing of petrol done
clear
C)
To increase boiling point of petrol done
clear
D)
As an antiknock done
clear
View Solution play_arrow
question_answer 47)
Tetraethyl lead is used as [NCERT 1976, 79; DPMT 1984; CPMT 1989, 91; BHU 1995]
A)
Fire extinguisher done
clear
B)
Pain reliever done
clear
C)
Petroleum additive done
clear
D)
Mosquito repellent done
clear
View Solution play_arrow
question_answer 48)
Cyclohexane, a hydrocarbon floats on water because [NCERT 1976]
A)
It is immiscible with water done
clear
B)
Its density is low as compared to water done
clear
C)
It is non-polar substance done
clear
D)
It is immiscible and lighter than water done
clear
View Solution play_arrow
question_answer 49)
Natural gas contains mainly [MNR 1990; UPSEAT 1999, 2000, 01, 02; BCECE 2005]
A)
Methane done
clear
B)
n-butane done
clear
C)
n-octane done
clear
D)
Mixture of octane done
clear
View Solution play_arrow
question_answer 50)
Which compound is not inflammable [MP PET 2001]
A)
\[CC{{l}_{4}}\] done
clear
B)
\[{{C}_{2}}{{H}_{5}}OH\] done
clear
C)
\[C{{H}_{4}}\] done
clear
D)
\[{{C}_{6}}{{H}_{6}}\] done
clear
View Solution play_arrow
question_answer 51)
Propane is obtained from propene, by which of the following methods [CBSE PMT 2001; AFMC 2001]
A)
Wurtz reaction done
clear
B)
Dehydrogenation done
clear
C)
Frankland reaction done
clear
D)
Catalytic hydrogenation done
clear
View Solution play_arrow
question_answer 52)
The organic compound used as antiknock agent in petroleum is [DCE 1999; CPMT 2000; Pb. CET 2000; MP PET 2001]
A)
\[{{({{C}_{2}}{{H}_{5}})}_{4}}Pb\] done
clear
B)
TNT done
clear
C)
\[C{{H}_{3}}MgBr\] done
clear
D)
\[{{({{C}_{2}}{{H}_{5}})}_{2}}Hg\] done
clear
View Solution play_arrow
question_answer 53)
In catalytic reduction of hydrocarbons which catalyst is mostly used [DCE 2001]
A)
Pt /Ni done
clear
B)
Pd done
clear
C)
\[Si{{O}_{2}}\] done
clear
D)
Misch Metal done
clear
View Solution play_arrow
question_answer 54)
Ethylene reacts with bromine to form [MP PET 2001]
A)
\[Br-C{{H}_{2}}-C{{H}_{3}}\] done
clear
B)
\[C{{H}_{3}}-CB{{r}_{3}}\] done
clear
C)
\[Br-C{{H}_{2}}-C{{H}_{2}}Br\] done
clear
D)
\[CHB{{r}_{3}}\] done
clear
View Solution play_arrow
question_answer 55)
Gasoline is obtained from crude petroleum oil by its [MP PMT 1999]
A)
Fractional distillation done
clear
B)
Vacuum distillation done
clear
C)
Steam distillation done
clear
D)
Pyrolysis done
clear
View Solution play_arrow
question_answer 56)
Which of the following does not give alkane [MP PMT 1999]
A)
Reaction of \[C{{H}_{3}}I\] with Na in ether done
clear
B)
Reaction of sodium acetate with sodalime done
clear
C)
Electrolysis of concentrated sodium acetate solution done
clear
D)
Reaction of ethyl chloride with alco. KOH done
clear
View Solution play_arrow
question_answer 57)
LPG is a mixture of [MP PMT 1999; KCET 2005]
A)
\[{{C}_{6}}{{H}_{12}}+{{C}_{6}}{{H}_{6}}\] done
clear
B)
\[{{C}_{4}}{{H}_{10}}+{{C}_{3}}{{H}_{8}}\] done
clear
C)
\[{{C}_{2}}{{H}_{4}}+{{C}_{2}}{{H}_{2}}\] done
clear
D)
\[{{C}_{2}}{{H}_{4}}+C{{H}_{4}}\] done
clear
View Solution play_arrow
question_answer 58)
Carbon black, which is used in making printer's ink, is obtained by decomposition of [MP PET 1993]
A)
Acetylene done
clear
B)
Benzene done
clear
C)
Carbon tetrachloride done
clear
D)
Methane done
clear
View Solution play_arrow
question_answer 59)
The addition of tetraethyl lead to petrol [MP PET 1993]
A)
Lowers its octane number done
clear
B)
Raises its octane number done
clear
C)
May raise or lower the octane number done
clear
D)
Has no effect on octane number done
clear
View Solution play_arrow
question_answer 60)
Which of the following compound has maximum boiling point [IIT-JEE 1982; MP PMT 1986; MADT Bihar 1995; Pb. PMT 1999]
A)
n-hexane done
clear
B)
n-pentane done
clear
C)
2, 2-dimethyl propane done
clear
D)
2-methyl butane done
clear
View Solution play_arrow
question_answer 61)
Knocking sound occurs in engine when fuel [CPMT 1981]
A)
Ignites slowly done
clear
B)
Ignites rapidly done
clear
C)
Contains water done
clear
D)
Is mixed with machine oil done
clear
View Solution play_arrow
question_answer 62)
Petroleum is mainly a mixture of [CPMT 1984; Pb. PMT 1999]
A)
Alkanes done
clear
B)
Cyclohexane done
clear
C)
Benzenoid hydrocarbons done
clear
D)
Alkenes done
clear
View Solution play_arrow
question_answer 63)
Which of the following has maximum boiling point [IIT-JEE 1986; MP PMT 1986; CPMT 1989]
A)
iso-octane done
clear
B)
n-octane done
clear
C)
2, 2, 3, 3-tetramethyl butane done
clear
D)
n-butane done
clear
View Solution play_arrow
question_answer 64)
Aqueous solution of the following compound on electrolysis gives ethane [NCERT 1983; MP PET 1985; CPMT 1975, 79]
A)
Acetic acid done
clear
B)
Acetamide done
clear
C)
Potassium acetate done
clear
D)
Ethyl acetate done
clear
View Solution play_arrow
question_answer 65)
Which of the following does not decolourise bromine solution in carbon disulphide [MP PET 1986]
A)
Acetylene done
clear
B)
Propene done
clear
C)
Ethane done
clear
D)
Propyne done
clear
View Solution play_arrow
question_answer 66)
Anhydrous sodium acetate on heating with sodalime gives [CPMT 1972, 84; Pb. CET 2001, 2003]
A)
Acetic acid done
clear
B)
Methane done
clear
C)
Calcium acetate done
clear
D)
Ethane done
clear
View Solution play_arrow
question_answer 67)
Water gas is [CPMT 1993, 2004; Pb. PMT 2004]
A)
\[CO+C{{O}_{2}}\] done
clear
B)
\[CO+{{N}_{2}}\] done
clear
C)
\[CO+{{H}_{2}}\] done
clear
D)
\[CO+{{N}_{2}}+{{H}_{2}}\] done
clear
View Solution play_arrow
question_answer 68)
A sample of gasoline contains 81% iso-octane and 19% n-heptane. Its octane number will be [MP PMT 1995]
A)
19 done
clear
B)
81 done
clear
C)
100 done
clear
D)
62 done
clear
View Solution play_arrow
question_answer 69)
The natural petroleum contains [MP PMT 1995]
A)
Saturated hydrocarbons done
clear
B)
Cyclic saturated hydrocarbons done
clear
C)
Compounds of sulphur done
clear
D)
All of these done
clear
View Solution play_arrow
question_answer 70)
The preparation of ethane by electrolysis of aqueous solution of potassium acetate is called as [MP PMT 1995]
A)
Wurtz reaction done
clear
B)
Sabatier-Senderen's reaction done
clear
C)
Kolbe's synthesis done
clear
D)
Grignard reaction done
clear
View Solution play_arrow
question_answer 71)
Action of hydrogen chloride on \[\underset{\,\,\,\,\,C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C{{H}_{3}}-C=C{{H}_{2}}}}\,}}\,\] and on \[CH\equiv CH\] will predominantly give the compounds, respectively
A)
\[\underset{C{{H}_{3}}\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-CH=C{{H}_{2}}Cl}}\,}}\,\] and \[C{{H}_{2}}Cl-C{{H}_{2}}Cl\] done
clear
B)
\[\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-CCl=C{{H}_{3}}}}\,}}\,\] and \[C{{H}_{3}}-CHC{{l}_{2}}\] done
clear
C)
\[\underset{C{{H}_{3}}\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-CH=C{{H}_{2}}Cl}}\,}}\,\] and \[C{{H}_{3}}-CHC{{l}_{2}}\] done
clear
D)
\[\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-CH=C{{H}_{3}}}}\,}}\,\] and \[C{{H}_{2}}Cl-C{{H}_{2}}Cl\] done
clear
View Solution play_arrow
question_answer 72)
As the number of carbon atoms in a chain increases the boiling point of alkanes [AFMC 1989]
A)
Increases done
clear
B)
Decreases done
clear
C)
Remains same done
clear
D)
May increase or decrease done
clear
View Solution play_arrow
question_answer 73)
In the fractional distillation of crude petroleum [Roorkee 1989]
A)
Petrol condenses at the bottom of the column done
clear
B)
The gases condense at the top of the column done
clear
C)
High boiling constituents condense at the bottom of the column done
clear
D)
High boiling constituents condense at the top of the column done
clear
View Solution play_arrow
question_answer 74)
Which of the following is not an endothermic reaction [J & K 2005]
A)
Dehydrogenation done
clear
B)
Ethane to ethene done
clear
C)
Combustion of propane done
clear
D)
Change of chlorine molecule into chlorine atoms. done
clear
View Solution play_arrow
question_answer 75)
Gasoline is the name of [Roorkee 1989]
A)
Crude oil done
clear
B)
The gaseous constituents of petroleum done
clear
C)
The mixture of uncondensed gases produced in the distillation of crude oil done
clear
D)
The mixture of the residue and gas oil obtained in the distillation of crude oil done
clear
View Solution play_arrow
question_answer 76)
In the process of cracking [Roorkee 1989]
A)
Organic compounds decompose into their constituent elements done
clear
B)
Hydrocarbons decompose into carbon and hydrogen done
clear
C)
High molecular weight organic compounds decompose to give low molecular weight organic compounds done
clear
D)
Hydrocarbons yield alkyl radicals and hydrogen done
clear
View Solution play_arrow
question_answer 77)
Octane number has 0 value for [Roorkee 1989; MP PET 1999, 2002; MP PMT 2001; KCET 2002]
A)
iso-octane done
clear
B)
n-hexane done
clear
C)
n-heptane done
clear
D)
iso-heptane done
clear
View Solution play_arrow
question_answer 78)
Dry distillation of sodium propanoate with sodalime gives [CPMT 1996]
A)
Propane done
clear
B)
Propene done
clear
C)
Ethane done
clear
D)
Ethene done
clear
View Solution play_arrow
question_answer 79)
What is the chief product obtained when n-butane is treated with bromine in the presence of light at \[{{130}^{o}}C\] [IIT-JEE 1995]
A)
\[\underset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{{H}_{3}}}{\mathop{\underset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|}{\mathop{C{{H}_{3}}-C{{H}_{2}}-CH-Br}}\,}}\,\] done
clear
B)
\[\underset{C{{H}_{3}}\,\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-CH-C{{H}_{2}}-Br}}\,}}\,\] done
clear
C)
\[\underset{\,\,\,\,\,\,\,\,\,C{{H}_{3}}}{\mathop{\underset{\,\,\,\,|}{\mathop{\overset{\,\,\,\,\,\,\,\,\,\,\,C{{H}_{3}}}{\mathop{\overset{\,\,\,\,\,\,|}{\mathop{C{{H}_{3}}-C-Br}}\,}}\,}}\,}}\,\] done
clear
D)
\[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-Br\] done
clear
View Solution play_arrow
question_answer 80)
A mixture of propene and methane is obtained by the cracking of
A)
1-butene done
clear
B)
2-butene done
clear
C)
n-butane done
clear
D)
Isobutane done
clear
View Solution play_arrow
question_answer 81)
Which of the following fractions of petroleum refining contains kerosene ? (Boiling ranges in \[^{o}C\] are given below)
A)
40 - 80 done
clear
B)
80 - 200 done
clear
C)
200 - 300 done
clear
D)
Above 300 done
clear
View Solution play_arrow
question_answer 82)
Which of the following statements is incorrect ? The members of the homologous series of alkanes [NCERT 1974]
A)
Are all straight chain compounds done
clear
B)
Have the general formula \[{{C}_{n}}{{H}_{2n+2}}\] done
clear
C)
Have similar chemical properties done
clear
D)
Show a regular gradation of physical properties done
clear
View Solution play_arrow
question_answer 83)
On mixing tetraethyl lead to gasoline available at petrol pumps [CPMT 1981]
A)
Calorific value of the fuel increases done
clear
B)
Odour diminishes done
clear
C)
Less smoke is obtained on combustion done
clear
D)
Antiknock property of fuel increases done
clear
View Solution play_arrow
question_answer 84)
A liquid hydrocarbon can be converted to gaseous hydrocarbon by [CPMT 1980; MP PMT 2001]
A)
Cracking done
clear
B)
Hydrolysis done
clear
C)
Oxidation done
clear
D)
Distillation under reduced pressure done
clear
View Solution play_arrow
question_answer 85)
The tetrahedral nature of carbon was first given by [MP PMT 1994]
A)
Kekule done
clear
B)
Le Bell and Van't Hoff done
clear
C)
Pauling done
clear
D)
Armstrong and Bayer done
clear
View Solution play_arrow
question_answer 86)
Formation of alkane by the action of Zn on alkyl halide is called [DPMT 1984; MHCET 2004]
A)
Frankland's reaction done
clear
B)
Wurtz reaction done
clear
C)
Cannizzaro reaction done
clear
D)
Kolbe's reaction done
clear
View Solution play_arrow
question_answer 87)
Which of the following compounds will form a hydrocarbon on reaction with Grignard reagent [CPMT 1988, 93]
A)
\[C{{H}_{3}}C{{H}_{2}}OH\] done
clear
B)
\[C{{H}_{3}}CHO\] done
clear
C)
\[C{{H}_{3}}COC{{H}_{3}}\] done
clear
D)
\[C{{H}_{3}}C{{O}_{2}}C{{H}_{2}}\] done
clear
View Solution play_arrow
question_answer 88)
Name the hydrocarbon that is a liquid at STP
A)
Ethane done
clear
B)
Propane done
clear
C)
n-butane done
clear
D)
n-pentane done
clear
View Solution play_arrow
question_answer 89)
Which statement is not true concerning alkanes [MP PET 2003]
A)
Large number alkanes are soluble in water done
clear
B)
All alkanes have a lower density than water done
clear
C)
At room temperature some alkanes are liquids, some solids and some gases done
clear
D)
All alkanes burn done
clear
View Solution play_arrow
question_answer 90)
Fischer Tropsch process is used for the manufacture of [DCE 1999; MP PET 2003]
A)
Synthetic petrol done
clear
B)
Thermosetting plastics done
clear
C)
Ethanol done
clear
D)
Benzene done
clear
View Solution play_arrow
question_answer 91)
Which one of the following compounds cannot be prepared by Wurtz reaction [Kurukshetra CEE 2002; MP PMT 2002; MP PET 2003]
A)
\[C{{H}_{4}}\] done
clear
B)
\[{{C}_{2}}{{H}_{6}}\] done
clear
C)
\[{{C}_{3}}{{H}_{8}}\] done
clear
D)
\[{{C}_{4}}{{H}_{10}}\] done
clear
View Solution play_arrow
question_answer 92)
A fuel contains 25 % n-heptane and 75 % iso-octane. Its octane number is [MP PMT 1993; MP PET 1994]
A)
50 done
clear
B)
75 done
clear
C)
100 done
clear
D)
25 done
clear
View Solution play_arrow
question_answer 93)
Sodium ethoxide is a specific reagent for [CPMT 1985]
A)
Dehydration done
clear
B)
Dehydrogenation done
clear
C)
Dehydrohalogenation done
clear
D)
Dehalogenation done
clear
View Solution play_arrow
question_answer 94)
Which of the following has highest percentage of hydrogen [CPMT 1975; 79]
A)
\[C{{H}_{4}}\] done
clear
B)
\[{{C}_{2}}{{H}_{4}}\] done
clear
C)
\[{{C}_{6}}{{H}_{6}}\] done
clear
D)
\[{{C}_{2}}{{H}_{2}}\] done
clear
View Solution play_arrow
question_answer 95)
What is the molecular formula of the alkane, the 5.6 litre of which weight 11 g at STP [MP PMT 2003]
A)
\[{{C}_{6}}{{H}_{14}}\] done
clear
B)
\[{{C}_{4}}{{H}_{10}}\] done
clear
C)
\[{{C}_{3}}{{H}_{8}}\] done
clear
D)
\[{{C}_{2}}{{H}_{6}}\] done
clear
View Solution play_arrow
question_answer 96)
The reference compound `iso-octane' which is used in determining the octane number of gasoline has the structure
A)
\[C{{H}_{3}}-CH(C{{H}_{3}})-CH(C{{H}_{3}})-CH(C{{H}_{3}})-C{{H}_{3}}\] done
clear
B)
\[C{{H}_{3}}-C{{(C{{H}_{3}})}_{2}}-C{{H}_{2}}-CH(C{{H}_{3}})-C{{H}_{3}}\] done
clear
C)
\[C{{H}_{3}}-C{{(C{{H}_{3}})}_{2}}-CH(C{{H}_{3}})-C{{H}_{2}}-C{{H}_{3}}\] done
clear
D)
\[C{{H}_{3}}-C{{(C{{H}_{3}})}_{2}}-C{{(C{{H}_{3}})}_{2}}-C{{H}_{3}}\] done
clear
View Solution play_arrow
question_answer 97)
Sample of 2, 3-dibromo-3-methylpentane is heated with zinc dust. The resulting product is isolated and heated with HI in the presence of phosphorus. Indicate which is the structure that represent the final organic product formed in the reaction [CBSE PMT 1991]
A)
\[\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-C{{H}_{2}}-CH-C{{H}_{2}}-C{{H}_{3}}}}\,}}\,\] done
clear
B)
\[\overset{\,\,C{{H}_{3}}}{\mathop{\overset{|\,\,\,\,\,\,\,}{\mathop{C{{H}_{2}}=CH-CH-C{{H}_{2}}-C{{H}_{3}}}}\,}}\,\] done
clear
C)
\[\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}-CHI-CH-C{{H}_{2}}-C{{H}_{3}}}}\,}}\,\] done
clear
D)
\[\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,\,\,}{\mathop{C{{H}_{2}}=CH-C(I)-C{{H}_{2}}-C{{H}_{3}}}}\,}}\,\] done
clear
View Solution play_arrow
question_answer 98)
The order of appearance of the following with rising temperature during the refining of crude oil is [MNR 1993; UPSEAT 2002]
A)
Kerosene oil, gasoline, diesel done
clear
B)
Diesel, gasoline, kerosene oil done
clear
C)
Gasoline, diesel, kerosene oil done
clear
D)
Gasoline, kerosene oil, diesel done
clear
View Solution play_arrow
question_answer 99)
When sodium propionate is heated with soda lime, the main product is [AMU 2002]
A)
Ethane done
clear
B)
Methane done
clear
C)
Propane done
clear
D)
Butane done
clear
View Solution play_arrow
question_answer 100)
Gasoline is a mixture of alkanes with the number of carbon atoms [CPMT 1983, 84; BVP 2003]
A)
\[{{C}_{3}}-{{C}_{5}}\] done
clear
B)
\[{{C}_{5}}-{{C}_{6}}\] done
clear
C)
\[{{C}_{6}}-{{C}_{8}}\] done
clear
D)
\[{{C}_{7}}-{{C}_{9}}\] done
clear
View Solution play_arrow
question_answer 101)
The final product of complete oxidation of hydrocarbons is [CPMT 1981]
A)
Acid done
clear
B)
Aldehyde done
clear
C)
\[{{H}_{2}}O+C{{O}_{2}}\] done
clear
D)
Dihydric alcohol done
clear
View Solution play_arrow
question_answer 102)
Which of the following will have least hindered rotation about carbon-carbon bond [IIT-JEE 1987; CPMT 1989, 94]
A)
Ethane done
clear
B)
Ethylene done
clear
C)
Acetylene done
clear
D)
Hexachloroethane done
clear
View Solution play_arrow
question_answer 103)
Which of the following represents the most oxidized form of hydrocarbon [MP PMT/PET 1988]
A)
\[C{{O}_{2}}\] done
clear
B)
\[RCHO\] done
clear
C)
\[RCOOH\] done
clear
D)
RCOOOH done
clear
View Solution play_arrow
question_answer 104)
Name the reaction \[{{C}_{10}}{{H}_{22}}\xrightarrow{900K}{{C}_{4}}{{H}_{8}}+{{C}_{6}}{{H}_{14}}\] [MP PET 1995; MP PMT 1997]
A)
Alkylation done
clear
B)
Cracking done
clear
C)
Pyrolysis done
clear
D)
Fractionation done
clear
View Solution play_arrow
question_answer 105)
How many types of carbon atoms are present in 2, 2, 3-trimethylpentane
A)
One done
clear
B)
Two done
clear
C)
Three done
clear
D)
Four done
clear
View Solution play_arrow
question_answer 106)
Which one gives only one monosubstitution product on chlorination [AIEEE 2003]
A)
n-pentane done
clear
B)
Neopentane done
clear
C)
Isopentane done
clear
D)
n-butane done
clear
View Solution play_arrow
question_answer 107)
\[C{{H}_{4}}\] is formed when [AFMC 1987]
A)
Sodium acetate is heated with sodalime done
clear
B)
Iodomethane is reduced done
clear
C)
Aluminium carbide reacts with water done
clear
D)
All of these done
clear
View Solution play_arrow
question_answer 108)
A mixture of methane, ethylene and acetylene gases is passed through a Wolf's bottle containing ammoniacal cuprous chloride. The gas coming out is [NCERT 1976]
A)
Methane done
clear
B)
Acetylene done
clear
C)
A mixture of methane and ethylene done
clear
D)
The original mixture done
clear
View Solution play_arrow
question_answer 109)
At room temperature solid paraffin is [RPET/PMT 1999]
A)
\[{{C}_{3}}{{H}_{8}}\] done
clear
B)
\[{{C}_{8}}{{H}_{18}}\] done
clear
C)
\[{{C}_{4}}{{H}_{10}}\] done
clear
D)
\[{{C}_{20}}{{H}_{42}}\] done
clear
View Solution play_arrow
question_answer 110)
Which one of the following compounds does not give addition reactions [MADT Bihar 1981]
A)
Aldehydes done
clear
B)
Alkanes done
clear
C)
Alkenes done
clear
D)
Alkynes done
clear
E)
Ketones done
clear
F)
All of these done
clear
View Solution play_arrow
question_answer 111)
The most important method of preparation of hydrocarbons of lower carbon number is [CBSE PMT 1989]
A)
Pyrolysis of higher carbon number hydrocarbons done
clear
B)
Electrolysis of salts of fatty acids done
clear
C)
Sabatier and Senderen's reaction done
clear
D)
Direct synthesis done
clear
View Solution play_arrow
question_answer 112)
The inorganic origin of petroleum is indicated by the fact that [Roorkee 1990]
A)
Its constituents can be separated by fractional distillation done
clear
B)
Carbon and hydrocarbon can combine by absorption of solar energy to give hydrocarbons done
clear
C)
Petroleum contains traces of chlorophyll done
clear
D)
Oil fields are located with the help of seismograph done
clear
View Solution play_arrow
question_answer 113)
Which of the following is a gemdihalide [CPMT 1976, 88]
A)
\[C{{H}_{3}}.CHBr.CHBr.C{{H}_{3}}\] done
clear
B)
\[C{{H}_{2}}Br.C{{H}_{2}}Br\] done
clear
C)
\[CHBr=CHBr\] done
clear
D)
\[C{{H}_{3}}CHB{{r}_{2}}\] done
clear
View Solution play_arrow
question_answer 114)
Which one of the following contain isopropyl group [BHU 2005]
A)
2,2,3,3-tetramethylpentane done
clear
B)
2-methylpentane done
clear
C)
2,2,3-trimethylpentane done
clear
D)
3,3-dimethylpentane done
clear
View Solution play_arrow
question_answer 115)
Natural gas is a mixture of [MP PMT 1986]
A)
\[CO+C{{O}_{2}}\] done
clear
B)
\[CO+{{N}_{2}}\] done
clear
C)
\[CO+{{H}_{2}}+C{{H}_{4}}\] done
clear
D)
\[C{{H}_{4}}+{{C}_{2}}{{H}_{6}}+{{C}_{3}}{{H}_{8}}\] done
clear
View Solution play_arrow
question_answer 116)
By Wurtz reaction, a mixture of methyliodide and ethyliodide gives [BHU 2003]
A)
Butane done
clear
B)
Ethane done
clear
C)
Propane done
clear
D)
A mixture of the above three done
clear
View Solution play_arrow
question_answer 117)
Product obtained by nitration of propane is [RPMT 2003]
A)
Nitropropane done
clear
B)
Nitromethane done
clear
C)
Nitroethane done
clear
D)
All of these done
clear
View Solution play_arrow
question_answer 118)
Isomerism in saturated hydrocarbons is due to
A)
Change in the valence of carbon done
clear
B)
Change in the ratio of elements in compounds done
clear
C)
Formation of branches in the chain of C atoms done
clear
D)
Formation of double bond done
clear
View Solution play_arrow
question_answer 119)
Photochemical chlorination of alkane is initiated by a process of [DPMT 1985; NCERT 1978]
A)
Pyrolysis done
clear
B)
Substitution done
clear
C)
Homolysis done
clear
D)
Peroxidation done
clear
View Solution play_arrow
question_answer 120)
Which of the following is not linked with methane
A)
Marsh gas done
clear
B)
Natural gas done
clear
C)
Producer gas done
clear
D)
Coal gas done
clear
View Solution play_arrow
question_answer 121)
Which of the following has highest octane number [MP PET 1996]
A)
n-hexane done
clear
B)
n-heptane done
clear
C)
Iso-octane done
clear
D)
n-heptane and iso-octane mixed in ratio 50 : 50 done
clear
View Solution play_arrow
question_answer 122)
A mixture of ethyl iodide and n-propyl iodide is subjected to Wurtz reaction. The hydrocarbon that will not be formed is [IIT-JEE (Screening) 1990]
A)
n-butane done
clear
B)
n-propane done
clear
C)
n-pentane done
clear
D)
n-hexane done
clear
View Solution play_arrow
question_answer 123)
Most of the hydrocarbons from petroleum are obtained by [CPMT 1974, 80]
A)
Fractional distillation done
clear
B)
Fractional crystallization done
clear
C)
Vaporization done
clear
D)
Polymerization done
clear
View Solution play_arrow
question_answer 124)
Which is the best antiknock compound or Which one of the following substances is used as an antiknock compound [CPMT 1974, 81, 99, 2000;RPMT 2002; CBSE PMT 1996; KCET (Med.) 2000 MP PET 1985, 87, 97, 2001; MP PMT 1994, 96; AIIMS 2000]
A)
Lead tetrachloride done
clear
B)
Lead acetate done
clear
C)
Zinc ethyl done
clear
D)
Tetraethyl lead (TEL) done
clear
View Solution play_arrow
question_answer 125)
In the dichlorination reaction of propane, mixture of products are obtained. How many isomers, the mixture contains [Orissa JEE 2003]
A)
2 done
clear
B)
3 done
clear
C)
4 done
clear
D)
5 done
clear
View Solution play_arrow
question_answer 126)
Which of the following cycloalkane gives open chain compound, when reacts with bromine [Orissa JEE 2003]
A)
Cyclopropane done
clear
B)
Cyclopentane done
clear
C)
Cyclohexane done
clear
D)
Cyclo-octane done
clear
View Solution play_arrow
question_answer 127)
Grignard reagent is not prepared in aqueous medium but prepared; in ether medium because the reagent [KCET 2002]
A)
Reacts with water done
clear
B)
Is insoluble in water done
clear
C)
Is highly reactive in ether done
clear
D)
Becomes inactive in water done
clear
View Solution play_arrow
question_answer 128)
A sample of petrol is a mixture of 30% n-heptane and 70% iso-octane. The sample has octane number [MP PET 1985]
A)
30 done
clear
B)
70 done
clear
C)
15 done
clear
D)
35 done
clear
View Solution play_arrow
question_answer 129)
For the reduction of ketones to hydrocarbon, the appropriate agent is [DPMT 2002]
A)
\[HI\] done
clear
B)
\[Zn-Hg/HCl\] done
clear
C)
Red phosphorous done
clear
D)
\[{{H}_{2}}S{{O}_{4}}\] done
clear
View Solution play_arrow
question_answer 130)
Heating of alkanes with fuming sulphuric acid or oleum at high temperature, which forms sulphonic acid, is called [MH CET 1999]
A)
Nitration done
clear
B)
Halogenation done
clear
C)
Sulphonation done
clear
D)
Oxidation done
clear
View Solution play_arrow
question_answer 131)
Propane is obtained from propene by which method? [CPMT 1997; CBSE PMT 2001; AFMC 2001; MH CET 2001]
A)
Catalyst hydrogenation done
clear
B)
Wurtz reaction done
clear
C)
Dehydrogenation done
clear
D)
Frankland reaction done
clear
View Solution play_arrow
question_answer 132)
B.P. of branched chain alkanes as compared to straight chain alkanes are [MP PMT 1987; AIIMS 1999]
A)
Lower done
clear
B)
Equal done
clear
C)
Higher done
clear
D)
Independent of the chain done
clear
View Solution play_arrow
question_answer 133)
Daily use candles (paraffin wax) contain [CPMT 1996]
A)
Higher saturated hydrocarbon done
clear
B)
Lower saturated hydrocarbon done
clear
C)
Higher unsaturated hydrocarbon done
clear
D)
Lower unsaturated hydrocarbon done
clear
View Solution play_arrow
question_answer 134)
The reaction \[C{{H}_{4}}+C{{l}_{2}}\underset{{}}{\mathop{\xrightarrow{\text{uv light}}}}\,C{{H}_{3}}Cl+HCl\] is an example of [CBSE PMT 1999, 2002]
A)
Addition reactions done
clear
B)
Substitution reaction done
clear
C)
Elimination reaction done
clear
D)
Rearrangement reaction done
clear
View Solution play_arrow
question_answer 135)
Normal butane convert into isobutane by [RPMT 2002]
A)
\[LiAl{{H}_{4}}\] done
clear
B)
\[AlC{{l}_{3}}\] done
clear
C)
\[NaB{{H}_{4}}\] done
clear
D)
\[Zn/HCl\] done
clear
View Solution play_arrow
question_answer 136)
Alcoholic solution of KOH is used for [CPMT 1982, 86; IIT-JEE 1990]
A)
Dehydration done
clear
B)
Dehydrogenation done
clear
C)
Dehydrohalogenation done
clear
D)
Dehalogenation done
clear
View Solution play_arrow
question_answer 137)
Aluminium carbide on reacting with water gives [NCERT 1981; MP PET 1985]
A)
Methane done
clear
B)
Ethane done
clear
C)
Ethene done
clear
D)
Ethyne done
clear
View Solution play_arrow
question_answer 138)
Maximum carbon-carbon bond distance is found in [MP PMT 1987; IIT-JEE 1981; Bihar MEE 1995]
A)
Ethyne done
clear
B)
Ethene done
clear
C)
Ethane done
clear
D)
Benzene done
clear
View Solution play_arrow
question_answer 139)
Which of the following reaction is expected to readily give a hydrocarbon product in good yields [CBSE PMT 1997]
A)
\[RCOOK\xrightarrow{\text{Oxidation Electrolysis}}\] done
clear
B)
\[RCOOAg\xrightarrow{{{I}_{2}}}\] done
clear
C)
\[C{{H}_{3}}-C{{H}_{3}}\underset{hv}{\mathop{\xrightarrow{C{{l}_{2}}}}}\,\] done
clear
D)
\[{{(C{{H}_{3}})}_{2}}CCl\xrightarrow{{{C}_{2}}{{H}_{5}}OH}\] done
clear
View Solution play_arrow
question_answer 140)
Out of the following fractions of petroleum, the one having the lowest boiling point is or Which of the following is obtained at lowest temperature by fractional distillation of petroleum [MP PMT 1993; MP PET 1996]
A)
Kerosene done
clear
B)
Diesel oil done
clear
C)
Gasoline done
clear
D)
Heavy oil done
clear
View Solution play_arrow
question_answer 141)
The marsh gas detector used by miners works on the principle of [AMU 1984]
A)
Difference in the rates of diffusion of gases done
clear
B)
Avogadro's hypothesis done
clear
C)
Gay-Lussac's law of gaseous volumes done
clear
D)
Berzelius hypothesis done
clear
View Solution play_arrow
question_answer 142)
Methane can be prepared by [DCE 2001]
A)
Wurtz's reaction done
clear
B)
Decarboxylation done
clear
C)
Hydrogenation reaction done
clear
D)
All of these done
clear
View Solution play_arrow
question_answer 143)
The most strained cycloalkane is [IIT-JEE 1981]
A)
Cyclopropane done
clear
B)
Cyclobutane done
clear
C)
Cyclopentane done
clear
D)
Cyclohexane done
clear
View Solution play_arrow
question_answer 144)
Which does not react with chlorine in dark [Pb. PMT 2000]
A)
\[{{C}_{2}}{{H}_{4}}\] done
clear
B)
\[{{C}_{2}}{{H}_{2}}\] done
clear
C)
\[C{{H}_{4}}\] done
clear
D)
\[C{{H}_{3}}CHO\] done
clear
View Solution play_arrow
question_answer 145)
Main constituent of marsh gas is [IIT-JEE 1980; MP PMT 1994; AFMC 1997]
A)
\[{{C}_{2}}{{H}_{2}}\] done
clear
B)
\[C{{H}_{4}}\] done
clear
C)
\[{{H}_{2}}S\] done
clear
D)
CO done
clear
View Solution play_arrow
question_answer 146)
Which of the following method can be used for the preparation of methane
A)
Wurtz reaction done
clear
B)
Kolbe's reaction done
clear
C)
Reduction of alkyl halide done
clear
D)
Hydrogenation of alkene done
clear
View Solution play_arrow
question_answer 147)
Which hydrocarbon will be most stable [MP PET 2000, 03]
A)
Methane done
clear
B)
Ethane done
clear
C)
Propane done
clear
D)
Butane done
clear
View Solution play_arrow
question_answer 148)
C-H bond length is greatest in [IIT-JEE 1989; MNR 1990; AMU 2002]
A)
\[{{C}_{2}}{{H}_{2}}\] done
clear
B)
\[{{C}_{2}}{{H}_{4}}\] done
clear
C)
\[{{C}_{2}}{{H}_{6}}\] done
clear
D)
\[{{C}_{2}}{{H}_{2}}B{{r}_{2}}\] done
clear
View Solution play_arrow
question_answer 149)
Which one of the following compounds does not form an ozonide [EAMCET 1997]
A)
Ethene done
clear
B)
Propyne done
clear
C)
Propene done
clear
D)
Propane done
clear
View Solution play_arrow
question_answer 150)
Which type of hybridisation occurs in ethylene [CBSE PMT 1991; Bihar MEE 1996; JIPMER 1997]
A)
sp done
clear
B)
\[s{{p}^{2}}\] done
clear
C)
\[s{{p}^{3}}\] done
clear
D)
\[s{{p}^{3}}d\] done
clear
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question_answer 151)
Silver acetylide when heated with \[HCl\] gives
A)
\[{{C}_{2}}{{H}_{2}}\] done
clear
B)
\[{{H}_{2}}\] done
clear
C)
\[{{C}_{2}}{{H}_{4}}\] done
clear
D)
None of these done
clear
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question_answer 152)
When sodium reacts with ethyl iodide, which of the following hydrocarbons is produced [NCERT 1984; BHU 1982]
A)
Methane done
clear
B)
Ethane done
clear
C)
Butane done
clear
D)
Ethene done
clear
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question_answer 153)
Solid methane is [DPMT 1983; CBSE PMT 1989]
A)
Molecular solid done
clear
B)
Ionic solid done
clear
C)
Covalent solid done
clear
D)
Not possible done
clear
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question_answer 154)
The shape of ethane is [Bihar CEE 1995]
A)
Triangular done
clear
B)
Tetrahedral done
clear
C)
Linear done
clear
D)
None of these done
clear
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question_answer 155)
\[C{{H}_{3}}MgI\] will give methane with [Roorkee 1995]
A)
\[{{C}_{2}}{{H}_{5}}OH\] done
clear
B)
\[C{{H}_{3}}-C{{H}_{2}}-N{{H}_{2}}\] done
clear
C)
\[C{{H}_{3}}-CO-C{{H}_{3}}\] done
clear
D)
All of these done
clear
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question_answer 156)
Propane-1-ol can be prepared from propene by its reaction with [MP PMT 2003]
A)
\[C{{H}_{3}}COOH\] done
clear
B)
\[{{H}_{3}}B{{O}_{3}}\] done
clear
C)
\[{{B}_{2}}{{H}_{6}}/NaOH,{{H}_{2}}{{O}_{2}}\] done
clear
D)
\[{{H}_{2}}S{{O}_{4}}/{{H}_{2}}O\] done
clear
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question_answer 157)
The process in which higher hydrocarbons are broken down into lower hydrocarbons by controlled pyrolysis, is called [MP PMT 2002]
A)
Hydrolysis done
clear
B)
Cracking done
clear
C)
Oxidation done
clear
D)
Reduction done
clear
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question_answer 158)
Successive alkanes differ by [MP PMT 2002]
A)
\[>C{{H}_{2}}\] done
clear
B)
\[>CH\] done
clear
C)
\[-\,\,C{{H}_{3}}\] done
clear
D)
\[{{C}_{2}}{{H}_{4}}\] done
clear
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question_answer 159)
General formula of alkane is [EAMCET 1979; Manipal MEE 1995]
A)
\[{{C}_{n}}{{H}_{2n+2}}\] done
clear
B)
\[{{C}_{n}}{{H}_{2n-1}}\] done
clear
C)
\[{{C}_{n}}{{H}_{2n}}\] done
clear
D)
\[{{C}_{n}}{{H}_{2n+1}}\] done
clear
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question_answer 160)
Methane and ethane both can be prepared in one step by which of the following compound [BHU 2004]
A)
\[{{C}_{2}}{{H}_{4}}\] done
clear
B)
\[C{{H}_{3}}O\] done
clear
C)
\[C{{H}_{3}}Br\] done
clear
D)
\[C{{H}_{3}}C{{H}_{2}}OH\] done
clear
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question_answer 161)
Photochemical chlorination of alkane is initiated by a process of [Kerala PMT 2004]
A)
Pyrolysis done
clear
B)
Substitution done
clear
C)
Cracking done
clear
D)
Peroxidation done
clear
E)
Homolysis done
clear
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question_answer 162)
A petroleum fraction having boiling range 70-200°C and containing 6-10 carbon atoms per molecule is called [UPSEAT 2004]
A)
Natural gas done
clear
B)
Gas oil done
clear
C)
Gasoline done
clear
D)
Kerosene done
clear
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question_answer 163)
Producer gas is a mixture of [Pb. CET 2002; UPSEAT 2004]
A)
\[CO\] and \[{{N}_{2}}\] done
clear
B)
\[C{{O}_{2}}\] and \[{{H}_{2}}\] done
clear
C)
\[{{N}_{2}}\] and \[{{O}_{2}}\] done
clear
D)
\[C{{H}_{4}}\] and \[{{N}_{2}}\] done
clear
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question_answer 164)
The highest boiling point is expected for [DEC. 2003]
A)
\[n-\]butane done
clear
B)
iso-octane done
clear
C)
\[n-\]octane done
clear
D)
2,2,3,3-tetramethyl butane done
clear
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question_answer 165)
Which of the following is a good conductor of heat of electricity [Pb. CET 2003]
A)
Diamond done
clear
B)
Graphite done
clear
C)
Anthracite done
clear
D)
Charcoal done
clear
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question_answer 166)
Which one of the following has the minimum boiling point [AIEEE 2004]
A)
1-Butene done
clear
B)
1-Butyne done
clear
C)
n-Butane done
clear
D)
Isobutane done
clear
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question_answer 167)
Octane number can be changed by [AFMC 2004]
A)
Isomerisation done
clear
B)
Alkylation done
clear
C)
Cyclisation done
clear
D)
All of these done
clear
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question_answer 168)
Gasoline has composition [AFMC 2004]
A)
\[{{C}_{8}}-{{C}_{12}}\] done
clear
B)
\[{{C}_{2}}-{{C}_{5}}\] done
clear
C)
\[{{C}_{6}}-{{C}_{11}}\] done
clear
D)
None of these done
clear
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question_answer 169)
The complete combustion of \[C{{H}_{4}}\] gives [BHU 2004]
A)
\[CO+{{H}_{2}}\] done
clear
B)
\[CO+{{N}_{2}}\] done
clear
C)
\[C{{O}_{2}}+{{H}_{2}}O\] done
clear
D)
\[CO+{{N}_{2}}O\] done
clear
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question_answer 170)
Which of the following has highest knocking [UPSEAT 2004]
A)
Olefins done
clear
B)
Branched chain olefins done
clear
C)
Straight chain olefins done
clear
D)
Aromatic hydrocarbons done
clear
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question_answer 171)
Which one of the following compounds gives methane on treatment with water [Kerala PMT 2004; MH CET 2004]
A)
\[A{{l}_{4}}{{C}_{3}}\] done
clear
B)
\[Ca{{C}_{2}}\] done
clear
C)
VC done
clear
D)
\[SiC\] done
clear
E)
\[{{B}_{4}}C\] done
clear
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question_answer 172)
Pick out the alkane which differs from the other members of the group. [KCET 2004]
A)
2,2-dimethyl propane done
clear
B)
Pentane done
clear
C)
2-methyl butane done
clear
D)
2,2-dimethyl butane done
clear
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question_answer 173)
2-Methylbutane on reacting with bromine in the presence of sunlight gives mainly [AIEEE 2005]
A)
1-bromo-2-methylbutane done
clear
B)
2-bromo-2-methylbutane done
clear
C)
2-bromo-3-methylbutane done
clear
D)
1-bromo-3-methylbutane done
clear
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question_answer 174)
Of the five isomeric hexanes, the isomer which can give two monochlorinated compounds is [AIEEE 2005]
A)
n-hexane done
clear
B)
2, 3-dimethylbutane done
clear
C)
2, 2-dimethylbutane done
clear
D)
2-methylpentane done
clear
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question_answer 175)
The product obtained on reaction of \[{{C}_{2}}{{H}_{5}}Cl\] with hydrogen over palladium carbon is [AFMC 2005]
A)
\[{{C}_{3}}{{H}_{8}}\] done
clear
B)
\[{{C}_{4}}{{H}_{10}}\] done
clear
C)
\[{{C}_{2}}{{H}_{6}}\] done
clear
D)
\[{{C}_{2}}{{H}_{4}}\] done
clear
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