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question_answer1) What are haloalkanes?
question_answer2) Which chlorine containing compound is used for treatment of typhoid fever?
question_answer3) Name the hormone, deficiency of which causes goitre.
question_answer4) In which disease chloroquine is used?
question_answer5) What is the use of halothane?
question_answer6) Which type of halo compounds are used as blood substitute in surgery?
question_answer7) 7. Name the hybridisation of carbon atom with which halogen atom is bonded in the following compounds. (i) Alkyl halide (ii) Allylic halide (in) Vinylic halide (iv) Aryl halide (v) Benzylic halides.
question_answer8) Arrange the following alkyl halides in the order of increasing dipole moment
question_answer9) Arrange the 1°, 2°, 3° alcohols in the order of reactivity towards given halo acids.
question_answer10) Arrange the haloacids in order of increasing reactivity towards a given alcohol.
question_answer11) What will be the order of boiling points of different alkyl halides containing same alkyl group?
question_answer12) What is the effect of branching on the boiling point of isomeric haloalkanes?
question_answer13) Which class of organic reactions are common for alkyl halides?
question_answer14) What is ambient nucleophile?
question_answer15) Which type of reaction is possible between and OH?
question_answer16) What is inversion of configuration?
question_answer17) What is the order of reactivity towards reaction of 1°, 2° and 3° alkyl halides?
question_answer18) Which type of reaction occurs between tertiary butyl alcohol and hydrogen iodide?
question_answer19) What is the order of reactivity of the different halides of same alkyl group towards substitution reaction?
question_answer20) What do you mean by chiral molecule?
question_answer21) What is chirality?
question_answer22) What is asymmetric carbon?
question_answer23) Give an example of asymmetric molecule.
question_answer24) Define the term racemisation.
question_answer25) What are enantiomers?
question_answer26) In which type of reaction optically active alkyl halides undergo racemisation?
question_answer27) In which type of reaction optically active alkyl halides undergo inversion?
question_answer28) What are organ metallic compounds?
question_answer29) What is Grignard's reagent?
question_answer30) What are freons?
question_answer31) Write the full form of D.D.T.
question_answer32) Name two haloalkanes responsible for depletion of ozone layer.
question_answer33) Name two haloalkanes used as refrigerants.
question_answer34) What is halo form?
question_answer35) Propan-2-ol is an achiral molecule. Why?
question_answer36) Identify the compound which will undergo reaction. (a) or (b) or
question_answer37) Arrange the following halides in order of increasing reactivity.
question_answer38) Under what condition 2-methyl propene can be converted into isobutyl bromide?
question_answer39) Arrange the following in order of increasing boiling point. (i) (ii) (iii)
question_answer40) Arrange the following in order of their increasing reactivity in nucleophilic substitution reaction.
question_answer41) Which is better nucleophile, a bromide ion or an iodide ion?
question_answer42) Name the alkyl halide which car. be used to prepare methane and ethane in single steps.
question_answer43) Identify the hydrocarbon which lives only one monochlorination product.
question_answer44) Which type of solvent favors reaction?
question_answer45) Which isomer of has lowest boiling point?
question_answer46) Identify chiral molecule. (b)
question_answer47) What are aryl halides?
question_answer48) What is the hybridisation of carbon of benzne bonded to halogen in aryl halide?
question_answer49) How are ortho and. para isomers of aryl halides separated ' from each other?
question_answer50) What is electrophilic substitution reaction?
question_answer51) Arrange the following in increasing order of reactivity towards sulphonation : benzene, toluene, chlorobenzene methoxy benzene.
question_answer52) What is Fittig reaction?
question_answer53) What is Wurtz-Fittig reaction?
question_answer54) Predict the product of the following reaction
question_answer55) How are haloalkanes classified on the basis of hybridization of carbon bonded to halogen?
question_answer56) What are 1°, 2° and 3° halides?
question_answer57) Alkyl halides are more reactive than alkanes towards nucleophilic substitution reaction. Why?
question_answer58) Why is (thionyl chloride) preferred for the preparation of alkyl chloride from alkyl alcohol?
question_answer59) What products are expected when alkanes are treated with chlorine or bromine in presence of sunlight or ultraviolet light?
question_answer60) Direct reaction of alkane with halogen is not a suitable method for the preparation of alkyl halides. Why?
question_answer61) Explain Markownikoffs rule with example.
question_answer62) What happens when an alkene is treated with in
question_answer63) How is double bond in a molecule detected?
question_answer64) Explain Finkelstein reaction. Give example.
question_answer65) What is Swarts reaction? Give example.
question_answer66) Alkyl bromides and iodides develop colour when expos, to light. Explain.
question_answer67) The boiling point of alkyl halides are higher than those, the hydrocarbons of comparable molecular mass. Explain.
question_answer68) Give reasons "for the same alkyl group the boiling points of alkyl halides decrease in the order .
question_answer69) Why the boiling points of isomeric halo alkanes decrease with increasing branching?
question_answer70) Haloalkanes are only slightly soluble in water. Why?
question_answer71) Haloalkanes are more soluble in organic solvents. Why ?
question_answer72) Haloalkanes undergo nucleophilic substitution reaction readily Why?
question_answer73) Cyanides and nitrites are known as ambient nucleophiks Explain.
question_answer74) Haloalkanes react with KCN to give alkyl cyanide while with AgCN form isocyanides as the chief product.
question_answer75) What are nucleophilic substitution reactions?
question_answer76) Allylic and benzylic halides show high reactivity towards the reaction. Give reasons.
question_answer77) Explain why 3° alkyl halides undergo reaction very fast?
question_answer78) What is elimination? Explain with example.
question_answer79) State with example Zaitsev (Saytzeff) rule.
question_answer80) What is Wurtz reaction?
question_answer81) What happens when Grignard reagents react with a source of proton?
question_answer82) The use of DDT is banned in some countries, why?
question_answer83) How are freons prepared?
question_answer84) What are the disadvantages of using freons?
question_answer85) What happens when chloroform is exposed to sunlight?
question_answer86) Why is iodoform antiseptic?
question_answer87) Name three halogen containing organic compounds used in medicine.
question_answer88) Haloalkanes act as an electrophilic centre. Explain.
question_answer89) Give reasons for the following : (i) Dipole moment of is higher than that of . (ii) The reactions of primary and secondary alcohols with HY require presence of as catalyst.
question_answer90) How are alkyl fluorides prepared?
question_answer91) What are the points of similarities between and reactions?
question_answer92) What are the points of differences between and reactions?
question_answer93) Tertiary halides are least reactive towards reactions. Explain.
question_answer94) What is Grignard's reagent? How is it prepared.
question_answer95) In the preparation of Grignard's reagent all the starting materials must be dry. Why?
question_answer96) Aryl halides cannot be prepared by the reaction of hydrogen halide on phenol. Why?
question_answer97) Why ortho andpara halo toluene can be separated easily?
question_answer98) Reactions of arene with iodine is carried out in the presence of an oxidising agent. Why?
question_answer99) What is Sandmeyer's reaction?
question_answer100) Para dihalobenzenes have higher melting points as compared to their ortho and meta isomers.
question_answer101) Explain why aryl halides are extremely less reactive towards nucleophilic substitution reactions?
question_answer102) How is chlorobenzene converted to phenol?
question_answer103) Halogen atoms are ring deactivating towards electrophilic substitution reaction. Why?
question_answer104) Halobenzene is o, p directing. Why?
question_answer105) reaction of optically active compounds undergo racemisation whereas reaction led to inversion. Explain.
question_answer106) What happens when (i)is passed through boiling toluene in presence of sunlight. (ii) Toluene reacts with in the presence of catalyst.
question_answer107) Explain why no effect on reactivity of haloarene is observed by the presence of electron withdrawing group at meta position?
question_answer108) Electrophilic substitution reactions in haloarenes occur slowly and require more drastic conditions.
question_answer109) Chlorine is electron withdrawing but ortho, para directing in electrophilic aromatic substitution reactions. Why?
question_answer110) Give one chemical test to distinguish between and.
question_answer111) Classify the following as alkyl, alkyl and vinyl halides (i) \[C{{H}_{2}}CH=CFC{{H}_{2}}C{{H}_{3}}\] (ii) \[{{(C{{H}_{3}})}_{2}}CClC{{H}_{3}}\] (iii) \[C{{H}_{2}}=CHC{{H}_{2}}I\] (iv)
question_answer112) What is the decreasing order of reactivity of the following in \[{{S}_{{{N}^{2}}}}\]reaction? 1-Bromo-2-methylbutane, 1-Bromo-2-2-dimethylpropane, 1-Bromopentane.
question_answer113) What happens when chlorine is passed through boiling toluene?
question_answer114) What is the difference between hexachlorobenzene and benzene hexachloride?
question_answer115) Out of \[B{{r}^{-}}\] and \[{{I}^{-}}\] ions which is a better nucleophile?
question_answer116) Arrange the following halides in order of increasing \[{{S}_{{{N}^{2}}}}\] reactivity: \[C{{H}_{3}}Cl,\,C{{H}_{3}}Br,\,C{{H}_{3}}C{{H}_{2}}C{{l}_{2}},\]\[{{(C{{H}_{3}})}_{2}}CHCl\].
question_answer117) The reaction of primary alkyl halide with nitrite salt produces both \[RN{{O}_{2}}\]and \[RONO\]. Account for this behaviour.
question_answer118) The hydrocarbon styrene \[({{C}_{6}}{{H}_{5}}CH=C{{H}_{2}})\] can be prepared by the dehydrohalogenation of either 1-bromo-2-phenylethane or 1-bromo-1-phenylethane using alcoholic KOH. Which alkyl halide will take part in the reaction?
question_answer119) Among the aromatic compounds with molecular formula \[{{C}_{7}}{{H}_{7}}Cl,\] how many isomers are possible? Which of these is maximum reactive in nature?
question_answer120) Why is halogen atom attached to benzene ring ortho and para directing but deactivating in nature?
question_answer121) A compound is formed by the substitution of two chlorine atoms by two hydrogen atoms in propane. What is the number of structural isomers possible?
question_answer122) Which compound in the following pairs would react faster in \[{{S}_{N}}2\] displacement reactions? 1-Bromopentane or 2-Bromopentane. 1-Bromo-2-methylbutane or 2-Bromo-2-methylbutane.
question_answer123) Arrange the compounds \[C{{H}_{3}}F,\,\,C{{H}_{3}}I,\,\,C{{H}_{3}}Br,\,C{{H}_{3}}Cl\] in order of increasing reactivity in bimolecular nucleophilic substitution \[({{S}_{N}}^{2})\] reactions.
question_answer124) Predict the product of the following reaction \[C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,H-I\,\xrightarrow{\text{Na/ether}}\]
question_answer125) What happens when benzal chloride is boiled with aqueous NaOH solution?
question_answer126) Alkyl chlorides can be prepared by refluxing alcohol with thionyl chloride in the presence of pyridine. Why is pyridine used?
question_answer127) Why is cyclopropyl chloride less reactive than cyclopentyl chloride towards \[{{S}_{{{N}^{1}}}}\]reaction?
question_answer128) When heated to 300°C, neopentyl chloride forms 2-chloro-2-methylbutane. Why?
question_answer129) Name the alkyl halide which can be used to prepare methane and ethane in single step.
question_answer130) What happens when benzene is reacted with chlorine in the presence of ultraviolet light?
question_answer131) Perfluorocarbons are remarkably stable; why?
question_answer132) Identify the compound in the following pair that reacts with sodium iodide in acetone at a faster rate towards \[{{S}_{{{N}^{2}}}}\] mechanism. 1-Chlorohexane or cyclohexyl chloride:
question_answer133) Give the major products when 2-Bromo 3-methylbutane is reacted with sodium ethoxide.
question_answer134) Three alkyl halides A, B and C with molecular formula \[{{C}_{7}}{{H}_{15}}Cl\] have different boiling points. These are optically active in nature. On reacting with Mg dissolved in ether and then with water, each compound gives 2, 4-dimethylpentane. Suggest structures for the three isomers.
question_answer135) Why does not ammonolysis of alkyl halides yield pure amines?
question_answer136) 2-Bromopentane is treated with alcoholic KOH solution. What is the major product formed in this reaction? What is the name of the reaction?
question_answer137) Explain why displacement of cyanide ion and amide ion is not observed in nucleophilic substitution reaction.
question_answer138) Why is chloroform not used as anaesthetic these days? What is the commonly used anaesthetic?
question_answer139) Which compound in the following pairs will react faster in \[{{S}_{{{N}^{2}}}}\] reaction? (a) \[C{{H}_{3}}Br\]or\[C{{H}_{3}}I\] (b) \[{{(C{{H}_{3}})}_{3}}Br\] or \[C{{H}_{3}}Br\] (c) \[C{{H}_{2}}=CHBr\]or \[C{{H}_{2}}=CH-C{{H}_{2}}Br\].
question_answer140) Explain the formation of the products in the following reaction. \[C{{H}_{3}}CH=CHC{{H}_{2}}Br+{{H}_{2}}O\xrightarrow{\,}\,C{{H}_{3}}CH\]\[=CHC{{H}_{2}}OH+C{{H}_{3}}CH(OH)CH=C{{H}_{2}}\]
question_answer141) Arrange the following compounds in increasing order of \[{{S}_{{{N}^{1}}}}\] reactivity. (a) \[\underset{\begin{smallmatrix} \\ (I) \end{smallmatrix}}{\mathop{ClC{{H}_{2}}CH=CHC{{H}_{2}}C{{H}_{3}},}}\,\] \[\underset{\begin{smallmatrix} \\ (II) \end{smallmatrix}}{\mathop{C{{H}_{3}}C(Cl)=CHC{{H}_{2}}C{{H}_{3}},}}\,\] \[\underset{\begin{smallmatrix} \\ (III) \end{smallmatrix}}{\mathop{C{{H}_{3}}CH=CHC{{H}_{2}}C{{H}_{2}}Cl}}\,\] (b) \[\underset{\begin{smallmatrix} \\ (I) \end{smallmatrix}}{\mathop{C{{H}_{3}}C{{H}_{2}}Br,}}\,\] \[\underset{\begin{smallmatrix} \\ (II) \end{smallmatrix}}{\mathop{C{{H}_{2}}=CHCH(Br)C{{H}_{3}},}}\,\] \[\underset{(III)}{\mathop{C{{H}_{2}}=CHBr,}}\,\] \[\underset{\begin{smallmatrix} \\ (IV) \end{smallmatrix}}{\mathop{C{{H}_{3}}CH(Br)C{{H}_{3}}}}\,\] (c) \[\underset{(I)}{\mathop{{{(C{{H}_{3}})}_{3}}CBr,}}\,\] \[\underset{\begin{smallmatrix} \\ (II) \end{smallmatrix}}{\mathop{{{(C{{H}_{3}})}_{2}}CHBr,}}\,\] \[\underset{\begin{smallmatrix} \\ (III) \end{smallmatrix}}{\mathop{C{{H}_{3}}\,C{{H}_{2}}C{{H}_{2}}Br}}\,\]
question_answer142) Explain why reaction of\[HCl\] with \[C{{F}_{2}}CH=C{{H}_{3}}\] proceeds according to Antimarkownikov's rule.
question_answer143) Predict the order of reactivity of following compounds in \[{{S}_{{{N}^{1}}}}\] reactions.
question_answer144) Out of \[C{{H}_{3}}\overset{\oplus }{\mathop{C}}\,HC{{H}_{3}}\] and \[C{{F}_{3}}\overset{\oplus }{\mathop{C}}\,HC{{H}_{3}}\] which is more reactive and why?
question_answer145) What will be the major organic product of the following reaction? \[{{C}_{6}}{{H}_{5}}{{C}_{2}}{{H}_{5}}\xrightarrow[(ii)\,NaCN]{(i)\,B{{r}_{2}},\,hv}\]
question_answer146) Write the major product of the following reactions : (a) \[C{{H}_{2}}=CHBr\,\xrightarrow[\text{alcohol}]{\text{AgCN}}\] (b)
question_answer147) Write down the structure of the product of the following reactions. (i) \[C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{C}}}\,-Br\,\xrightarrow[{{C}_{2}}{{H}_{5}}OH]{{{C}_{2}}{{H}_{5}}ONa}?\] (ii) 3-Methyl-1-butene \[\xrightarrow{HBr}\]?
question_answer148) An alkyl halide (A), on reaction with magnesium in dry ether followed by treatment with ethanol gave 2-methylbutane. Write all the possible structures of A.
question_answer149) Differentiate between chiral and achiral molecules.
question_answer150) Identify and indicate the presence of centre of chirality, if any, in the following molecules? How many stereo isomers are possible for each. (i) 2-Aminobutane (ii) 3-Bromopent-1-ene (iii) 1, 2-Dichloropropane. (iv) 3-Methyl-1-pentene
question_answer151) What are enantiomers? Draw the structures of the possible enantiomers of 3-methylpent-1-ene.
question_answer152) Differentiate between retention and inversion.
question_answer153) Arrange the following halides in order of increasing \[{{S}_{N}}2\] reactivity : \[C{{H}_{3}}Cl,\,C{{H}_{3}}Br,\,C{{H}_{3}}C{{H}_{2}}Cl,\]\[{{(C{{H}_{3}})}_{2}}CHCl\].
question_answer154) Predict the order of reactivity of the following compounds in \[{{S}_{N}}1\] reactions.
question_answer155) Arrange the following halides in the decreasing order of \[{{S}_{N}}1\] reactivity. \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}Cl\,(I),\,C{{H}_{2}}=CHCHClC{{H}_{3}}(II)\]\[and\,\,C{{H}_{3}}C{{H}_{2}}CHClC{{H}_{3}}(III)\]
question_answer156) Which one of the following pairs undergo \[{{S}_{N}}1\] substitution reaction faster and why? (i) or (ii) or
question_answer157) Which compound in the following couples, will react faster in \[{{S}_{N}}2\] displacement and why? (a) 1-Bromopentane or 2-bromopentane (b) 1-Bromo-2-methylbutane or 2-bromo-2-methylbutane.
question_answer158) The following reaction gives two products. \[{{C}_{6}}{{H}_{5}}\,C{{H}_{2}}CHCl{{C}_{6}}{{H}_{5}}\xrightarrow{\text{Alcoholic}\,\text{KOH,}\,\text{heat}}\]Write the structures of the products.
question_answer159) (i) (ii) Predict the product of the reaction.
question_answer160) Account for the following: (a) Chloromethane reacts with KCN to form ethanitrile as main product and with AgCN to form methyl isocyanide as chief product. (b) Use of DDT was banned in United States in 1973. (c) Benzylic halides show high reactivity towards \[{{S}_{N}}1\] reaction.
question_answer161) Propose a mechanism of the reaction taking place when (a) (-)-2-Bromooctane reacts with sodium hydroxide to form (+)-octan-2-ol (b) 2-Bromopentane is heated with (ale). KOH to form alkenes.
question_answer162) \[{{C}_{6}}{{H}_{5}}CHClC{{H}_{3}}\] is hydrolysed more easily with KOH than \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}Cl\] . Explain.
question_answer163) Arrange the following in the decreasing order of reactivity towards \[{{S}_{N}}2\] displacement reaction and give reasons in support of your answer. (a)\[{{C}_{2}}{{H}_{5}}Br,\,\,{{C}_{2}}{{H}_{5}}I,\,\,{{C}_{2}}{{H}_{5}}Cl\] (b) \[{{(C{{H}_{3}})}_{3}}CBr,\]\[C{{H}_{3}}C{{H}_{2}}CHBrC{{H}_{3}},\]\[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}Br\]
question_answer164) \[CH{{F}_{3}}\] is less acidic than \[CHC{{l}_{3}}\]. Explain.
question_answer165) Complete the following reaction. \[C{{H}_{3}}-CH=C{{H}_{2}}\xrightarrow[peroxide]{HBr}X\xrightarrow[Acetone]{NaI}Y\]
question_answer166) Arrange the following compounds in order of increasing boiling points. 1-Chlorobutane, isopropyl chloride, 1-Chlorobutane
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