JEE Main & Advanced Chemistry Hydrocarbons / हाइड्रोकार्बन Question Bank

done Critical Thinking Total Questions - 40

• question_answer1)
  In the case homologous series of alkanes, which one of the following statements is incorrect?    [JIPMER 2000]
  A)
  The members of the series are isomers of each other done clear
  B)
  The members of the series have similar chemical properties done clear
  C)
  The members of the series have the general formula\[{{C}_{n}}{{H}_{2n+2}}\], where n is an integer done clear
  D)
  The difference between any two successive members of the series corresponds to 14 unit of relative atomic mass done clear
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• question_answer2)
  How many primary, secondary, tertiary and quaternary carbons are present in the following hydrocarbon \[C{{H}_{3}}-CH(C{{H}_{3}})-C{{(C{{H}_{3}})}_{2}}-C{{H}_{2}}-CH(C{{H}_{3}})-C{{H}_{2}}-C{{H}_{3}}\]
  A)
  Primary-6 Secondary-2 Tertiary-2 Quaternary-1 done clear
  B)
  Primary-2 Secondary-6 Tertiary-3 Quaternary-0 done clear
  C)
  Primary-2 Secondary-4 Tertiary-3 Quaternary-2 done clear
  D)
  Primary-2 Secondary-2 Tertiary-4 Quaternary-3 done clear
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• question_answer3)
  The octane number of a sample of petrol is 40. It means that its knocking property is equal to the mixture of [MP PMT 2003]
  A)
  40% n-heptane + 60% iso-octane done clear
  B)
  40% petrol + 60% iso-octane done clear
  C)
  60% n-heptane + 40% iso-octane done clear
  D)
  60% petrol + 40% iso-octane done clear
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• question_answer4)
  Formation of 2-butene as major product by dehydration of 2-butanol is according to [MP PMT 1995]
  A)
  Markownikoff rule done clear
  B)
  Saytzeff rule done clear
  C)
  Peroxide effect done clear
  D)
  Anti-Markownikoff rule done clear
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• question_answer5)
  \[C{{H}_{3}}C\equiv CC{{H}_{3}}\underset{(ii){{H}_{2}}O/Zn}{\mathop{\xrightarrow{(i)\text{ }X}}}\,\underset{\,O\,\,\,\,\,\,O\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,|}{\mathop{C{{H}_{3}}-C-C-C{{H}_{3}}}}\,}}\,\] X in the above reaction is [CPMT 1985; MP PET 1997; Roorkee Qualifying 1998; DPMT 2001]
  A)
  \[HN{{O}_{3}}\] done clear
  B)
  \[{{O}_{2}}\] done clear
  C)
  \[{{O}_{3}}\] done clear
  D)
  \[KMn{{O}_{4}}\] done clear
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• question_answer6)
  Which of the following is Friedel-Craft?s reaction [MP PET 1994]
  A)
  \[{{C}_{6}}{{H}_{6}}+FeC{{l}_{3}}+C{{l}_{2}}\to {{C}_{6}}{{H}_{5}}Cl\] done clear
  B)
  \[{{C}_{6}}{{H}_{5}}CHO+C{{H}_{3}}CHO+KOH\to {{C}_{6}}{{H}_{5}}CH=CH-CHO\] done clear
  C)
  \[{{C}_{6}}{{H}_{6}}+C{{H}_{3}}COCl+AlC{{l}_{3}}\to \overset{\,\,\,O}{\mathop{\overset{\,\,\,\,||}{\mathop{{{C}_{6}}{{H}_{5}}-C-C{{H}_{3}}}}\,}}\,\] done clear
  D)
  \[{{C}_{6}}{{H}_{5}}OH+CHC{{l}_{3}}+KOH\xrightarrow{{}}\text{Salicylaldehyde}\] done clear
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• question_answer7)
  Condition for maximum yield of \[{{C}_{2}}{{H}_{5}}Cl\] is   [IIT-JEE 1986]
  A)
  \[{{C}_{2}}{{H}_{6}}\] (excess) \[+C{{l}_{2}}\xrightarrow{UV\text{ Light}}\] done clear
  B)
  \[{{C}_{2}}{{H}_{6}}\] + \[C{{l}_{2}}\underset{\text{ Room}\,\text{temp}\text{.}}{\mathop{\xrightarrow{\text{Dark}}}}\,\] done clear
  C)
  \[{{C}_{2}}{{H}_{6}}+C{{l}_{2}}\text{ (excess) }\xrightarrow{UV\text{ Light}}\] done clear
  D)
  \[{{C}_{2}}{{H}_{6}}+C{{l}_{2}}\xrightarrow{UV\text{ Light}}\] done clear
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• question_answer8)
  When ethyl alcohol is heated with red phosphorus and HI, then which of the following is formed [Kurukshetra CEE 1998]
  A)
  \[{{C}_{2}}{{H}_{6}}\] done clear
  B)
  \[C{{H}_{4}}\] done clear
  C)
  \[{{C}_{3}}{{H}_{8}}\] done clear
  D)
  \[{{C}_{2}}{{H}_{4}}\] done clear
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• question_answer9)
  In the Fischer-Tropsch synthesis of petrol..... and ..... are used as the raw materials [KCET 1998]
  A)
  \[{{H}_{2}};CO\] done clear
  B)
  \[C{{H}_{4}};{{H}_{2}}\] done clear
  C)
  \[C{{H}_{4}};C{{H}_{3}}OH\] done clear
  D)
  \[C{{H}_{3}}OH;CO\] done clear
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• question_answer10)
  Which one of the following reactions is most suitable for the preparation of n-propyl benzene [MP PET/PMT 1998]
  A)
  Friedel-Craft's reaction done clear
  B)
  Wurtz reaction done clear
  C)
  Wurtz-Fittig reaction done clear
  D)
  Grignard reaction done clear
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• question_answer11)
  Propane cannot be prepared from which reaction [DCE 2003]
  A)
  \[C{{H}_{3}}-CH=C{{H}_{2}}\underset{O{{H}^{-}}}{\mathop{\xrightarrow{{{B}_{2}}{{H}_{6}}}}}\,\] done clear
  B)
  \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}I\underset{P}{\mathop{\xrightarrow{HI}}}\,\] done clear
  C)
  \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}Cl\xrightarrow{Na}\] done clear
  D)
  None of these done clear
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• question_answer12)
  The reaction \[C{{H}_{3}}CH=C{{H}_{2}}\underset{{{H}^{^{+}}}}{\mathop{\xrightarrow{(CO+{{H}_{2}})}}}\,C{{H}_{3}}-\underset{COOH\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{CH-C{{H}_{3}}}}\,\,\,\,\,\,}}\,\,\,\] is known as [MP PMT 2002]
  A)
  Wurtz reaction done clear
  B)
  Koch reaction done clear
  C)
  Clemmensen reduction done clear
  D)
  Kolbe?s reaction done clear
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• question_answer13)
  The compound \[C{{H}_{3}}-\overset{C{{H}_{3}}}{\mathop{\overset{\,\,|\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C\,\,=\,\,}}\,}}\,CH-C{{H}_{3}}\] on reaction with \[NaI{{O}_{4}}\]in the presence of \[KMn{{O}_{4}}\]gives [CBSE PMT 2003]
  A)
  \[C{{H}_{3}}CHO+C{{O}_{2}}\] done clear
  B)
  \[C{{H}_{3}}COC{{H}_{3}}\] done clear
  C)
  \[C{{H}_{3}}COC{{H}_{3}}+C{{H}_{3}}COOH\] done clear
  D)
  \[C{{H}_{3}}COC{{H}_{3}}+C{{H}_{3}}CHO\] done clear
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• question_answer14)
  In the reaction : \[HC\equiv CH+2AgN{{O}_{3}}\xrightarrow{N{{H}_{4}}OH}X+2N{{H}_{4}}N{{O}_{3}}+2{{H}_{2}}O\] ?X? is
  A)
  \[A{{g}_{2}}C\] done clear
  B)
  \[A{{g}_{2}}{{C}_{2}}\] done clear
  C)
  \[AgC\] done clear
  D)
  \[AgOH\] done clear
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• question_answer15)
  Naphthalene is a/an [AFMC 2004]
  A)
  Ionic solid done clear
  B)
  Covalent solid done clear
  C)
  Metallic solid done clear
  D)
  Molecular solid done clear
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• question_answer16)
  Which of the following is not aromatic [Pb. CET 2000]
  A)
  Benzene done clear
  B)
  Naphthalene done clear
  C)
  Pyridine done clear
  D)
  1,3,5 heptatriene done clear
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• question_answer17)
  Acetylene reacts with \[HCN\] in the presence of \[Ba{{(CN)}_{2}}\]to yield [UP SEAT 2004]
  A)
  1, 1-dicyanoethane done clear
  B)
  1, 2-dicyanoethane done clear
  C)
  Vinyl cyanide done clear
  D)
  None of these done clear
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• question_answer18)
  Write the products of the addition reaction \[\,\,\,\,\,C=C\,\,\,\,\,+XY\to \]   [Kerala (Med.) 2002]
  A)
  \[\,\,\,\,\,\underset{X}{\mathop{>\underset{|}{\mathop{C}}\,}}\,-\underset{\,Y\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,}{\mathop{C}}\,<}}\,\] done clear
  B)
  \[X-\underset{|}{\mathop{C}}\,=\underset{|}{\mathop{C}}\,-Y\] done clear
  C)
  \[\underset{|}{\overset{|}{\mathop{C}}}\,=\underset{Y}{\mathop{\underset{|}{\mathop{C}}\,}}\,-\] done clear
  D)
  \[X-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-X\] done clear
  E)
  \[\underset{|}{\overset{\overset{X}{\mathop{|}}\,}{\mathop{C}}}\,=\underset{\underset{Y}{\mathop{|}}\,}{\overset{|}{\mathop{C}}}\,\] done clear
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• question_answer19)
  Formation of polyethylene from calcium carbide takes place as follows \[Ca{{C}_{2}}+2{{H}_{2}}O\to Ca{{(OH)}_{2}}+{{C}_{2}}{{H}_{2}}\] \[{{C}_{2}}{{H}_{2}}+{{H}_{2}}\to {{C}_{2}}{{H}_{4}}\] \[n({{C}_{2}}{{H}_{4}})\to {{(-C{{H}_{2}}-C{{H}_{2}}-)}_{n}}\] The amount of polyethylene obtained from 64.1 kg \[Ca{{C}_{2}}\] is [AIIMS 1997]
  A)
  7 kg done clear
  B)
  14 kg done clear
  C)
  21 kg done clear
  D)
  28 kg done clear
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• question_answer20)
  Nitrobenzene can be prepared from benzene by using a mixture of conc. \[HN{{O}_{3}}\] and conc. \[{{H}_{2}}S{{O}_{4}}.\] In the nitrating mixture, \[HN{{O}_{3}}\] acts as a [IIT-JEE 1997]
  A)
  Base done clear
  B)
  Acid done clear
  C)
  Reducing agent done clear
  D)
  Catalyst done clear
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• question_answer21)
  A group which deactivates the benzene ring towards electrophilic substitution but which directs the incoming group principally to the o- and p-positions is [Pb. PMT 1998]
  A)
  \[-N{{H}_{2}}\] done clear
  B)
  \[-Cl\] done clear
  C)
  \[-N{{O}_{2}}\] done clear
  D)
  \[-{{C}_{2}}{{H}_{5}}\] done clear
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• question_answer22)
  Which order is correct for the decreasing reactivity to ring monobromination of the following compounds \[\begin{align}   & {{C}_{6}}{{H}_{5}}C{{H}_{3}}, \\  & \,\,\,\,\,\,\,\,\,\,\text{I} \\ \end{align}\] \[\begin{align}   & {{C}_{6}}{{H}_{5}}COOH, \\  & \,\,\,\,\,\,\,\,\,\,\,\,\,\text{II} \\ \end{align}\] \[\begin{align}   & {{C}_{6}}{{H}_{6}} \\  & \,\,\,\,\text{III} \\ \end{align}\] \[\begin{align}   & {{C}_{6}}{{H}_{5}}N{{O}_{2}} \\  & \,\,\,\,\,\,\,\,\,\,\text{IV} \\ \end{align}\]
  A)
  \[I>II>III>IV\] done clear
  B)
  \[I>III>II>I\] done clear
  C)
  \[II>III>IV>I\] done clear
  D)
  \[III>I>II>IV\] done clear
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• question_answer23)
  Benzene is obtained by [DPMT 2002]
  A)
  Substitution of three acetylene molecules done clear
  B)
  Addition of three \[{{C}_{2}}{{H}_{2}}\]molecules done clear
  C)
  Polymerisation of three \[{{C}_{2}}{{H}_{2}}\] molecules done clear
  D)
  Condensation of three \[{{C}_{2}}{{H}_{2}}\]molecules done clear
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• question_answer24)
  Toluene can be oxidised to benzoic acid by [AIIMS 1999]
  A)
  \[KMN{{O}_{4}}\] done clear
  B)
  \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] done clear
  C)
  \[{{H}_{2}}S{{O}_{4}}\] done clear
  D)
  Both A and B done clear
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• question_answer25)
  \[Ca{{C}_{2}}+{{H}_{2}}O\to A\xrightarrow{{{H}_{2}}S{{O}_{4}}/HgS{{O}_{4}}}B\]. Identify A and B in the given reaction [CPMT 2000; BVP 2004]
  A)
  \[{{C}_{2}}{{H}_{2}}\]and \[C{{H}_{3}}CHO\] done clear
  B)
  \[C{{H}_{4}}\]and \[HCOOH\] done clear
  C)
  \[{{C}_{2}}{{H}_{4}}\]and\[C{{H}_{3}}COOH\] done clear
  D)
  \[{{C}_{2}}{{H}_{2}}\]and \[C{{H}_{3}}COOH\] done clear
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• question_answer26)
  The compound X on reaction with \[HgS{{O}_{4}}+{{H}_{2}}S{{O}_{4}}\] gives Y which on oxidation gives acetic acid. X is [MP PMT 1999]
  A)
  \[{{C}_{2}}{{H}_{2}}\] done clear
  B)
  \[{{C}_{2}}{{H}_{4}}\] done clear
  C)
  \[{{C}_{3}}{{H}_{4}}\] done clear
  D)
  \[{{C}_{4}}{{H}_{6}}\] done clear
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• question_answer27)
  What is formed when calcium carbide react with heavy water [CPMT 1999]
  A)
  \[{{C}_{2}}{{D}_{2}}\] done clear
  B)
  \[Ca{{D}_{2}}\] done clear
  C)
  \[Ca{{D}_{2}}O\] done clear
  D)
  \[C{{D}_{2}}\] done clear
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• question_answer28)
  The addition of HBr is easiest with \[\] [MP PMT 2000]
  A)
  \[ClC{{H}_{2}}=CHCl\] done clear
  B)
  \[ClCH=CHCl\] done clear
  C)
  \[C{{H}_{3}}-CH=C{{H}_{2}}\] done clear
  D)
  \[{{(C{{H}_{3}})}_{2}}C=C{{H}_{2}}\] done clear
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• question_answer29)
  Identify the species X in the reaction : \[\text{Propene }+O\text{ (conc}\text{. acidic }KMn{{O}_{4}})\to X+\text{Formic acid}\]
  A)
  Acetone done clear
  B)
  Acetaldehyde done clear
  C)
  Isopropanol done clear
  D)
  Acetic acid done clear
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• question_answer30)
  In benzene 1, 3 position is called
  A)
  Meta done clear
  B)
  Para done clear
  C)
  Ortho done clear
  D)
  Odd position done clear
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• question_answer31)
  Which of the following is formed as a result of biological oxidation of benzene in the body of the dog [Manipal MEE 1995]
  A)
  Acrylic acid done clear
  B)
  Cinnamic acid done clear
  C)
  Maleic acid done clear
  D)
  Gluconic acid done clear
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• question_answer32)
  When acetylene is reacted with HBr, we get [CPMT 1979; JIPMER 2002]
  A)
  Methyl bromide done clear
  B)
  Ethyl bromide done clear
  C)
  Ethylene bromide done clear
  D)
  Ethylidene bromide done clear
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• question_answer33)
  The only o, p-directing group which is deactivating in nature is
  A)
  \[-N{{H}_{2}}\] done clear
  B)
  \[-OH\] done clear
  C)
  \[-X\] (Halogens) done clear
  D)
  \[-R\] (Alkyl groups) done clear
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• question_answer34)
  Which kind of isomerism will butene-2 show
  A)
  Geometrical done clear
  B)
  Optical done clear
  C)
  Position done clear
  D)
  None of these done clear
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• question_answer35)
  In presence of light toluene on reaction with chlorine gives [RPET 1999]
  A)
  Benzoyl chloride done clear
  B)
  Ortho chlorotoluene done clear
  C)
  Para chloro toluene done clear
  D)
  Benzyl chloride done clear
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• question_answer36)
  If ethylene, carbon monoxide and water is heated at high temperature, which of the following is formed [AIIMS 2000]
  A)
  \[{{C}_{4}}{{H}_{8}}{{O}_{2}}\] done clear
  B)
  \[{{C}_{2}}{{H}_{5}}COOH\] done clear
  C)
  \[C{{H}_{3}}COOH\] done clear
  D)
  \[C{{H}_{2}}=CH-COOH\] done clear
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• question_answer37)
  Compound \[{{C}_{6}}{{H}_{12}}\] is an [AMU 1983]
  A)
  Aliphatic saturated compound done clear
  B)
  Alicyclic compound done clear
  C)
  Aromatic compound done clear
  D)
  Heterocyclic compound done clear
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• question_answer38)
  Identify Z in the following series \[C{{H}_{2}}=C{{H}_{2}}\xrightarrow{HBr}X\xrightarrow{\text{Hydrolysis}}Y\underset{{{I}_{2}}\text{ excess}}{\mathop{\xrightarrow{N{{a}_{2}}C{{O}_{3}}}}}\,Z\] [AIIMS 1983; RPMT 1999]
  A)
  \[{{C}_{2}}{{H}_{5}}I\] done clear
  B)
  \[{{C}_{2}}{{H}_{5}}OH\] done clear
  C)
  \[CH{{I}_{3}}\] done clear
  D)
  \[C{{H}_{3}}CHO\] done clear
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• question_answer39)
  n-pentane and iso pentane can be distinguished by [BVP 2004]
  A)
  \[B{{r}_{2}}\] done clear
  B)
  \[{{O}_{3}}\] done clear
  C)
  conc. \[{{H}_{2}}S{{O}_{4}}\] done clear
  D)
  \[KMn{{O}_{4}}\] done clear
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• question_answer40)
  \[CH\equiv CH+HBr\to X,\] product X is [Pb. CET 2003]
  A)
  Ethylene bromide done clear
  B)
  Vinyl bromide done clear
  C)
  Bromo ethane done clear
  D)
  Ethyledine bromide done clear
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