CBSE Questions for Class 11 Medical Chemistry Hydrocarbons Quiz 9 - MCQExams.com

1,2 di-bromo cyclohexane on dehydrohalogenation gives
  • None of these
Butane can be obtained by reacting 
  • 1,2-dibromopropane with zinc
  • ethyl bromide with sodium
  • ethyl bromide with zinc
  • n-butyl alcohol with alcoholic KOH
The product of $$B$$ is $$HC \equiv CH \xrightarrow[Cl-(CH_2)_8 - Cl]{KNH_2} A \xrightarrow[Pd - BuSO_4]{H_2} B$$
When acetylene is possed through dil, $$H_2SO_4$$ in the presence of $$HgSO_4$$, the compound formed is 
  • ether
  • ketone
  • acetic acid
  • acetaldehyde
The correct IUPAC name of the above compound is  : 
1372583_a84b3f775bf74aaa8c7bf8e0c17d70ed.PNG
  • 1- Ethylidene Cyclohex-2-ene
  • 3- Ethylidene Cyclohex-1-ene
  • 1- Cyclopropylenyl  Ethene
  • 2- Cyclopropylenyl  Ethene
In the above reaction 'X' is  $$C_2H_5 - C \equiv C - CH_3 \xrightarrow[(ii) \ Zn/H_2O]{(i) \ X} C_2 H_5 - \underset{O}{\underset{||}{C}} - \underset{O}{\underset{||}{C}} - CH_3$$
  • $$HNO_3$$
  • $$O_3$$
  • Hot $$KMnO_4$$ solution
  • $$O_2$$
Predict the product of the following reaction sequence ethyne +
Excess $$NaNH_{2}$$
Excess $$I-CH_{2}-(CH_{2})_{2}-CH_{3}\rightarrow$$
  • $$6-$$iodo-hyxene
  • $$1-$$hexyne
  • $$5-$$decyne
  • $$1-$$iodo$$-1-$$hexene
The hydrocarbon which can react with sodium in liquid ammonia is:
  • $$C{H_3}C{H_2}C{H_2}C \equiv CC{H_2}C{H_2}C{H_3}$$
  • $$C{H_3}C{H_2}C \equiv CH$$
  • $$C{H_3}C \equiv CC{H_3}$$
  • $$C{H_3}C{H_2}C \equiv CC{H_2}C{H_3}$$
Product $$A$$ is:
1373705_2d76637950b04a3f8b430bfd6cd20a39.png
  • $$Ph-CH={CH}_{2}$$
  • $$Ph-C\equiv CH$$
  • $$Ph-{CH}_{2}-{CH}_{3}$$
  • $$Ph-C\equiv C\circleddash Na\oplus $$
Which is the most likely site of protonation?
1392737_d83c0c6b1ce54ebe8b8e886966586291.png
  • a
  • b
  • c
  • d
The reagent needed to convert 2- butyne to trans-2- butene is :
  • $${ H }_{ 2 }/Pt$$
  • $$H_{ 2 }$$/ Lindlar's catalyst
  • $$Li/NH_{ 3 }$$
  • $$Na/NH_{ 3 }$$
IUPAC name of $$H-CO-CN $$ is _____________.
  • Cyano methanal
  • 2-Oxoethane nitrile
  • Cyano ethanal
  • Formonitrile
Which of the following will have least hindered rotation about carbon-carbon bond?
  • Ethane
  • Ethylene
  • Acetylene
  • Hexachloro ethane
When methyl bromide is heated with zn it gives
  • $${ CH }_{ 4 }$$
  • $${ C }_{ 2 }{ H }_{ 6 }$$
  • $${ C }_{ 2 }{ H }_{ 4 }$$
  • $${ CH }_{ 3 }OH$$
The correct IUPAC name of the compound with molecular formula, $$(CH_{3})_{3}C - CH_{3}$$ is
  • Pentane
  • 1, 1, 1-Trimethylethane
  • 2, 2-Dimethylpropane
  • Neopentane
Which of the following alkane has highest boiling point ?
  • n-Pentane
  • 2-Methyl pentane
  • Neopentane
  • Propane
Kolbe's electrolusis of sodium maleate at anode gives.
  • Only acetylene
  • $$
    \mathrm{CO}_{2}
    $$
  • acetylene $$
    +\mathrm{CO}_{2}
    $$
  • $$
    \mathrm{CO}_{2}+\mathrm{H}_{2}
    $$
Which of the following compound is heterocyclic aromatic compound?
IUPAC name of the following is:

1485850_293d48fe282b4635908188fb696dbefc.PNG
  • 3,4- dimethylpentane
  • 3- isopropylbutane
  • 2, 3 - dimethylpentane
  • 3 - methylhexane
The IUPAC name of the complex $$[Co(NH_{3})_{4} Cl_{2}]$$ Cl is ___________________.
  • Dichlorotetraamminecobalt (III) chloride
  • Tetraamminedichlorocobalt (III) chloride
  • Tetraamminedichlorocobalt (II) chloride
  • Tetraamminedichlorocobalt (IV) chloride
Which of the following statement is/are not correct?
  • Alkynes are more reactive than alkenes in both electrophilic and nucleophilic addition reactions.
  • Alkynes are more reactive than alkenes in electrophilic addition reactions but less reactive in nucleophilic addition reactions.
  • Alkynes are less reactive than alkenes in electrophilic addition reactions but more reactive in nucleophilic addition reactions.
  • Alkynes and alkenes both have low reactively in electrophilic addition reactions but both have high reactively in nucleophilic addition reactions.
The IUPAC name of $$CH_3 C\equiv CCH(CH_3)_2$$ is :

  • 4-methyl-2-pentyne
  • 4,4'-dimethy1-2-butyne
  • methyl isopropyl acetylene
  • 3-trimethyl-4-pentyne
$$CH_{3} - CH = CH - CH = N - CH_{3} \xrightarrow {LiAlH_{4}}$$ What is final product?
  • $$CH_{3} - CH_{2} - CH_{2} - CH_{2} - NH - CH_{3}$$
  • $$CH_{3} - CH = CH - CH_{2} - NH - CH_{3}$$
  • $$CH_{3} - CH_{2} - CH_{2} - CH - N - CH_{3}$$
  • $$CH_{3} - CH = CH - CH_{2} - OH$$
Which of the following is aromatic?
1581478_c7a24824477b41e2804dc445ec0920d9.png
  • i
  • ii
  • iii
  • iv

IUPAC name of given compound is:
1613010_af47383a98c84c17a91f69a4c88e0d26.png
  • 3, 4 - Dimethyl - 4 - propylhept - 1- en - 6 - yne
  • 3, 5 - Dimethyl - 4 - propylhept - 1- en - 6 - yne
  • 3, 4 - Dimethyl - 4 - propylhept - 6- en - 1 - yne
  • 4 - propyl - 3, 5 - dimethylhept - 6- en - 1 - yne
Which of the following will produce 4- methyl - 1- pentyne ? 
  • ethyne + 1) $$NaNH_{2}$$ 2) 1- iodobutane
  • propyne +1) $$NaNH_{2}$$ 2) 1- iodpropane
  • ethyne +1) $$NaNH_{2}$$ 2) 1- iodo -2 methylprpane
  • propyne +1) $$NaNH_{2}$$ 2) -iodoprepane
Which process is used to make an alkene from a long-chain alkane?
  • Combustion
  • Condensation
  • Cracking
  • Polymerisation
Major product of following reaction :
$$CH_3 \underset{CH_3}{\underset{|}{\overset{CH_3}{\overset{|}{C}}}} - \underset{Cl}{\underset{|}{CH}} - CH_3 \, \xrightarrow{C_2H_5O^-}$$
  • $$CH_3 - \overset{CH_3}{\overset{|}{\underset{CH_3}{\underset{|}{C}}}} - \underset{OC_2H_5}{\underset{|}{CH}} - CH_3$$
  • $$CH_3 - \underset{CH_3}{\underset{|}{\overset{CH_3}{\overset{|}{C}}}} - CH = CH_2$$
  • $$CH_3 - \overset{CH_3}{\overset{|}{C}} = \underset{CH_3}{\underset{|}{C}} - CH_3$$
  • $$CH_3 - \overset{CH_3}{\overset{|}{\underset{OC_2H_5}{\underset{|}{C}}}} - \overset{CH_3}{\overset{|}{CH}} - CH_3$$
Which of the following statement is/are not correct?
  • Alkynes are more reactive than alkenes in both electrophilic and nucleophilic addition reactions.
  • Alkynes are more reactive than alkenes in electrophilic addition reactions but less reactive in nucleophilic addition reactions.
  • Alkynes are less reactive than alkenes in electrophilic addition reactions but more reactive in nucleophilic addition reactions.
  • Alkynes and alkenes both have low reactivity in electrophilic addition reactions but both have high reactivity in nucleophilic addition reactions.
State whether the following statements are True or False:

Propyl bromide on reaction with $$alc. KOH$$ gives acetylene.
  • True
  • False
The IUPAC name of the given compound is
1717605_01c816bf90454b7f94b1bcf156d3da68.PNG
  • 3,3-dimethyl-1-hyclohexanedroxy cy
  • 1,1-dimethyl-3-hydroxy cyclohexane
  • 3,3-dimethyl-1-cyclohexanol
  • 1,1-dimethyl-3-cyclohexanol
The IUPAC name of 
1717623_c3550688da1a40b2973ec6ca398c827a.PNG
  • 4-bromo-3-chloro-1-cyclohexen-5-yne
  • 5-bromo-6-chloro-1-cyclohexen-3-yne
  • 6-bromo-5-chloro-3-cyclohexen-3-yne
  • 6-bromo-5-chloro-1-cyclohexen-3-yne
The compounds given below are:
1717380_127caadc02a14c6c800a068d8c928550.PNG
  • enantiomers
  • identical
  • regiomers
  • diastereomers
The IUPAC name of the given is
1717589_9413dbc651fa4207a03acf10516030c7.PNG
  • 3-methyl cyclohexene
  • 1-methyl cyclohex-2-ene
  • 6-methyl cyclohexene
  • 1-methyl cyclohex-5-ene
The IUPAC name of the given compound is
1717546_0c7562a63d1d4a3b82f675fbfc6272f7.PNG
  • 3-phenylbutane
  • 3-cyclohexybutane
  • 2-cyclohexylbutane
  • 2-ohenylbutane
The IUPAC name of the following compound is :
$${CH}_{3}-CH=CH-C\equiv CH$$
  • Pent-4-yn-2-ene
  • Pent-2-en-4-yne
  • Pent-3-en-1-yne
  • Pent-1-yn-3-ene

1717802_cafd98115fcf434ea8197db17e742b0e.PNG
  • Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
  • Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
  • Assertion is correct but Reason is incorrect
  • Assertion is incorrect but Reason is correct
The IUPAC name of the compound shown is:
1717635_6026f65043d14658934d5602e840ce5b.PNG
  • 2-bromo-6-chlorocyclohex-1-ene
  • 6-bromo-2-chlorocyclohexene
  • 3-bromo-1-chlorocyclohexene
  • 1-bromo-3-chlorocyclohexene
The IUPAC name of the given compound is
1717664_88792698ae044207b281a44f52b3d742.PNG
  • bicyclo [2.2.0] octane
  • bicyclo [0,2,2] hexane
  • bicyclo [2,1,1] hexane
  • bicyclo [2,2,0] hexane
The IUPAC name of the compound is:
1718068_87b65e35afb34c6e86cef5e17e43454b.PNG
  • 1-cyclopropyl-4-tert.butyl cyclohexane
  • 4-chloropropyl-1-tert. butyl cyclohexane
  • 1-cyclcopropyl hexyl-2,2-dimethylpropane
  • 1-dimethyl ethyl-4-cyclopropyl cyclohexane
The IUPAC name of the given compound will be:
1718066_fe30fb2cd3f44c3ca82c9ce501f3799c.PNG
  • 5-ethyl-1-methyl-2-propylcyclohexane
  • 1-ethyl-3-methyl-4-propylcyclohexane
  • 4-Ethyl-2-methyl-1-propylcyclohexane
  • 1-propyl-3-ethyl-2-methylcyclohexane
The IUPAC name of the given, is
1718033_d208ef9bc2ed41dcaf82f0372e3b290d.PNG
  • bicyclo [4.3.1] decane
  • bicyclo [3.2.0] nonane
  • bicyclo [2.2.2] decane
  • bicyclo [3.3.0] nonane
Select the correct IUPAC name of the following compound:
1718083_1be64c3341744afd84e3887740be7e48.PNG
  • 3-ethyl-1,5-dimethylcyclopentane
  • 1-ethyl-3,4-dimethylcyclopentane
  • 4-Ethyl-1,2-dimethylcyclopentane
  • 2-ethyl-4,5-dimethylcyclopentane
The decreasing order of boiling points amongst the isomeric pentanes is: 
$$\mathrm{neo-pentane>iso-pentane>n-pentane}$$.   
  • True
  • False
Which name is correct?
Select the correct IUPAC name of the given compound:
1718076_9307d9ada9af4eb4b43fab78ca2f8f75.PNG
  • 1,1-cyclobutyl heptane
  • Bicyclo [6.3.0] nonane
  • Spiro [3.6] decane
  • Spiro [6.3] decane
Which of the following is the correct IUPAC name of the given compound?
1718077_46adbae7e91f4729959ece40fe7b6084.PNG
  • 3-cyclobutyl-1-methylcyclohexane
  • 1-methyl-3-cyclobutylcyclohexane
  • 1-cyclobutyl-5-methylcyclohexane
  • 1-cyclobutyl-3-methylcyclohexane
The reactivity of hydrogen atoms attached to the carbon atom in an alkane has the order: 
  • tertiary $$>$$ primary $$>$$ secondary
  • secondary $$>$$ primary $$>$$ tertiary
  • tertiary $$>$$ secondary $$>$$ primary
  • primary $$>$$ secondary $$>$$ tertiary
Butane can be converted into 2-methylpropane, if heated with:
  • $$AlCl_{3}$$
  • $$Cr_{2}O_{3}$$
  • $$CrO_{2}Cl_{2}$$
  • Na/ether
Reaction of alkanes with halogen is explosive in case of:
  • $$Cl_{2}$$
  • $$F_{2}$$
  • $$Br_{2}$$
  • $$I_{2}$$
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