$$Ph-C\equiv C\circleddash Na\oplus $$

5-bromo-6-chloro-1-cyclohexen-3-yne

4-bromo-3-chloro-1-cyclohexen-5-yne

6-bromo-5-chloro-3-cyclohexen-3-yne

6-bromo-5-chloro-1-cyclohexen-3-yne

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

MCQ Questions for Class 11 Medical Chemistry Hydrocarbons Quiz 9

1,2 di-bromo cyclohexane on dehydrohalogenation gives

0%
0%
0%
0%
None of these

Butane can be obtained by reacting

0%
1,2-dibromopropane with zinc
0%
ethyl bromide with sodium
0%
ethyl bromide with zinc
0%
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

0%
ether
0%
ketone
0%
acetic acid
0%
acetaldehyde

The correct IUPAC name of the above compound is :

0%
1- Ethylidene Cyclohex-2-ene
0%
3- Ethylidene Cyclohex-1-ene
0%
1- Cyclopropylenyl Ethene
0%
2- Cyclopropylenyl Ethene

In the above reaction 'X' is

$C_2H_5 - C \equiv C - CH_3 \xrightarrow[(ii) \ Zn/H_2O]{(i) \ X} C_2 H_5 - \underset{O}{\underset{||}{C}} - \underset{O}{\underset{||}{C}} - CH_3$

0%
$HNO_3$
0%
$O_3$
0%
Hot $KMnO_4$ solution
0%
$O_2$

Predict the product of the following reaction sequence ethyne +
Excess

$NaNH_{2}$
Excess

$I-CH_{2}-(CH_{2})_{2}-CH_{3}\rightarrow$

0%
$6-$ iodo-hyxene
0%
$1-$ hexyne
0%
$5-$ decyne
0%
$1-$ iodo $-1-$ hexene

The hydrocarbon which can react with sodium in liquid ammonia is:

0%
$C{H_3}C{H_2}C{H_2}C \equiv CC{H_2}C{H_2}C{H_3}$
0%
$C{H_3}C{H_2}C \equiv CH$
0%
$C{H_3}C \equiv CC{H_3}$
0%
$C{H_3}C{H_2}C \equiv CC{H_2}C{H_3}$

Product

$A$ is:

0%
$Ph-CH={CH}_{2}$
0%
$Ph-C\equiv CH$
0%
$Ph-{CH}_{2}-{CH}_{3}$
0%
$Ph-C\equiv C\circleddash Na\oplus$

Which is the most likely site of protonation?

0%
a
0%
b
0%
c
0%
d

The reagent needed to convert 2- butyne to trans-2- butene is :

0%
${ H }_{ 2 }/Pt$
0%
$H_{ 2 }$ / Lindlar's catalyst
0%
$Li/NH_{ 3 }$
0%
$Na/NH_{ 3 }$

IUPAC name of

$H-CO-CN$ is _____________.

0%
Cyano methanal
0%
2-Oxoethane nitrile
0%
Cyano ethanal
0%
Formonitrile

Which of the following will have least hindered rotation about carbon-carbon bond?

0%
Ethane
0%
Ethylene
0%
Acetylene
0%
Hexachloro ethane

When methyl bromide is heated with zn it gives

0%
${ CH }_{ 4 }$
0%
${ C }_{ 2 }{ H }_{ 6 }$
0%
${ C }_{ 2 }{ H }_{ 4 }$
0%
${ CH }_{ 3 }OH$

Explanation

This is a Wurtz type reaction.after complete this reaction product is ethane

$C_2H_6$ is correct answer

The correct IUPAC name of the compound with molecular formula,

$(CH_{3})_{3}C - CH_{3}$ is

0%
Pentane
0%
1, 1, 1-Trimethylethane
0%
2, 2-Dimethylpropane
0%
Neopentane

Which of the following alkane has highest boiling point ?

0%
n-Pentane
0%
2-Methyl pentane
0%
Neopentane
0%
Propane

Kolbe's electrolusis of sodium maleate at anode gives.

0%
Only acetylene
0%
$\mathrm{CO}_{2}$
0%
$+\mathrm{CO}_{2}$
0%
$\mathrm{CO}_{2}+\mathrm{H}_{2}$

Which of the following compound is heterocyclic aromatic compound?

IUPAC name of the following is:

0%
3,4- dimethylpentane
0%
3- isopropylbutane
0%
2, 3 - dimethylpentane
0%
3 - methylhexane

Explanation

Step 1: Basic steps for IUPAC nomenclature -

Identify the functional group and substituents.
Find the longest chain.
Start doing numbering from that end from where substituent will get least numbering.

Step 2: Explanation of the nomenclature:

There are some rules based on which names are given to the organic compounds decided by IUPAC. In this system, the 'Prefix' of the IUPAC name indicates the no. of carbon atoms and the 'Suffix' of the IUPAC name indicates, the number of bonds between the carbon atoms.

(i) The carbon chain with all single bonds between carbon atoms, therefore it is an alkane and a suffix $' -ane'.$
(ii) The longest continuous chain is of $5$ carbon. therefore, the root name will be $' pent-'.$

(iii) There is a methyl group attached with the 2nd and 3rd carbon of the main chain so, it is named as $'2,3-dimethyl'$ .
One thing to remember is that if we number the compound from left to right then there will be methyl at $C-3$ and $C-4$ position respectively and as we have to select the end from where the least numbering of substituent possible that is why we choose to number from right to left

$'2,3-dimethylpentane'$ .

The IUPAC name of the complex

$[Co(NH_{3})_{4} Cl_{2}]$ Cl is ___________________.

0%
Dichlorotetraamminecobalt (III) chloride
0%
Tetraamminedichlorocobalt (III) chloride
0%
Tetraamminedichlorocobalt (II) chloride
0%
Tetraamminedichlorocobalt (IV) chloride

Which of the following statement is/are not correct?

0%
Alkynes are more reactive than alkenes in both electrophilic and nucleophilic addition reactions.
0%
Alkynes are more reactive than alkenes in electrophilic addition reactions but less reactive in nucleophilic addition reactions.
0%
Alkynes are less reactive than alkenes in electrophilic addition reactions but more reactive in nucleophilic addition reactions.
0%
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 :

0%
4-methyl-2-pentyne
0%
4,4'-dimethy1-2-butyne
0%
methyl isopropyl acetylene
0%
3-trimethyl-4-pentyne

$CH_{3} - CH = CH - CH = N - CH_{3} \xrightarrow {LiAlH_{4}}$ What is final product?

0%
$CH_{3} - CH_{2} - CH_{2} - CH_{2} - NH - CH_{3}$
0%
$CH_{3} - CH = CH - CH_{2} - NH - CH_{3}$
0%
$CH_{3} - CH_{2} - CH_{2} - CH - N - CH_{3}$
0%
$CH_{3} - CH = CH - CH_{2} - OH$

Which of the following is aromatic?

0%
i
0%
ii
0%
iii
0%
iv

IUPAC name of given compound is:

0%
3, 4 - Dimethyl - 4 - propylhept - 1- en - 6 - yne
0%
3, 5 - Dimethyl - 4 - propylhept - 1- en - 6 - yne
0%
3, 4 - Dimethyl - 4 - propylhept - 6- en - 1 - yne
0%
4 - propyl - 3, 5 - dimethylhept - 6- en - 1 - yne

Which of the following will produce 4- methyl - 1- pentyne ?

0%
ethyne + 1) $NaNH_{2}$ 2) 1- iodobutane
0%
propyne +1) $NaNH_{2}$ 2) 1- iodpropane
0%
ethyne +1) $NaNH_{2}$ 2) 1- iodo -2 methylprpane
0%
propyne +1) $NaNH_{2}$ 2) -iodoprepane

Which process is used to make an alkene from a long-chain alkane?

0%
Combustion
0%
Condensation
0%
Cracking
0%
Polymerisation

Explanation

Solution:- (C) Cracking

Cracking is the breakdown of a large alkane into smaller alkenes.

$CH_3-CH_2-CH_3\xrightarrow{Cracking} CH_2=CH_2+CH_4$

Major product of following reaction :

$CH_3 \underset{CH_3}{\underset{|}{\overset{CH_3}{\overset{|}{C}}}} - \underset{Cl}{\underset{|}{CH}} - CH_3 \, \xrightarrow{C_2H_5O^-}$

0%
$CH_3 - \overset{CH_3}{\overset{|}{\underset{CH_3}{\underset{|}{C}}}} - \underset{OC_2H_5}{\underset{|}{CH}} - CH_3$
0%
$CH_3 - \underset{CH_3}{\underset{|}{\overset{CH_3}{\overset{|}{C}}}} - CH = CH_2$
0%
$CH_3 - \overset{CH_3}{\overset{|}{C}} = \underset{CH_3}{\underset{|}{C}} - CH_3$
0%
$CH_3 - \overset{CH_3}{\overset{|}{\underset{OC_2H_5}{\underset{|}{C}}}} - \overset{CH_3}{\overset{|}{CH}} - CH_3$

Explanation

$CH_3 - \overset{CH_3}{\overset{|}{\underset{CH_3}{\underset{|}{C}}}} - \underset{OC_2H_5}{\underset{|}{CH}} - CH_3$

Which of the following statement is/are not correct?

0%
Alkynes are more reactive than alkenes in both electrophilic and nucleophilic addition reactions.
0%
Alkynes are more reactive than alkenes in electrophilic addition reactions but less reactive in nucleophilic addition reactions.
0%
Alkynes are less reactive than alkenes in electrophilic addition reactions but more reactive in nucleophilic addition reactions.
0%
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.

0%
True
0%
False

The IUPAC name of the given compound is

0%
3,3-dimethyl-1-hyclohexanedroxy cy
0%
1,1-dimethyl-3-hydroxy cyclohexane
0%
3,3-dimethyl-1-cyclohexanol
0%
1,1-dimethyl-3-cyclohexanol

The IUPAC name of

0%
4-bromo-3-chloro-1-cyclohexen-5-yne
0%
5-bromo-6-chloro-1-cyclohexen-3-yne
0%
6-bromo-5-chloro-3-cyclohexen-3-yne
0%
6-bromo-5-chloro-1-cyclohexen-3-yne

The compounds given below are:

0%
enantiomers
0%
identical
0%
regiomers
0%
diastereomers

The IUPAC name of the given is

0%
3-methyl cyclohexene
0%
1-methyl cyclohex-2-ene
0%
6-methyl cyclohexene
0%
1-methyl cyclohex-5-ene

The IUPAC name of the given compound is

0%
3-phenylbutane
0%
3-cyclohexybutane
0%
2-cyclohexylbutane
0%
2-ohenylbutane

The IUPAC name of the following compound is :

${CH}_{3}-CH=CH-C\equiv CH$

0%
Pent-4-yn-2-ene
0%
Pent-2-en-4-yne
0%
Pent-3-en-1-yne
0%
Pent-1-yn-3-ene

0%
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
0%
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
0%
Assertion is correct but Reason is incorrect
0%
Assertion is incorrect but Reason is correct

The IUPAC name of the compound shown is:

0%
2-bromo-6-chlorocyclohex-1-ene
0%
6-bromo-2-chlorocyclohexene
0%
3-bromo-1-chlorocyclohexene
0%
1-bromo-3-chlorocyclohexene

The IUPAC name of the given compound is

0%
bicyclo [2.2.0] octane
0%
bicyclo [0,2,2] hexane
0%
bicyclo [2,1,1] hexane
0%
bicyclo [2,2,0] hexane

The IUPAC name of the compound is:

0%
1-cyclopropyl-4-tert.butyl cyclohexane
0%
4-chloropropyl-1-tert. butyl cyclohexane
0%
1-cyclcopropyl hexyl-2,2-dimethylpropane
0%
1-dimethyl ethyl-4-cyclopropyl cyclohexane

The IUPAC name of the given compound will be:

0%
5-ethyl-1-methyl-2-propylcyclohexane
0%
1-ethyl-3-methyl-4-propylcyclohexane
0%
4-Ethyl-2-methyl-1-propylcyclohexane
0%
1-propyl-3-ethyl-2-methylcyclohexane

The IUPAC name of the given, is

0%
bicyclo [4.3.1] decane
0%
bicyclo [3.2.0] nonane
0%
bicyclo [2.2.2] decane
0%
bicyclo [3.3.0] nonane

Select the correct IUPAC name of the following compound:

0%
3-ethyl-1,5-dimethylcyclopentane
0%
1-ethyl-3,4-dimethylcyclopentane
0%
4-Ethyl-1,2-dimethylcyclopentane
0%
2-ethyl-4,5-dimethylcyclopentane

The decreasing order of boiling points amongst the isomeric pentanes is:

$\mathrm{neo-pentane>iso-pentane>n-pentane}$ .

0%
True
0%
False

Explanation

As the boiling point of an alkane depends on the surface area of a molecule, higher the surface is, higher the boiling point of alkane. The branched-chain isomer of an alkane has a lower surface area than that of its straight-chain isomer, so the branched-chain isomer of an alkane has a lower boiling point than its straight-chain isomer.

So, higher the branches, lower is the boiling point.

So, the order of boiling point of isomeric pentanes is

$\mathrm{n-pentane>iso-pentane>neo-pentane}$ .

Hence, the given statement is False.

Which name is correct?

Select the correct IUPAC name of the given compound:

0%
1,1-cyclobutyl heptane
0%
Bicyclo [6.3.0] nonane
0%
Spiro [3.6] decane
0%
Spiro [6.3] decane

Which of the following is the correct IUPAC name of the given compound?

0%
3-cyclobutyl-1-methylcyclohexane
0%
1-methyl-3-cyclobutylcyclohexane
0%
1-cyclobutyl-5-methylcyclohexane
0%
1-cyclobutyl-3-methylcyclohexane

The reactivity of hydrogen atoms attached to the carbon atom in an alkane has the order:

0%
tertiary $>$ primary $>$ secondary
0%
secondary $>$ primary $>$ tertiary
0%
tertiary $>$ secondary $>$ primary
0%
primary $>$ secondary $>$ tertiary

Butane can be converted into 2-methylpropane, if heated with:

0%
$AlCl_{3}$
0%
$Cr_{2}O_{3}$
0%
$CrO_{2}Cl_{2}$
0%
Na/ether

Explanation

Isomerisation of an alkane takes place when reacted with

$\mathrm{AlCl_3}$ .

So, for converting butane into 2-methylpropane, butane may be reacted with

$\mathrm{AlCl_3}$ .

Hence, Option "A" is the correct answer.

Reaction of alkanes with halogen is explosive in case of:

0%
$Cl_{2}$
0%
$F_{2}$
0%
$Br_{2}$
0%
$I_{2}$

Explanation

Reaction of alkanes with halogen is explosive in case of

$F_{2}$ .

Hence, Option "B" is the correct answer.

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

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Practice Class 11 Medical Chemistry Quiz Questions and Answers

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

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Practice Class 11 Medical Chemistry Quiz Questions and Answers

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