Chapter 9: Hydrocarbons MCQs | chemistry Class 11 CBSE

ByteNotes

Chapter 9: Hydrocarbons MCQs | chemistry Class 11 CBSE | ByteNotes.in

MCQ

Easy difficulty • Choose the correct option

Easy

Question 1

Objective

The general formula of alkanes is:

Choices

ByteNotes

MCQ

Easy difficulty • Choose the correct option

Easy

Question 2

Objective

Which of the following is the most stable conformation of ethane?

Choices

ByteNotes

MCQ

Medium difficulty • Choose the correct option

Medium

Question 3

Objective

The IUPAC name of the alkene CH2=C(CH3)-CH3 is:

Choices

ByteNotes

MCQ

Easy difficulty • Choose the correct option

Easy

Question 4

Objective

Which reagent is used to test for unsaturation and also decolourises on reaction with an alkene?

Choices

ByteNotes

MCQ

Easy difficulty • Choose the correct option

Easy

Question 5

Objective

In the addition of HBr to propene in the absence of peroxide, the major product is:

Choices

ByteNotes

MCQ

Medium difficulty • Choose the correct option

Medium

Question 6

Objective

The energy difference between the staggered and eclipsed conformations of ethane is approximately:

Choices

ByteNotes

MCQ

Medium difficulty • Choose the correct option

Medium

Question 7

Objective

Which of the following compounds does NOT show cis-trans (geometrical) isomerism?

Choices

ByteNotes

MCQ

Easy difficulty • Choose the correct option

Easy

Question 8

Objective

The bond length of C≡C in ethyne is:

Choices

ByteNotes

MCQ

Easy difficulty • Choose the correct option

Easy

Question 9

Objective

Benzene was isolated by:

Choices

ByteNotes

MCQ

Easy difficulty • Choose the correct option

Easy

Question 10

Objective

In the free radical chlorination of methane, the step in which Cl-Cl bond undergoes homolysis is called:

Choices

ByteNotes

MCQ

Medium difficulty • Choose the correct option

Medium

Question 11

Objective

Which of the following is NOT a condition required for aromaticity according to Hückel's rule?

Choices

ByteNotes

MCQ

Medium difficulty • Choose the correct option

Medium

Question 12

Objective

Addition of HBr to propene in the presence of benzoyl peroxide gives:

Choices

ByteNotes

MCQ

Medium difficulty • Choose the correct option

Medium

Question 13

Objective

The Wurtz reaction is used to prepare alkanes containing:

Choices

ByteNotes

MCQ

Medium difficulty • Choose the correct option

Medium

Question 14

Objective

All six C-C bond lengths in benzene are equal to:

Choices

ByteNotes

MCQ

Easy difficulty • Choose the correct option

Easy

Question 15

Objective

Which hybridisation is present on the carbon atoms of the C=C double bond in ethene?

Choices

ByteNotes

MCQ

Medium difficulty • Choose the correct option

Medium

Question 16

Objective

The product obtained when ethyne reacts with water in the presence of HgSO4 and dilute H2SO4 at 333 K is:

Choices

ByteNotes

MCQ

Medium difficulty • Choose the correct option

Medium

Question 17

Objective

The correct order of reactivity of halogens with alkanes is:

Choices

ByteNotes

MCQ

Medium difficulty • Choose the correct option

Medium

Question 18

Objective

Which of the following directing groups deactivates the benzene ring towards electrophilic substitution?

Choices

ByteNotes

MCQ

Medium difficulty • Choose the correct option

Medium

Question 19

Objective

In the Newman projection of the eclipsed conformation of ethane, the dihedral angle between C-H bonds on adjacent carbons is:

Choices

ByteNotes

MCQ

Medium difficulty • Choose the correct option

Medium

Question 20

Objective

Which of the following alkane preparation methods always yields an even-carbon alkane at the anode?

Choices

ByteNotes

Premium Access

Unlock all MCQs

You are viewing 20 free MCQs from this chapter. Upgrade to Premium to unlock the remaining 20 questions.

Upgrade to Premium20 questions locked

Chapter sections

Chapter 9: Hydrocarbons | MCQs

The general formula of alkanes is:

Which of the following is the most stable conformation of ethane?

The IUPAC name of the alkene CH2=C(CH3)-CH3 is:

Which reagent is used to test for unsaturation and also decolourises on reaction with an alkene?

In the addition of HBr to propene in the absence of peroxide, the major product is:

The energy difference between the staggered and eclipsed conformations of ethane is approximately:

Which of the following compounds does NOT show cis-trans (geometrical) isomerism?

The bond length of C≡C in ethyne is:

Benzene was isolated by:

In the free radical chlorination of methane, the step in which Cl-Cl bond undergoes homolysis is called:

Which of the following is NOT a condition required for aromaticity according to Hückel's rule?

Addition of HBr to propene in the presence of benzoyl peroxide gives:

The Wurtz reaction is used to prepare alkanes containing:

All six C-C bond lengths in benzene are equal to:

Which hybridisation is present on the carbon atoms of the C=C double bond in ethene?

The product obtained when ethyne reacts with water in the presence of HgSO4 and dilute H2SO4 at 333 K is:

The correct order of reactivity of halogens with alkanes is:

Which of the following directing groups deactivates the benzene ring towards electrophilic substitution?

In the Newman projection of the eclipsed conformation of ethane, the dihedral angle between C-H bonds on adjacent carbons is:

Which of the following alkane preparation methods always yields an even-carbon alkane at the anode?

Unlock all MCQs

Practice in Quiz Mode