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BITSAT SERIES
Chemistry

Hydrocarbons

20 previous year questions.

Volume: 20 Ques
Yield: Medium

High-Yield Trend

3
2026
1
2025
5
2020
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2018
1
2016
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2014
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2013
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2012
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2011
3
2010

Chapter Questions
20 MCQs

01
PYQ 2010
medium
chemistry ID: bitsat-2
The unsaturated hydrocarbon which on ozonolysis gives one mole each of formaldehyde, acetaldehyde and methyl glyoxal (CH₃COCHO) is
1
CH₃–CH=C(CH₃)–CH₃
2
CH₂=CH–CH₂–CH=CH₂
3
CH₂=CH–C(CH₃)=CH–CH₃
4
(CH₃)₂C=CH–CH₃
02
PYQ 2010
medium
chemistry ID: bitsat-2
According to IUPAC system, the correct name of the compound having the formula CH₃-C(CH₂)-CH₂-CH₃
1
2-ethyl-3-methylbut-1-ene
2
2-methylpent-3-ene
3
2-methylbut-1-ene
4
None of these
03
PYQ 2010
medium
chemistry ID: bitsat-2
Match List I (Reaction) with List II (Reagent) and select the correct answer. arrayl l List I & List II
I. Etard reaction & A. Alcoholic KOH
II. Hydroxylation & B. Anhydrous AlCl₃
III. Dehydrohalogenation & C. Chromyl chloride
IV. Friedel–Crafts reaction & D. Dilute alkaline KMnO₄ array
1
I-A, II-B, III-C, IV-D
2
I-D, II-C, III-A, IV-B
3
I-C, II-D, III-A, IV-B
4
I-B, II-A, III-D, IV-C
04
PYQ 2011
medium
chemistry ID: bitsat-2

What will be the product in the following reaction? 

1
A
2
B
3
C
4
D
05
PYQ 2012
medium
chemistry ID: bitsat-2

Identify ‘C’ in the following reaction: 

1
Benzamide
2
Benzoic acid
3
Chlorobenzene
4
Aniline
06
PYQ 2012
medium
chemistry ID: bitsat-2
Which alkene on ozonolysis gives and ?
1

2

3

4

07
PYQ 2013
medium
chemistry ID: bitsat-2

What will be the correct structural formula of the product for the following reaction? 

1
A
2
B
3
C
4
D
08
PYQ 2013
medium
chemistry ID: bitsat-2
Which one of the following reactions is expected to readily give a hydrocarbon product in good yields?
1

2

3

4

09
PYQ 2014
medium
chemistry ID: bitsat-2
The number of double bonds in gammaxene is:
1
0
2
1
3
2
4
3
10
PYQ 2016
medium
chemistry ID: bitsat-2
Which of the following compound has all the four types (1°, 2°, 3° and 4°) of carbon atoms?
1
2,3,4-Trimethylpentane
2
neo-Pentane
3
2,2,4-Trimethylpentane
4
None of the three
11
PYQ 2018
medium
chemistry ID: bitsat-2

In a set of reactions, ethylbenzene yielded a product D. The reaction sequence is:

Ethylbenzene → [KOH] → KMnO₄ → B → [Br₂/FeCl₃] → C → [C₂H₅OH, H⁺] → D

The correct structure of product D is: 



1
Benzyl bromide ethyl ester
2
Dibromobenzyl ethyl ester
3
Ethoxy benzoic acid
4
Ethyl m-bromobenzoate
12
PYQ 2020
easy
chemistry ID: bitsat-2

Give the possible structure of X in the following reaction: C₆H₆ + D₂SO₄ xrightarrowD₂O X 

13
PYQ 2020
medium
chemistry ID: bitsat-2

In the following reaction: Phenol + acetone xrightarrowH⁺ X The product [X] is: 





 

1
Option a
2
Option b
3
Option c
4
Option d
14
PYQ 2020
medium
chemistry ID: bitsat-2
An aromatic compound has molecular formula C₇H₇Br. Give the possible isomers and the appropriate method to distinguish them.
1
3 isomers; by heating with AgNO₃ solution
2
4 isomers; by treating with AgNO₃ solution
3
4 isomers; by oxidation
4
5 isomers; by oxidation
15
PYQ 2020
medium
chemistry ID: bitsat-2
Which of the following methods gives better yield of p-nitrophenol?
1
Phenol [20^∘C]dil. HNO₃ p-Nitrophenol
2
Phenol (i) NaNO₂ + H₂SO₄ (ii) HNO₃ p-Nitrophenol
3
Phenol (i) NaOH (ii) conc. HNO₃
4
None of the three
16
PYQ 2020
medium
chemistry ID: bitsat-2
Which of the following compounds has all the four types (1^∘, 2^∘, 3^∘ and 4^∘) of carbon atoms?
1
2,3,4-Trimethylpentane
2
neo-Pentane
3
2,2,4-Trimethylpentane
4
None of the three
17
PYQ 2025
easy
chemistry ID: bitsat-2
Which of the following is an alkene?
1
C H
2
C H
3
C H
4
C H
18
PYQ 2026
medium
chemistry ID: bitsat-2
Decreasing order of reactivity towards electrophilic substitution for the following compounds is:

1
C > B > A > D > E
2
E > D > A > B > C
3
A > D > E > B > C
4
D > A > E > C > B
19
PYQ 2026
medium
chemistry ID: bitsat-2
How many moles of oxygen are required to completely combust 1 mole of propane (C H )?
1
4 moles
2
5 moles
3
6 moles
4
3 moles
20
PYQ 2026
medium
chemistry ID: bitsat-2
The one giving maximum number of isomeric alkenes on dehydrohalogenation reaction is (excluding rearrangement):
1
1-Bromo-2-methylbutane
2
2-Bromopropane
3
2-Bromopentane
4
2-Bromo-3,3-dimethylpentane

About Hydrocarbons - BITSAT

Hydrocarbons is a vital chapter for BITSAT aspirants. Mastering the concepts covered in this chapter is essential for securing a top rank.

By rigorously practicing the previous year questions associated with this chapter, you can identify high-yield topics, understand the examiner's perspective, and boost your confidence during the actual exam.

Frequently Asked Questions

Why focus on Hydrocarbons PYQs?

Analyzing PYQs for this specific chapter reveals the most frequently tested concepts and the typical complexity of questions, allowing you to tailor your study plan efficiently.

How to best use this analysis?

Review the topic breakdown to see which sub-topics within Hydrocarbons carry the most weight. Then, tackle the questions iteratively to solidify your understanding.