Acids and Bases is an important topic in the Chemistry section in BITSAT exam. Practising this topic will increase your score overall and make your conceptual grip on BITSAT exam stronger.
This article gives you a full set of BITSAT PYQs for Acids and Bases with explanations for effective preparation. Practice of BITSAT Chemistry PYQs including Acids and Bases questions regularly will improve accuracy, speed, and confidence in the BITSAT 2026 exam.
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BITSAT PYQs for Acids and Bases with Solutions
1.
The $pH$ of a $0.01 \,M\, HCN$ solution for which $pK_a$ is $4$ is- 0.47
- 1.2
- 3
- 4
2.
The pH of a 0.01 M solution of a weak acid HA is 4. Calculate its dissociation constant (Ka).- $1.0 \times 10^{-6}$
- $1.0 \times 10^{-8}$
- $1.0 \times 10^{-4}$
- $1.0 \times 10^{-5}$
3.
What is the correct increasing order of Bronsted bases?- $ClO _{4}^{-}< ClO _{3}^{-}< ClO _{2}^{-}< ClO ^{-}$
- $ClO _{4}^{-}> ClO _{3}^{-}> ClO _{2}^{-}> ClO ^{-}$
- $ClO _{3}^{-}< ClO _{4}^{-}< ClO _{2}^{-}< ClO ^{-}$
- $ClO ^{-}> ClO _{3}^{-}> ClO _{2}^{-}> ClO _{4}^{-}$
4.
$50 \, mL $ of $H_2O$ is added to $50 \, mL$ of $1 \times 10^{-3}\, M$ barium hydroxide solution. What is the pH of the resulting solution?- 3
- 3.3
- 11
- 11.7
5.
Which of the following is a strong acid?- CH\(_3\)COOH
- HCl
- NH\(_4^+\)
- H\(_2\)CO\(_3\)
6.
The pOH value of a solution whose hydroxide ion concentration is $6.2 \times 10^{-9}$ mol/litre is- 8.21
- 6.21
- 7.75
- 7.21
7.
Given below are two statements ; one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A): The aqueous solution of \(CH_3COONa\) is alkaline in nature.
Reason (R): Acetate ion undergoes anionic hydrolysis
In the light of the above statements, choose the correct answer from the options given below
- both (A) and (R) are true and (R) is the correct explanation of (A).
- both (A) and (R) are true but (R) is not the correct explanation of (A).
- (A) is true but (R) is not true.
- (A) is not true but (R) is true.
8.
Which anion is the weakest base?- $C _{2} H _{5} O ^{-}$
- $NO _{3}^{-}$
- $F ^{-}$
- $CH _{3} COO ^{-}$
9.
A buffer solution is prepared by mixing 0.1 mol of acetic acid (\( \mathrm{p}K_a = 4.74 \)) and 0.2 mol of sodium acetate in 1 L solution. What is the pH of the buffer?- 4.44
- 5.04
- 4.74
- 5.74
10.
What is the pH of a 0.01 M solution of HCl?- 1
- 2
- 3
- 4
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