Acid, Bases and Salt Class 10 Science MCQs

Here are some multiple-choice questions (MCQs) for CBSE Chapter 2  Class 10 Science Acid, Bases, and Salt. These MCQs are designed to help students become familiar with the question types and their difficulty levels according to the updated CBSE Syllabus. With the recent changes in the exam pattern, MCQs have become an important part of the Class 10 Science Board exam. To assist students in understanding these question types, we have compiled MCQs specifically for Chapter 2 to make fundamentals strong. Additionally, answers to these MCQs are also available for students to reference. These MCQs are available in PDF format for download, enabling students to access them at any time during their studies. Students can also use the CBSE Class 10 Sample Papers books for more practice.

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Important – CBSE Class 10 Science MCQ

CBSE Class 10 Chapter 2 Acids Bases and Salt MCQs

Q.1. Many salts absorb water from atmosphere. This property is called
(a) crystallisation (b) hydration
(c) deliquescence (d) efflorescence

Answer

(c)

Q.2. An aqueous solution of sodium acetate will turn
(a) methyl orange yellow
(b) red litmus blue
(c) phenolphthalein solution pink
(d) all of these.

Answer

(d)

 

Q.3. On diluting solution of pH of 4, its pH will
(a) remain same
(b) increase
(c) decrease
(d) undergo a chemical change.

Answer

(b) 

pH of the solution increases since the concentration of H+ decreases on dilution

 

Also Check – CBSE Sample Papers Class 10 for 2024 Board Exams

Q.4. Which of the following will change pH paper bluish violet?
(a) Dil. HCl
(b) Dil. CH3COOH
(c) Dil. Ca(OH)2
(d) Tomato juice

Answer

(c)

pH paper becomes violet because Ca(OH)2 is basic in nature

 

Q.5. An aqueous solution of the salt is acidic. Which of the following acids and bases react to give this salt?
(a) Strong acid and strong base
(b) Strong acid and weak base
(c) Weak acid and strong base
(d) Weak acid and weak base

Answer

(b)

 

Q.6. Which of the following compounds is neutral to litmus?
(a) NaNO₃ (b) CuSO₄.5H₂O
(c) NaHCO₃ (d) Ca(OH)₂

Answer

(a)

NaNO₃ is a salt of strong acid and strong base. NaOH + HNO₃ → NaNO₃ + H₂O

 

Q.7. 

(a) NaHCO₃, NaOCl₂ (b) NH₄Cl, Na₂CO₃
(c) Na₂CO₃, NH₄Cl (d) Na₂CO₃, NaHCO₃

Answer

(b)

 

Q.8. The pH of 0.05 M Ba(OH)2 solution is
(a) 12 (b) 13
(c) 1 (d) 10

Answer

(b)

 

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Q.9. pH of different solutions are given in the table below:

Solution	pH
P	2.2–2.4
Q	13.8–14.0
R	6.5–7.5
S	8.0–9.0

Arrange these solutions in the increasing order of OH– ion concentration.
(a) S < R < Q < P (b) P < R < S < Q
(c) R < S < Q < P (d) Q < S < R < P

(a) Lead sulphide (b) Hydrogen peroxide
(c) Lead sulphate (d) Water

Answer

(b)

 

Q.10. Which of the following is treated with chlorine to obtain bleaching powder ?
(a) CaSO₄ (b) Ca(OH)₂
(c) Mg(OH)₂ (d) KOH

Answer

(b)

CBSE Class 10 Science Acids, Bases and Salts MCQs – PDF Download

Answers

Summary for NCERT class 10 science chapter 2 – “Acids, Bases and Salts”

• Acid-base indicators are dyes or mixtures of dyes which are used to indicate the presence of acids and bases.
• Acidic nature of a substance is due to the formation of H+ (aq) ions in solution. Formation of OH– (aq) ions in solution is responsible for the basic nature of a substance.
• When an acid reacts with a metal, hydrogen gas is evolved and a corresponding salt is formed.
• When a base reacts with a metal, along with the evolution of hydrogen gas a salt is formed which has a negative ion composed of the metal and oxygen.
• When an acid reacts with a metal carbonate or metal hydrogencarbonate, it gives the corresponding salt, carbon dioxide gas and water.
• Acidic and basic solutions in water conduct electricity because they produce hydrogen and hydroxide ions respectively.
• The strength of an acid or an alkali can be tested by using a scale called the pH scale (0-14) which gives the measure of hydrogen ion concentration in a solution.
• A neutral solution has a pH of exactly 7, while an acidic solution has a pH less than 7 and a basic solution a pH more than 7.
• Living beings carry out their metabolic activities within an optimal pH range.
• Mixing concentrated acids or bases with water is a highly exothermic process.
• Acids and bases neutralise each other to form corresponding salts and water.
• Water of crystallisation is the fixed number of water molecules present in one formula unit of a salt.
• Salts have various uses in everyday life and in industries.

Best Reference Books for Class 10 Science

• NCERT Textbook + Exemplar Problems-Solutions
• Foundation Course Physics, Chemistry and Biology
• NCERT at your Fingertips Science
• 100 Percent Science
• CBSE 10 Years Chapterwise Topicwise Solved Papers AKA CBSE Champion
• CBSE Chapterwise Question Bank
• CBSE Score More 15 Sample Question Papers

We hope the MCQs for CBSE Class 10 Science Chapter 2 on Acid, Bases and Salt are helpful for your board exam preparation.