Class 10 Science Chapter 2 MCQ

Class 10 Science Chapter 2 MCQ (Multiple Choice Questions) of Acids, Bases and Salts. All the MCQs are taken from NCERT Textbooks issued for session 2021-2022. Answers and explanation of MCQ tests are given just below each questions.

MCQs are important for the CBSE and other boards final exams. It also clears the concepts about Acids, Bases and salts. So, practice here with MCQ test and prepare for school exams and board exams.

Class 10 Science Chapter 2 MCQ with Answers

Class: 10 Science
Chapter: 2MCQ (Multiple Choice Questions) test

Class 10 Science Chapter 2 MCQ Test 2021-2022

CBSE Class 10 Science Chapter 2 MCQ tests with answer and complete explanation of each answer. MCQs are important for most of the boards like UP Board, Bihar Board, MP Board as well as CBSE board. So, prepare your chapter with the following 20 sets of MCQs containing about 100 questions.




Q1

Paheli is writing some statements. She wants to know in which of the following statements is or are correct?

[A]. When a person happens to touch the leaves of a nettle plant accidently, the stinging hair of nettle leaves inject methanoic acid into the skin of the person causing burning pain.
[B]. An ant’s sting injects methanoic acid into the skin of a person causing burning pain.
[C]. When a wasp stings, it injects an alkaline liquid into the skin.
[D]. All the above
Q2

Identify the correct representation of reaction occurring during chloralkali process

[A]. 2NaCl(l) + 2H2O(l) → 2NaOH(l) + Cl2(g) + H2(g)
[B]. 2NaCl(aq) + 2H2O(aq) → 2NaOH(aq) + Cl2(g) + H2(g)
[C]. 2NaCl(aq) + 2H2O(l) → 2NaOH(aq) + Cl2(aq) + H2(aq)
[D]. 2NaCl (aq) + 2H2O (l) → 2NaOH (aq) + Cl2(g) + H2(g)
Q3

Which of the following statement is true for acids?

[A]. Bitter and change red litmus to blue
[B]. Sour and change red litmus to blue
[C]. Sour and change blue litmus to red
[D]. Bitter and change blue litmus to red
Q4

In which of the following statement is or are incorrect?

[A]. The common indicators cannot tell us the relative strengths of acids or bases.
[B]. To obtain an idea of how acidic or basic a substance is, universal indicator is used.
[C]. Universal indicator is a mixture of many different indicators (or dyes) which gives different colours at different pH values of the entire pH scale.
[D]. If a solution turns universal indicator yellow, then it will be a neutral solution (which is neither acidic nor basic).
Q5

Rahul is writing some statements, choose the incorrect statement and help him:

[A]. Hydrochloric acid is strong acid.
[B]. Sodium Hydroxide is a strong base.
[C]. Acetic acid is weak acid.
[D]. Magnesium hydroxide is a strong base.




Q6

Pornima is writing some statements but she confused to know whether the statements are correct or not? Would you help her?

[A]. Metal carbonates and metal hydrogen carbonates are also considered to be bases.
[B]. Sodium hydroxide is a base because it dissolves in water to produce hydroxide ions (alongwith sodium ions).
[C]. When the solution of a base is diluted by mixing more water in it, then the concentration of hydroxide ions (OH– ions) per unit volume decreases.
[D]. All the above.
Q7

The property which is not shown by acids is:

[A]. They have sour taste
[B]. They feel soapy
[C]. They turn litmus red
[D]. Their pH is less than seven
Q8

Nishant is writing some statements but he confused to know whether the statements are correct or not? Would you help him?

[A]. Sulphuric acid is used in the manufacture of fertilisers, paints, dyes, chemicals, plastics, synthetic fibres etc.
[B]. Nitric acid is used for making fertilisers, explosives etc.
[C]. Hydrochloric acid is used for removing oxide film from steel objects and used in dye-stuffs, textile, food and leather industries.
[D]. All the above.
Q9

Which of the following is acidic in nature?

[A]. Lime juice
[B]. Human blood
[C]. Baking soda
[D]. Antacid
Q10

Which of the following substances will not give carbon dioxide on treatment with dilute acid?

[A]. Marble
[B]. Limestone
[C]. Baking soda
[D]. Lime



Q11

Which of the following phenomena occur when a small amount of acid is added to water?

[A]. Ionisation, Neutralisation
[B]. Ionisation, Dilution
[C]. Neutralisation, Dilution
[D]. Neutralisation, Formation
Q12

Parmindar is writing some statements about polyester. In which of the following statements is or are incorrect? Help him.

[A]. Dilute hydrochloric acid reacts with copper (II) oxide to form copper (II) chloride and water.
[B]. Acids are never stored in metal containers or glass and ceramics because they gradually corrode and eat up the metal container.
[C]. The reaction between acids and metal oxides is a kind of “Neutralization reaction”.
[D]. Milk of Magnesia is a metal hydroxide called ‘magnesium hydroxide’ which is used to remove indigestion caused too much hydrochloric acid in the stomach.
Q13

Which of the following statements is correct about an aqueous solution of an acid and a base?

[A]. Higher the pH, stronger the acid, and Lower the pH, stronger the base.
[B]. Higher the pH, weaker the acid, and Lower the pH, stronger the base.
[C]. Higher the pH, stronger the acid, and Lower the pH, weaker the base.
[D]. Higher the pH, weaker the acid, and Lower the pH, weaker the base.
Q14

Consider the following statements and choose the correct statement(s):

[A]. Calcium carbonate reacts with dilute hydrochloric acid to form calcium chloride, carbon dioxide and water.
[B]. Calcium carbonate reacts with dilute sulphuric acid to form calcium sulphate, carbon dioxide and water.
[C]. When hydrochloric acid reacts with sodium hydroxide solution, then a neutralisation reaction takes place to form sodium chloride and water.
[D]. All the above
Q15

To protect tooth decay we are advised to brush our teeth regularly. The nature of toothpaste commonly used is

[A]. Acidic
[B]. Neutral
[C]. Basic
[D]. Corrosive



Q16

Pallavi is writing some statements. She wants to know in which of the following statements is or are incorrect?

[A]. The solutions of all the acids conduct electricity.
[B]. When carbon dioxide gas is passed through lime water, the lime water turns milky due to the formation of a white precipitate of sodium hydrogen-carbonate.
[C]. When dilute hydrochloric acid reacts with sodium carbonate, then sodium chloride, carbon dioxide and water are formed.
[D]. When dilute sulphuric acid reacts with zinc metal, then zinc sulphate and hydrogen gas are formed.
Q17

Common salt besides being used in kitchen can also be used as the raw material for making:

[A]. Washing soda, Bleaching soda
[B]. Washing soda, Bleaching soda, Slaked lime
[C]. Washing soda, Bleaching soda, Baking soda
[D]. Washing soda, Baking soda, Slaked lime
Q18

Sukhvir appeared in test of class 10th standard, where he wrote some statements but he confused to know the incorrect statement. Would you help him to know that?

[A]. A concentrated acid is one which contains the minimum possible amount of water in it.
[B]. A dilute acid is one which contains the much more amount of water in it.
[C]. When water is added to concentrated acid to dilute it then the heat is evolved gradually.
[D]. None of them
Q19

Which of the following statement is or are incorrect?

[A]. The acids present in plants materials and animals are called organic acids.
[B]. Organic acids are weak acids, so it is not harmful to eat or drink.
[C]. The acids prepared from the minerals of the earth are called mineral acids.
[D]. Concentrated mineral acids are weak acids, so they are not very dangerous.
Q20

Which of the following gives the correct increasing order of acid strength?

[A]. Water < acetic acid < hydrochloride acid.
[B]. Water < hydrochloride acid < acetic acid.
[C]. Acetic acid < water < hydrochloride acid.
[D]. Hydrochloride acid < water < acetic acid.



Q21

Payal is writing some statements, choose the correct statement and help him:

[A]. Sodium hydroxide solution turns red litmus to blue, so sodium hydroxide solution is basic in nature.
[B]. Methyl orange indicator gives red colour in acid solution, and yellow colour in basic solution.
[C]. Phenolphthalein indicator gives colourless in acid solution, and pink colour in basic solution.
[D]. All the above
Q22

Sodium carbonate is a basic salt because it is a salt of:

[A]. Strong acid and strong base
[B]. Weak acid and weak base
[C]. Strong acid and weak base
[D]. Weak acid and strong base
Q23

An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?

[A]. Baking Powder
[B]. Lime
[C]. Ammonium hydroxide solution
[D]. Hydrochloric acid
Q24

Which of the following salts does not contain water of crystallization?

[A]. Blue vitriol
[B]. Baking soda
[C]. Washing soda
[D]. Gypsum
Q25

During the preparations of hydrogen chloride gas on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of the calcium chloride taken in the guard tube is to:

[A]. Absorb the evolved gas.
[B]. Moisten the gas.
[C]. Absorb moisture from the gas.
[D]. Absorb Cl- ions from the evolved gas.




Find the correct answer of MCQ

Consider the following statements and choose the incorrect one:

    • [A] The red cabbage extract is also a natural indicator.
    • [B] The red cabbage extract remains red in acidic solution, but turns green on adding two basic solution.
    • [C] Those substances whose smell changes in acidic or basic solution are called olfactory indicators.
    • [D] The smell of the onion cannot be detected when it is added to an acidic solution.

ANSWER: [D]
Explanation: Onion has a characteristic smell. An acidic solution like hydrochloric acid, does not destroy the smell of onions. When a basic solution like sodium hydroxide solution is added to a cloth strip treated with onions, then the onions smell cannot be detected.

Find the correct answer of MCQ

A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowish-orange. Which of the following would change the colour of this pH paper to greenish-blue?

    • [A] Lemon Juice
    • [B] Vinegar
    • [C] Common salt
    • [D] An antacid

ANSWER: [D]
Explanation: Lemon juice is primarily a rich source of vitamin C which is citric acid.
Vinegar is a mixture of acetic acid and water. It is produced by acid acting bacteria. It is a mild acid.
Common salt is sodium chloride which has sodium ions and chloride ions. So, these three cannot change the pH paper to greenish blue as only base can bring this change.
Antacid is a base which is baking soda or sodium bicarbonate or sodium hydrogen carbonate which can change the pH paper from yellow orange to green while others are acidic in nature.