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 2022-2023. 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 2022-2023

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

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)
Q2

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
Q3

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.
Q4

Anoop appeared in class test where he wrote some statements but he confused to know the incorrect statement. Would you help him to know that?

[A]. The strength of an acid or base is measured on a scale of numbers called the pH scale.
[B]. A substance having pH 7 will have no effect on litmus or any other common indicator such as methyl orange or phenolphthalein, etc.
[C]. A sugar solution and sodium chloride solution are also neutral, each having a pH of 7.
[D]. None of the above.
Q5

Match the chemical substances given in “Brackets”.

[A]. Bleaching powder (Production of H2 and Cl2), Baking soda (Preparation of glass), Washing soda (Antacid), Sodium chloride (Decolorization).
[B]. Bleaching powder (Decolorization), Baking soda (Production of H2 and Cl2), Washing soda (Antacid), Sodium chloride (Preparation of glass).
[C]. Bleaching powder (Decolorization), Baking soda (Antacid), Washing soda (Preparation of glass), Sodium chloride (Production of H2 and Cl2).
[D]. Bleaching powder (Production of H2 and Cl2), Baking soda (Antacid), Washing soda (Preparation of glass), Sodium chloride (Decolorization).
Q6

Which among the following is not a base?

[A]. NaOH
[B]. KOH
[C]. NH4OH
[D]. C2H5OH
Q7

Which of the following is not a mineral acid?

[A]. Hydrochloride acid
[B]. Citric acid
[C]. Sulphuric acid
[D]. Nitric acid
Q8

10 mL of a solution of NaOH is found to be completely neutralized by 8 mL of a given solution of HCl. If we take 20 mL of the same solution of NaOH, the amount of HCl solution (the same solution as before) required to neutralize it will be:

[A]. 4 mL
[B]. 8 mL
[C]. 12 mL
[D]. 16 mL
Q9

Which of the following is acidic in nature?

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

Which one of the following can be used as an acid-base indicator by a visually impaired student?

[A]. Litmus
[B]. Turmeric
[C]. Vanilla essence
[D]. Petunia leaves
Q11

Consider the following statements, choose the incorrect one:

[A]. The strong bases (or alkalis) such as sodium hydroxide are also very corrosive, and attack and destroy our skin.
[B]. An acid is a substance which dissociates on dissolving in water to produce hydrogen ions.
[C]. The compounds such as glucose and alcohol also contain hydrogen but they do not show acidic character.
[D]. Only sulphuric acid and hydrochloric acid solution conducts electricity.
Q12

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.
Q13

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
Q14

In a science exam, you are asked a question where you have to choose the statement which is/ are incorrect?

[A]. Curd and other sour foodstuffs such as vinegar, lemon juice and orange juice, etc., should not be kept in metal vessels like copper vessels.
[B]. If someone is suffering from the problem of acidity after over eating, we can suggest taking baking soda solution as remedy.
[C]. Egg-shells, limestone, marble and chalk are the different forms calcium carbonate.
[D]. None of the above
Q15

One of the constituents of baking powder is sodium hydrogen carbonate, the other constituent is

[A]. Hydrochloric acid
[B]. Tartaric acid
[C]. Acetic acid
[D]. Sulphuric acid
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

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
Q18

Sodium hydrogen carbonate, when added to acetic acid, evolves a gas. Which of the following statements are true about the gas evolved?

[A]. It turns lime water milky, and it extinguishes a burning splinter.
[B]. It turns lime water milky, and it extinguishes a burning splinter, and it dissolves in a solution of sodium hydroxide.
[C]. It extinguishes a burning splinter, it dissolves in a solution of sodium hydroxide, and it has a pungent odour.
[D]. It turns lime water milky, and it has a pungent odour.
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

Consider the following statement and choose the incorrect one:

[A]. An indicator is a dye that changes colour when it is put into an acid or a base.
[B]. The most common indicators to test for acids and bases are litmus, methyl orange and phenolphthalein.
[C]. The most common indicator used for testing acids and bases in the laboratory is phenolphthalein.
[D]. None of the above
Q23

Calcium phosphate is present in tooth enamel. Its nature is

[A]. Basic
[B]. Acidic
[C]. Neutral
[D]. Amphoteric
Q24

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
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.