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

Which of the following are present in a dilute aqueous solution of hydrochloride acid?

[A]. H3O+ + Cl-
[B]. H3O+ + OH-
[C]. Cl- + OH-
[D]. Unionised HCl
Q2

Consider the following statements, choose the incorrect one:

[A]. Dilute hydrochloric acid causes indigestion of food.
[B]. Tooth decay starts when the pH of acid formed in the mouth falls below 5.5.
[C]. Being basic in nature, antacids react with excess acid in the stomach and neutralize it.
[D]. The bacteria present in our mouth break down the sugar to form acids (such as lactic acid).
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

Which of the following statements is not correct?

[A]. All metal carbonates react with acid to give a salt, water and carbon dioxide.
[B]. All metal oxides react with water to give salt and acid.
[C]. Some metal reacts with acids to give salt and hydrogen.
[D]. Some non-metal oxides react with water to from an acid.




Q6

Which of the following is not a mineral acid?

[A]. Hydrochloride acid
[B]. Citric acid
[C]. Sulphuric acid
[D]. Nitric acid
Q7

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.
Q8

Which of the following is acidic in nature?

[A]. Lime juice
[B]. Human blood
[C]. Baking soda
[D]. Antacid
Q9

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

[A]. Marble
[B]. Limestone
[C]. Baking soda
[D]. Lime
Q10

In which of the following statement is or are incorrect?

[A]. Rain water conducts electricity.
[B]. Distilled water does not conduct electricity.
[C]. Glucose solution conduct electricity.
[D]. Alcohol solution also does not conduct electricity.



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

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



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

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.
Q20

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.




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

Calcium phosphate is present in tooth enamel. Its nature is

[A]. Basic
[B]. Acidic
[C]. Neutral
[D]. Amphoteric
Q23

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
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.