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

Which of the following statement is or are incorrect?

[A]. Our body works well within a narrow pH range of 7.0 to 7.8.
[B]. When the pH of rain water is about 5.6, it is called acid rain.
[C]. If the soil is too acidic (having low pH), then it is treated with materials like quicklime (calcium oxide) or slaked lime (calcium hydroxide) or chalk (calcium carbonate).
[D]. Most of the plants grow best when the pH of the soil is close to 4.
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

Which of the following is/are true when HCl (g) is passed through water?

[A]. It does not ionise in the solution as it is a covalent compound.
[B]. It gives both hydrogen and hydroxyl ion in the solution.
[C]. It ionises in the solution, and it forms hydronium ion in the solution due to the combination of hydrogen ion with a water molecule.
[D]. It gives both hydrogen and hydroxyl ion in the solution, and it forms hydronium ion in the solution due to the combination of hydrogen ion with a water molecule.
Q4

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).
Q5

In which of the following statements is or are incorrect?

[A]. The solutions having pH values of 8, 9 and 10 are usually considered weak bases (or weak alkalis).
[B]. The solutions having pH values of 11, 12, 13, and 14 are usually considered strong bases (or strong alkalis).
[C]. The solutions having pH of 0, 1, 2 and 3 are usually considered to be strong acids.
[D]. The solutions having pH of 4, 5 and 6 are considered to be neutral solutions.
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

Which of the following is used for dissolution of gold?

[A]. Hydrochloride acid
[B]. Sulphuric acid
[C]. Nitric acid
[D]. Aqua- regia
Q8

Which of the following is acidic in nature?

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

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
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

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

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
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

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

If a few drops of concentrated acid accidentally spill over the hand of a student, what should be done?

[A]. Wash the hand with saline solution.
[B]. Wash the hand immediately with plenty of water and apply a paste of sodium hydrogen carbonate.
[C]. After washing with plenty of water apply solution of sodium hydroxide on the hand.
[D]. Neutralise the acid with a strong alkali.
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

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.