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?

Here, all the statements are correct. Hence, your answer will be option [D].

Match the chemical substances given in “Brackets”.

Firstly, Bleaching powder (CaOCl2) is used bleach clothes and removes colour from clothes. It decomposes on reaction with water and releases chlorine which acts as oxidising, bleaching and disinfecting agent. Baking soda is a natural antacid. It is used to relieve acidity in stomach and heart burn. Washing soda is used in the preparation of glass, soap and paper industries. Sodium chloride is used to produce H2 and Cl2 gases. And lastly, Aqueous sodium chloride on electrolysis yields hydrogen and chlorine.

Consider the given statements and choose the incorrect one:

Sodium oxide (Na2O) is a metal oxide, so it is a base; and sodium hydroxide (NaOH) is a metal hydroxide, so it is also a base.

Which of the following is used for dissolution of gold?

Aqua-regia is used for the dissolution of gold. It is a solution of concentrated HNO3 and concentrated HCl in the ratio of 1:3. Thus this solution is strongly acidic and is used to dissolve gold.

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

Here, all the statements are correct. Hence, your answer will be option [D].

Which of the following is acidic in nature?

Lime juice is acidic in nature. It has high amount of citric acid present in it.

Which of the following statement is or are correct?

Here, all the statements are incorrect except one. Hence, your answer will be option [D]. Sulphuric acid (H2SO4) and nitric acid (HNO3) are also strong acids. Carbonic acid (H2CO3) and sulphurous acid (H2SO3) are also weak acids. Strong acids also have a high electrical conductivity.

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

Generally, acids are stored in containers made of glass and ceramics because they are not attacked by acids. Acids are never stored in metal containers because they gradually corrode and eat up the metal container.

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

Baking powder is a mixture of baking soda NaHCO3 (sodium hydrogen carbonate) and a mild edible acid such as tartaric acid. When baking powder is mixed with water, sodium hydrogen carbonate reacts with tartaric acid and accepts hydrogen ions from it. This process releases carbon dioxide gas which is trapped in the dough when baking powder is used to make bread and cake.

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

The increasing order of acid strength is water < acetic acid < hydrochloride acid. Hydrochloride acid is a mineral acid and ionises completely in water. That’s why it is a strong acid. Acetic acid is an organic acid and ionises only partially in water. That’s why it is a weak acid. Water is almost neutral in nature. In pure water number of positive hydrogen ions is equal to the negative ions.

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

Here, all the statements are correct. Hence, your answer will be option [D].

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:

Calcium chloride is a good dehydrating agent. It absorbs moisture or water content from the gas making it dry. Calcium chloride is widely used in many industries due to its ability to absorb water.

Class 10 Science Chapter 2 MCQ of Acids, Bases and Salts for 2024-25

Updated on January 27, 2022
by Tiwari Academy

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 2024-25. 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: 2	MCQ (Multiple Choice Questions) test

Class 10 Science Chapter 2 MCQ Test 2024-25

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.

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)

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

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

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).

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.

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.

Which among the following is not a base?

[A]. NaOH

[B]. KOH

[C]. NH4OH

[D]. C2H5OH

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

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

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

[A]. In the absence of water, a substance will not form hydrogen ions and hence will not show its acidic behaviour.

[B]. Hydrochloric acid is completely ionised in water, so it is a weak acid.

[C]. Dry, HCl gas does not change the colour of dry blue litmus paper because it has no hydrogen ions.

[D]. The HCl gas turns ‘wet’ blue litmus paper red because it dissolves in the water present in wet litmus paper to form hydrogen ions.

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

The pH of the gastric juices released during digestion is

[A]. Less than 7

[B]. More than 7

[C]. Equal to 7

[D]. Equal to 0

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

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

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

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

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

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

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

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

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

[A]. Blue vitriol

[B]. Baking soda

[C]. Washing soda

[D]. Gypsum

Start a New Test

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.

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Last Edited: January 27, 2022