NCERT Class 10 Chapter 2 Acids; Bases and Salts CBSE Board Sample Problems Multiple Choice Question

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Question

A sample of soil is mixed with water and allowed to. 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 settle

c) Common Salt

d) Antacid

Question

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

a) BIue Vitriol

b) Baking soda

c) Washing soda

d) Gypsum

Question

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

a) Litmus

b) Turmeric

c) Vanilla Essence

d) Petunia leaves

Question

Which Phenomena occurs when a small amount acid is added to water:

i) Ionization

ii) Neutralize

iii) Dilution

iv) Format of

a) ¡ and ii

b) ¡and iii

c) ii and iii

d) ii and iv

Question

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

a) Hydrochloric acid

b) Tartaric acid

c) Acetic acid

d) Sulphuric acid

Question

Which among the following is not a base:

a) NaOH

b) KOH

c)

d)

Question

Zinc granules on treating with an acid X, form the zinc sulphate () salt along with the evolution of a gas Y which burns with a pop sound when brought near to a burning candle. Identify the acid X and gas evolved Y.

1. X- Sulphuric acid and Y- Oxygen gas

2. X- Hydrochloric acid and Y- Oxygen gas

3. X- Sulphuric acid and Y- Hydrogen gas

4. X- Hydrochloric acid and Y- Hydrogen gas

Question

Some fruits like mango, lemon, raw grapes, orange, etc., have a sour taste due to the presence of:

1. Acetic acid

2. Citric acid

3. Lactic acid

4. Oxalic acid

Question

Which of the following solutions in water does not conduct electricity?

1. Hydrochloric acid

2. Sodium chloride

3. Glucose

4. Sulphuric acid

Question

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

1. Copper sulphate

2. Gypsum

3. Washing soda

4. Baking soda

Question

Which of the following will turn Phenolphthalein pink?

Question

Zinc reacts with NaOH to form the following products:

4.

Question

Meena rubbed the yellow coloured turmeric stain on his son’s shirt with soap. She observed the colour of the stain became:

1. Pink

2. Remained yellow

3. Reddish brown

4. White

Question

In which of the following solutions, would the colour of pH strip change to dark blue?

1. HCI

2. NaOH

3. Lemon juice

4. Ethanoic acid

Question

For the given question numbers, two statements are given one labeled Assertion (A) and the other labeled Reason (R). Select the correct answer to these questions from the codes (i), (ii), (iii) and (iv) as given below-

(1) Assertion: While Dissolving an acid in water, the water must always be added slowly to constant stirring,

Reason: Dissolving an acid in water is a acid highly exothermic reaction.

1. Both A and R are true and R is correction explanation of the assertion.

2. Both A and R are true and R is not the correct explanation of the assertion

3. A ¡s true but R is false

4. A is false but R is true

Question

The compound formed during electrolysis of brine is: (1)

3. NaOH

4. NaH

Question

For the given question two statements are given — one labeled Assertion (A) and the other labeled Reason (R). Select the correct answer to these questions from codes (i), (ii), (iii) and (iv) as given below

Assertion (A): Weak acids have low electrical conductivity.

Reason (B): Weak acids dissociate completely to produce hydrogen ions in solution.

(ii) Both A and R are true and R is correct explanation of the assertion

(i) Both A and R are true but R is not the correct explanation of the assertion..

(iii) A is true but R is false.

(iv) A is false but R is true