10 Question MCQ (including Assertion)

Question 1 of 10

NCERT Exemplar

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

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Question 2 of 10

NCERT Exemplar

What happens when a solution of an acid is mixed with a solution of a base in a test tube?
(i) The temperature of the solution increases (ii) The temperature of the solution decreases
(iii) The temperature of the solution remains the same (iv) Salt formation takes place

A (i) only B (i) and (iii) C (ii) and (iii) D (i) and (iv)

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Question 3 of 10

NCERT Exemplar

Sodium hydrogen carbonate when added to acetic acid evolves a gas.
Which of the following statements are true about how the gas evolved?
(i) It turns lime water milky
(ii) It extinguishes a burning splinter
(iii) It dissolves in a solution of sodium hydroxide
(iv) It has a pungent odour

A (i) and (ii) B (i), (ii) and (iii) C (ii), (iii) and (iv) D (i) and (iv)

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Question 4 of 10

NCERT Exemplar

Calcium phosphate is present in tooth enamel. Its nature is

A basic B acidic C neutral D amphoteric

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Question 5 of 10

NCERT Exemplar

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

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Question 6 of 10

NCERT Exemplar

An aqueous solution turns the red litmus solution blue. Excess addition of which of the following solutions would reverse the change?

A Baking powder B Lime C Ammonium hydroxide solution D Hydrochloric acid

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Question 7 of 10

NCERT Exemplar

If a few drops of a concentrated acid accidentally spills 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

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Question 8 of 10

NCERT Exemplar

During the preparation of hydrogen chloride gas on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of 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

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Question 9 of 10

NCERT Exemplar

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

A Water B Water C Acetic acid D Hydrochloric acid

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Question 10 of 10

NCERT Exemplar

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

A Blue vitriol B Baking soda C Washing soda D Gypsum

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10 Question MCQ (including Assertion)