Acids, Bases and Salts

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Acids, Bases and Salts - 2

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Q1. Zinc granules on treating with an acid X, form the zinc sulphate (ZnSO4) 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 point

a. X- Sulphuric acid and Y- Oxygen gas

b. X- Hydrochloric acid and Y- Oxygen gas

c. X- Sulphuric acid and Y- Hydrogen gas

d. X- Hydrochloric acid and Y- Hydrogen gas

Q2. The figure given below represents the experiment carried out between conc. sulphuric acid and sodium chloride, which react with each other to form HCl gas. Blue litmus paper is brought near the mouth of the delivery tube to check the presence of HCl acid but no change is observed in the color of litmus paper because: *

1 point

a. The litmus paper used is dry

b. The litmus paper used is moist

c. Blue litmus paper does not change its color with an acid

d. The litmus paper is kept very close to the mouth of the delivery tube

Q3. Which of the following phenomena occur, when a small amount of acid is added to water? i. Ionisation ii. Neutralisation iii. Dilution iv. Salt formation *

1 point

(i) and (ii)

(i) and (iii)

(ii) and (iii)

(ii) and (iv)

Q4. Which of the following indicators turn red in an acidic solution? i. Phenolphthalein ii. Litmus iii. Turmeric iv. Methyl orange *

1 point

(i) and (ii)

(ii) and (iii)

Only (ii)

(ii) and (iv)

Q5. Dilute acid does not produce carbon dioxide on being treated with: *

1 point

a. Marble

b. Lime

c. Baking soda

d. Limestone

Q6. The sample of soil from a particular place was tested for its pH value. It came out to be 5. Which one of the following should be added to the soil to make it suitable for the plant growth? i. Calcium chloride ii. Calcium Hydroxide iii. Calcium oxide Choose the correct option: *

1 point

Both (i) and (ii)

Both (ii) and (iii)

Only (i)

Only (iii)

Q7. Identify the products of the following reaction: *

1 point

a. Calcium hydrogencarbonate and chlorine gas

b. Calcium chloride and water

c. Calcium oxide, carbon dioxide and water

d. Calcium chloride, carbon dioxide and water

Q8. An ant’s sting can be treated with …………which will neutralise the effect of the chemical injected by the ant’s sting into our skin.Choose the correct option from the following to be filled in the blank space: *

1 point

a. Methanoic acid

b. formic acid

c. Baking soda

d. Caustic soda

Q9. In the following reaction, identify the salt formed NH4OH (aq) + H2SO4 (aq) → _____ + 2H2O (l) *

1 point

a. NH4NO3

b. (NH4)2SO4

c. (NH4)3PO4

d. (NH4)2S

Q10. Which of the following salt will give acidic solution when dissolved in water? *

1 point

a. NH4Cl

b. NaCl

c. Na2CO3

d. CH3COONa

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