Set-1 Set-2 Set-3 Set-4 Set-5

Set 3

1. What is the other name for quick lime?

(a) Calcium hydroxide
(b) Calcium oxide
(c) Carbon dioxide
(d) Sodium oxide

2. Which of the given products is formed when calcium oxide reacts with water?

(a) Slaked lime
(b) Carbon dioxide
(c) Calcium oxide
(d) Oxygen

3. When crystals of lead nitrate are heated strongly in a dry test tube

(a) Crystals immediately melt
(b) A brown residue is left
(c) White fumes appear in the tube
(d) A yellow residue is left

4. Both CO₂ and H₂ gases are

(a) Heavier than air
(b) Colorless
(c) Acidic in nature
(d) Soluble in water

5. The chemical formula of lead sulphate is

(a) Pb₂SO₄
(b) Pb(SO₄)₂
(c) PbSO₄
(d) Pb₂(SO₄)₃

6. Fatty foods become rancid due to the process of

(a) Oxidation
(b) Corrosion
(c) Reductuon
(d) Hydrogenation

7. Which information is not conveyed by a balanced chemical equation?

(a) Physical states of reactants and products
(b) Symbols and formulae of all the substances involved in a particular reaction
(c) Number of atoms/molecules of the reactants and products formed
(d) Whether a particular reaction is actually feasible or not

8. Which of the following statements about the given reaction are correct? 3Fe(s) + 4H₂O(g) → Fe₃O₄ (s) + 4H₂ (g)

(A) Iron metal is getting oxidized.
(B) Water is getting reduced.
(C) Water is acting as reducing agent.
(D)Water is acting as oxidizing agent.

(a) (A), (B) & (C)
(b) (C) & (D)
(c) (A), (B) & (D)
(d) (B) & (D)

9. Consider reaction is an example of 4NH₃ (g) + 5O₂ (g) → 4NO (g) + 6H₂O (g)

(A) Displacement reaction
(B) Combination reaction
(C) Redox reaction
(D) Neutralization reaction.

(a) (A) & (D)
(b) (B) & (C)
(c) (A) & (C)
(d) (C) & (D)

10. In which of the given, heat energy will be evolved?

(a) Electrolysis of water
(b) Dissolution of NH₄Cl in water
(c) Burning of L.P.G.
(d) Decomposition of AgBr in the presence of sunlight
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