ICSE Chemistry MCQs
ICSE Chemistry – Ammonia
1. What is the molecular formula of ammonia?
A) NH₄
B) NH₃
C) N₂H₄
D) NO₃
Answer: B) NH₃
2. Ammonia is a:
A) Colourless gas with a pungent smell
B) Yellow gas with a sweet smell
C) Blue liquid
D) Colourless liquid with no smell
Answer: A) Colourless gas with a pungent smell
3. Ammonia is highly soluble in:
A) Kerosene
B) Water
C) Benzene
D) Carbon tetrachloride
Answer: B) Water
4. The laboratory preparation of ammonia involves heating:
A) Sodium chloride with sulphuric acid
B) Ammonium chloride with calcium hydroxide
C) Ammonium nitrate with water
D) Nitrogen with hydrogen
Answer: B) Ammonium chloride with calcium hydroxide
5. The drying agent commonly used for ammonia is:
A) Concentrated H₂SO₄
B) Anhydrous CaCl₂
C) Quicklime (CaO)
D) P₂O₅
Answer: C) Quicklime (CaO)
6. Ammonia cannot be dried using concentrated sulphuric acid because it:
A) Is insoluble in H₂SO₄
B) Reacts with H₂SO₄
C) Decomposes H₂SO₄
D) Evaporates H₂SO₄
Answer: B) Reacts with H₂SO₄
7. The gas collected in the laboratory preparation of ammonia is collected by:
A) Downward displacement of water
B) Upward displacement of air
C) Downward displacement of air
D) Over mercury
Answer: C) Downward displacement of air
8. Ammonia is lighter than:
A) Hydrogen
B) Oxygen
C) Helium
D) Nitrogen
Answer: B) Oxygen
9. Ammonia turns moist red litmus paper:
A) Blue
B) Green
C) Yellow
D) White
Answer: A) Blue
10. The aqueous solution of ammonia is commonly called:
A) Ammonium hydroxide
B) Ammonium chloride
C) Ammonium nitrate
D) Ammonium sulphate
Answer: A) Ammonium hydroxide
11. Ammonia reacts with hydrogen chloride gas to form:
A) NH₄OH
B) NH₄Cl
C) N₂
D) H₂
Answer: B) NH₄Cl
12. The reaction between NH₃ and HCl produces:
A) Brown fumes
B) White fumes
C) Green fumes
D) No visible change
Answer: B) White fumes
13. Ammonia is a:
A) Strong acid
B) Weak acid
C) Strong alkali
D) Weak alkali
Answer: D) Weak alkali
14. The catalyst used in the Haber process is mainly:
A) Copper
B) Iron
C) Nickel
D) Platinum
Answer: B) Iron
15. The Haber process is used for the manufacture of:
A) Nitric acid
B) Ammonia
C) Sulphuric acid
D) Hydrochloric acid
Answer: B) Ammonia
16. The reactants used in the Haber process are:
A) Nitrogen and oxygen
B) Nitrogen and hydrogen
C) Hydrogen and oxygen
D) Nitrogen and chlorine
Answer: B) Nitrogen and hydrogen
17. The balanced equation for the Haber process is:
A) N₂ + H₂ → NH₃
B) N₂ + 2H₂ → 2NH₃
C) N₂ + 3H₂ ⇌ 2NH₃
D) 2N₂ + H₂ ⇌ 2NH₃
Answer: C) N₂ + 3H₂ ⇌ 2NH₃
18. In the Haber process, increasing pressure favours the formation of:
A) Nitrogen
B) Hydrogen
C) Ammonia
D) Oxygen
Answer: C) Ammonia
19. Ammonia reacts with oxygen in the presence of platinum to form:
A) Nitrogen dioxide directly
B) Nitric oxide and water
C) Nitrogen and water
D) Nitric acid directly
Answer: B) Nitric oxide and water
20. The oxidation of ammonia in the Ostwald process is carried out using:
A) Copper catalyst
B) Iron catalyst
C) Platinum catalyst
D) Zinc catalyst
Answer: C) Platinum catalyst
21. Ammonia can reduce heated metal oxides such as:
A) CuO
B) Na₂O
C) K₂O
D) CaO
Answer: A) CuO
22. When ammonia reacts with copper(II) oxide on heating, the black CuO changes to:
A) Green copper carbonate
B) Reddish-brown copper
C) Blue copper sulphate
D) White copper chloride
Answer: B) Reddish-brown copper
23. Ammonia is used in the manufacture of:
A) Fertilisers
B) Glass only
C) Cement only
D) Sodium chloride
Answer: A) Fertilisers
24. Which property of ammonia makes it suitable for fountain experiment?
A) It is highly soluble in water
B) It is heavier than water
C) It is insoluble in water
D) It is a liquid at room temperature
Answer: A) It is highly soluble in water
25. Which of the following is NOT a property of ammonia?
A) It has a pungent smell
B) It is highly soluble in water
C) It is a basic gas
D) It is heavier than air
Answer: D) It is heavier than air
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