10th class Chemistry, Chapter 19: Nitrogen and Sulphur MCQs

1. The reason for maintaining higher temperature for the production of ammonia is:

1. (A) activation energy of the reaction is very high. ✓
2. (B) activation energy of the reaction is very low.
3. (C) nitrogen and hydrogen are both gases.
4. (D) at low temperature nitrogen and hydrogen change into liquids.

2. The contact process is sensitive to the impurities present in SO₂ and O₂ because the impurities:

1. (A) affect the capability of the catalyst ✓
2. (B) affect the purity of H₂SO₄
3. (C) do not let SO₂ to react with oxygen
4. (D) decrease the rate of reaction appreciably

3. Which of the following oxides is neutral in character?

1. (A) Al₂O₃
2. (B) SO₂
3. (C) CO₂
4. (D) NO ✓

4. Sodium is considered more reactive than magnesium because:

1. (A) It is more electropositive than magnesium ✓
2. (B) It reacts with water slowly.
3. (C) It is present in second group
4. (D) It is the less metallic

5. Secondary pollutants present in the atmosphere are:

1. (A) Oxides of nitrogen
2. (B) Oxides of Sulphur
3. (C) Ozone and PAN ✓
4. (D) Oxides of Carbon

6. SO₃ is absorbed in H₂SO₄ rather than H₂O during the production of sulphuric acid because:

1. (A) SO₃ does not react with H₂O
2. (B) reaction of SO₃ with H₂O is highly exothermic producing mist of H₂SO₄ which is difficult to condense. ✓
3. (C) It gives better yield of H₂SO₄
4. (D) reaction of SO₃ with H₂O can cause explosion.

7. Oxides formed when oxygen reacts with metals:

1. (A) Acidic
2. (B) Basic
3. (C) Both basic and amphoteric ✓
4. (D) Neutral

8. Major components of acid rain are:

1. (A) H₂SO₄ and HNO₃ ✓
2. (B) H₂SO₃ and HNO₂
3. (C) H₂SO₄ and HCl
4. (D) Acetic acid and HNO₃

9. About ____ of the ammonia produced in industries is used to produce fertilizers.

1. (A) 20%
2. (B) 50%
3. (C) 80% ✓
4. (D) 100%

10. The Haber process was discovered by:

1. (A) Avogadro
2. (B) F.J. Haber ✓
3. (C) Charles
4. (D) Boyle

11. In the Haber process nitrogen and hydrogen are mixed in the ratio of ____ by volume.

1. (A) 3:1
2. (B) 1:3 ✓
3. (C) 1:1
4. (D) 2:1

12. The catalyst used in the Haber process is:

1. (A) Fe/Al₂O₃ ✓
2. (B) Pt
3. (C) Ni
4. (D) V₂O₅

13. The equilibrium mixture of the Haber process contains ____ ammonia by volume.

1. (A) 15%
2. (B) 25%
3. (C) 35% ✓
4. (D) 75%

14. In the Haber process ammonia is liquefied at:

1. (A) -33.4 °C ✓
2. (B) -196 °C
3. (C) 0 °C
4. (D) 100 °C

15. The boiling point of nitrogen is ____ than that of oxygen.

1. (A) double
2. (B) equal
3. (C) less ✓
4. (D) greater

16. Nitrogen evaporates first from liquid air at:

1. (A) -33 °C
2. (B) -100 °C
3. (C) -196 °C ✓
4. (D) 0 °C

17. Hydrogen for the Haber process is produced by heating:

1. (A) water only
2. (B) air
3. (C) methane ✓
4. (D) ethane

18. Sulphuric acid is prepared industrially by the:

1. (A) Haber process
2. (B) Solvay process
3. (C) electrolysis
4. (D) contact process ✓

19. Iron pyrite is:

1. (A) FeS₂ ✓
2. (B) FeS
3. (C) FeSO₄
4. (D) Fe₂O₃

20. The catalyst used in the contact process is:

1. (A) nickel
2. (B) iron
3. (C) platinum
4. (D) vanadium (V) oxide ✓