MCQ practice · SSC Chemistry Board questions · Chapter 12: Chemistry in Our Lives
2NH₃ + H₂SO₄ → A + H₂O; compound A-
- i. has molar mass 132
- ii. plants take nitrogen and sulphur from it
- iii. is used on soil when soil pH > 7
Think it through first, then pick an option.
- a i and ii
- b ii and iii
- c i and iii
- d i, ii and iii
Answer and explanation
Correct answer: d i, ii and iii
A = (NH₄)₂SO₄: mass 132, gives plants N and S, used on alkaline soil.
Why the other options are wrong
- a i and ii: iii is true too: A is applied when soil pH is above 7, that is, alkaline.
- b ii and iii: i is true too: (NH₄)₂SO₄ has molar mass 2 × 18 + 32 + 64 = 132.
- c i and iii: ii is true too: plants get nitrogen and sulphur from A.
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