MCQ practice · SSC Chemistry Board questions · Chapter 5: Chemical Bond
What is the latent valency of S in the compound H₂S?
Think it through first, then pick an option.
- a 6
- b 4
- c 2
- d 0
Answer and explanation
Correct answer: b 4
In H₂S the active valency is 2 (two H) and the highest is 6, so the latent valency is 6 − 2 = 4.
Why the other options are wrong
- a 6: 6 is sulfur's highest valency; the latent valency subtracts the active 2 from it, giving 4.
- c 2: 2 is the active valency in H₂S (two H); the latent valency is 6 − 2 = 4.
- d 0: 0 is for SO₃; in H₂S the active valency is only 2, so the latent valency is 6 − 2 = 4.
More board questions on this topic
- What is the latent valency of Fe in FeCl₃?
- Which shows variable valency?
- What is the latent valency of sulfur in sulfur trioxide?
- What is the latent valency of sulfur in SF₆?
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