Which of the following anions has a valency of -3?
- A. Nitride ✓
- B. Nitrate
- C. Sulphide
- D. Sulphate
Correct Answer: A. Nitride
Explanation
The nitride ion (N^{3-}) has a valency of -3. Nitrate is -1, sulphide is -2, and sulphate is -2.
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