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Sulphide ion is soft base and its ores are common metals. (a) Pb (b) Al (c) Ag (d) Mg Choose the correct answer from the options given below :

1. (1) (a) and (c) only
2. (2) (a) and (d) only
3. (3) (a) and (b) only
4. (4) (c) and (d) only

Correct answer: (3) (a) and (b) only

Solution

The sulphide ion acts as a soft base and tends to bond with soft acids, which are typically found in metals like lead (Pb) and aluminum (Al). These metals have properties that align with the characteristics of soft acids, making them suitable for forming compounds with sulphide ions.

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