Which of the sulphide given below is not black in colour?

Options

A. NiS
B. CuS
C. CoS
D. CdS

Explanation

To determine which of the given sulphides is not black in color, we need to analyze each option:

1. **Nickel Sulphide (NiS)**: Nickel sulphide is known to be black in color.

2. **Copper Sulphide (CuS)**: Copper sulphide is also black in color.

3. **Cobalt Sulphide (CoS)**: Cobalt sulphide is typically described as black or dark in color, though it may appear slightly lighter than pure black.

4. **Cadmium Sulphide (CdS)**: Cadmium sulphide is known to be yellow in color, which distinguishes it from the other options.

Based on this analysis, the sulphide that is not black in color is **Cadmium Sulphide (CdS)**.

### Final Answer:
The sulphide that is not black in color is **Cadmium Sulphide (CdS)**.

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