Which of the following sulphides is yellow in colour ?

Options

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

Explanation

To determine which of the following sulphides is yellow in color, we can analyze the color of each sulphide mentioned. Here’s a step-by-step solution:

### Step 1: Identify the sulphides mentioned
Let's assume the sulphides provided in the options are:
1. CuS (Copper(II) Sulphide)
2. ZnS (Zinc Sulphide)
3. CdS (Cadmium Sulphide)

### Step 2: Analyze the color of each sulphide
- **CuS (Copper(II) Sulphide)**: This compound is known to be black in color.
- **ZnS (Zinc Sulphide)**: This compound is typically white in color.
- **CdS (Cadmium Sulphide)**: This compound is known to be yellow in color.

### Step 3: Eliminate the options
From the analysis:
- CuS is black, so it cannot be the answer.
- ZnS is white, so it cannot be the answer.
- CdS is yellow, which matches the requirement of the question.

### Step 4: Conclusion
The sulphide that is yellow in color is **CdS (Cadmium Sulphide)**.

### Final Answer:
**CdS (Cadmium Sulphide)** is the yellow sulphide.

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