A brief information about a few substances is given as :
X It is the residue left behind after destructive distillation of coal.
Y : It is a mixture of hydrogen, methane, carbon monoxide and other gases.
Z : It contains several carbon compounds which are used to make pesticides, explosives, synthetic fibres, perfumes, etc.
X, Y and Z are respectively

Options

A. Kerosene, CNG and ammoniacal liquor
B. Bitumen, coal gas and coal tar
C. Coke, coal gas and coal tar
D. Petrol, CNG and bitumen.

Explanation

To solve the question, we need to identify the substances X, Y, and Z based on the descriptions provided.

### Step-by-Step Solution:

1. **Identify Substance X**:
- The question states that X is the residue left behind after the destructive distillation of coal.
- In the process of destructive distillation, coal is heated in the absence of air, leading to the formation of several products.
- The solid residue that remains after this process is known as **coke**.

**Conclusion**: X = Coke

2. **Identify Substance Y**:
- The question describes Y as a mixture of hydrogen, methane, carbon monoxide, and other gases.
- This mixture is produced during the destructive distillation of coal and is commonly referred to as **coal gas**.

**Conclusion**: Y = Coal gas

3. **Identify Substance Z**:
- The description for Z states that it contains several carbon compounds used to make pesticides, explosives, synthetic fibers, perfumes, etc.
- This substance is derived from the tar produced during the destructive distillation of coal, known as **coal tar**.

**Conclusion**: Z = Coal tar

4. **Final Answer**:
- Therefore, the substances X, Y, and Z are:
- X = Coke
- Y = Coal gas
- Z = Coal tar

### Final Answer:
X, Y, and Z are respectively Coke, Coal gas, and Coal tar.

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