Question

Which from following elements is NOT present in mustard gas?

• A. \(\text{Cl}\)
• B. \(\text{N}\)
• C. \(\text{S}\)
• D. \(\text{C}\)

Hint:

Mustard gas is \(\text{ClCH}_2\text{CH}_2\text{-S-CH}_2\text{CH}_2\text{Cl}\), so it has no nitrogen.

Answer 1

The Correct Option is B

Step 1: Write the formula
$\text{C}_4\text{H}_8\text{Cl}_2\text{S}$.

Step 2: Check elements
C, H, Cl and S are all present. N is not, so the answer is (B).

Final Answer:
Mustard gas has Cl, S and C but no N, option (B). \[ \boxed{\text{N}} \]