Question

Among the following the correct statements are:
I. Carbon black is obtained by burning hydrocarbons in a limited supply of air
II. Carbon black is obtained by burning hydrocarbons in absence of air
III. Coke is obtained by burning coal at high temperatures in a limited supply of air
IV. Coke is obtained by burning coal at high temperatures in absence of air

• A. I, IV only
• B. II, III only
• C. II, IV only
• D. I, III only

Hint:

Remember: Coke → absence of air; Carbon black → limited supply of air.

Answer 1

The Correct Option is A

- Carbon black is made by incomplete combustion (limited air), not in absence of air. ⇒ I is correct, II is wrong.
- Coke is obtained by heating coal strongly in the absence of air (destructive distillation), not in limited supply ⇒ IV is correct, III is incorrect.