Question

Which of the following flames is produced by a candle?

• A. Blue flame
• B. Non-luminous flame
• C. Light giving flame
• D. Yellow luminous flame

Answer 1

The correct option is D

Yellow luminous flame

Explanation for the correct option-

Option (D)

1. Yellow luminous flame requires either a shortage of combustion air or a local excess.
2. Candle burns with yellow flame because of the burning of low energy fuel in low oxygen content.
3. So, a Yellow luminous flame is produced by a candle.

Explanation for the incorrect options-

1. Option (A) Blue flame- It means complete combustion. Example- L.P.G.
2. Option (B) Non-luminous flame- A blue-colored flame that produces very little light.
3. Option (C) Light giving flame- It is a burning flame that is visible and gives light.

Hence, option (D) is the correct answer.