UPSC CDS 1 2023 GK Paper

© examsiri.com

Question : 113 of 120

Marks: +1, -0

Naphthalene burns with a yellow sooty flame. This is because

carbon to hydrogen ratio is low
there is incomplete combustion
there is excess supply of air
of presence of impurities of nitrogen and sulfur

Go to Question:

Prev Question

Next Question