Question

Question 15
Shyam was cooking potato curry on a chulha. To his surprise, he observed that the copper vessel was getting blackened from outside. It may be due to:

(a) proper combustion of fuel
(b) improper cooking of potato curry.
(c) improper combustion of the fuel.
(d) burning of copper vessel.

Answer 1

The answer is (c).
Due to improper combustion of the fuel, the copper vessel was getting blackened from outside.