Question

Ramesh 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

Answer 1

Answer:

corrosion

Explanation:

when copper comes in contact with humid air it undergoes corrosion which results in blackening of the vessel

Answer 2

Answer:

improper combustion of fuel

Explanation:

incomplete/improper combustion of fuel results in unburnt carbon particles/soot.therefore there is a black layer on the copper vessel from outside . hope this helps...let me know if it is wrong....