BANK EPFO Stenographer (Group C) Mock Test 2023 General Science Chemistry Chemistry in Everyday Life
Ram 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:
1
proper combustion of fuel.
2
improper cooking of potato curry.
3
improper combustion of the fuel.
4
burning of copper vessel.