Coal and Petroleum
Quick practice
Question 1 of 5
Fill in the blank.
_________ is essential for combustion.
A
Oxygen
B
Carbon
C
Carbon monoxide
D
Carbon dioxide
E
None of these
Get unlimited practice with CBSE Class 8 subscription
Boost your performance with adaptive practice tests
Practice every concept in the syllabus
Compare your speed and accuracy with your peers
Download the app and practice on the go