Coal and Petroleum
Quick practice
Question 1 of 5
Fill in the blank.
_________ is essential for combustion.
A
Carbon
B
Oxygen
C
None of these
D
Carbon dioxide
E
Carbon monoxide
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