Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test General Science Chemistry States of Matter
Which is correct statement ?
1
Oxygen is always a molecule.
2
Air is always a mixture.
3
Any gas is always a compound
4
More than one of the above
5
None of the above