Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test General Science Chemistry Classification of Elements and Periodicity in Properties
What is the scientific name of laughing gas?
1
Hydrogen Peroxide
2
Carbon Monoxide
3
Nitrous Oxide
4
More than one of the above
5
None of the above