Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Periodic Table
Which of the following is commonly known as the Laughing Gas?
1
Nitrogen Oxide
2
Dinitrogen Tetroxide
3
Nitrous Oxide
4
More than one of the above
5
None of the above