Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Periodic Table
Which of the following chemical explosive found in Gunpowder?
1
Calcium sulfate
2
Potassium nitrate
3
Lead sulphide
4
More than one of the above
5
None of the above