Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Equilibrium
Which one of the following acid is used by goldsmith for cleaning of gold and silver articles?
1
Sulphuric acid
2
Nitric acid
3
Hydrochloric acid
4
More than one of the above
5
None of the above