Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test Chemistry Some Basic Concepts of Chemistry
Aqua - regia is a mixture of the following in the ratio 1 ∶ 3 by volume
1
conc. HNO3 and conc. HCI
2
conc. HNO3 and conc. H2SO4
3
dil. HCI and dil. HNO3
4
More than one of the above
5
None of the above