Why was group 18 named as noble gases?
Octet electron configuration
Minute quantity in atmosphere
Chemical inactivity
Preparation of xenon and krypton compounds
The most abundant element of group 15 is
Nitrogen
Antimony
Phosphorous
None of these
Among the halogen acid, the weakest acid is
HF
HCl
HBr
HI
Which chemical equation denotes the Plumbo solvency phenomenon?
3Pb + 2O2 → Pb3O4
2Pb + O2 + 2H2O → 2Pb(OH)2
2Pb + O2 → 2PbO