Oxidation number of P in pyrophosphoric acid is:
1. +5
2. +2
3. +3
4. +4
A compound having two direct bonds between P and H atoms is:
1.
2.
3.
4.
Nitrogen form , but phosphorous form , it's at a time convert in , reason is:
1. Triple bond present between phosphorous atoms.
2. bonding is weak in phosphorous.
3. bonding is strong in phosphorous.
4. Multiple bonds easily form phosphorous.