Question

select the odd one and give reasons

1. Fe, Cu, Al, Zn, Mg
2. AgNO3, Cu(NO3)2, KNO3, Pb(NO3)2, Zn(NO3)2
3. C,CO,CO2,CO3
4. MnO4, PO4, SO4,CrO4
5. Neutron, Argon, Krypton, Helium

please answer fast , it's urgent​

Answer 1

Answer:

open b

Explanation:

answered of this question I hope you like it

Answer 2

AgNO3, Cu(NO3)2, KNO3, Pb(NO3)2, Zn(NO3)2

3. C,CO,CO2,CO3