Question

I need help with this problems to know if they have reaction or no reaction.

1) Cr(s) +Co(NO3)2 (aq).
2) Ni(s) + Li2CO3(aq)
3) Co(s) + HCl(aq)
4) Cd(s) + H2SO4(aq)?

Answer 1

i thank its 4)

Step-by-step explanation:

becuse if they have reactino or no reatino will it 4) becuse i did this