Question

A student was given Mn,Zn,Fe andCu metals.Identify which of them

(a)willnotdisplaceH2fromdil.HCl.

(b)willreactonlywithsteamtogiveH2(g).

(c)willgiveH2with5%HNO3.

Writethechemicalreactionsinvolved.​

Answer 1

Answer:

Explanation:

Copper[Cu] will not displace H2 from dil.HCl. Iron[Fe] will react only with steam to give hydrogen gas. manganese metal react with HNO3 to give hydrogen gas.

Chemical reactions here involved are:-

1. HCl ± Cu→ no reaction
2. Fe ± HCl→ Fe4O3 ± H2
3. Mn ± HNO3→ Mn(NO3)2 ± H2