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Question

Question: Reaction between following pairs will produce hydrogen except :...

Reaction between following pairs will produce hydrogen except :

A

Cu + HCl

B

Fe + H2O (g)

C

Mg + H2O (hot)

D

Na + Alcohol

Answer

Cu + HCl

Explanation

Solution

(1) Cu  +  HCl   \longrightarrow  No reaction

(2) 3Fe +  4H2O (g) \longrightarrow  Fe3O4  +  4H2 \uparrow

(3) Mg  +  2H2O (hot) \longrightarrow  Mg(OH)2 + H2

(4) Na + C2H5OH \longrightarrow C2H5ONa + H