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Solution


Q.

Zn + HCl → Zn + _______
1 H2  
2 Cl2  
3 Zn  
4 None of these  

Ans.

(1)

Zn + HCl →ZnCl2+H2 
Displacement reaction is a chemical reaction in which a more reactive element displaces a less reactive element from its compound. Both metals and non-metals take part in displacement reactions.