Hydrogen is not obtained when zinc reacts wit | vedclass

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Question

(C) Zinc does not react with cold water to produce hydrogen gas. Zinc reacts with hot $NaOH$ solution to produce sodium zincate and hydrogen gas: $Zn

Vedclass · Accepted Answer

Conc. sulphuric acid

Vedclass · Answer

(C) Zinc does not react with cold water to produce hydrogen gas. Zinc reacts with hot $NaOH$ solution to produce sodium zincate and hydrogen gas: $Zn + 2NaOH 	o Na_2ZnO_2 + H_2$. Zinc reacts with dilute $HCl$ to produce zinc chloride and hydrogen gas: $Zn + 2HCl 	o ZnCl_2 + H_2$. Zinc reacts with concentrated sulphuric acid to produce zinc sulphate,sulphur dioxide,and water,not hydrogen gas: $Zn + 2H_2SO_4 	o ZnSO_4 + SO_2 + 2H_2O$. Therefore,hydrogen is not obtained when zinc reacts with concentrated sulphuric acid.

Hydrogen is not obtained when zinc reacts with

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