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Byju's Answer
Standard IX
Chemistry
Preparation of Hydrogen from Cold Water and Metals
H 2 gas is no...
Question

H2 gas is not obtained when zinc reacts with conc. H2SO4 and .

A
cold water
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B
hot NaOH solution
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C
methanol
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D
dil. HCl
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Solution

The correct option is A cold water
Zinc does not react with cold water to produce hydrogen and it produces hydrogen by reacting with steam.

When zinc reacts with conc. H2SO4, then:

Zn+conc.H2SO4→ZnSO4+SO2

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