Question

Which metal gives hydrogen on reacting with water, acid and alkali?
A. Iron
B. Zinc
C. Magnesium
D. Lead​

Answer 1

Answer:

B)ZINC

ZINC metal gives hydrogen gas on reacting with both dilute acid and alkali.

Zn + 2HCl ---> ZnCl2 + H2

Zn + 2NaOH ---> Na2ZnO2 + H2

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Explanation:

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Answer 2

B. Zinc

but water should be in the form of vapour.