Question

What happens when zinc granules are
treated with dilute solution of H2SO4, HCI,
HNO3, NaCl and NaOH. Also write their
chemical equations, if reaction occurs.

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Answer 1

Answer:

Hydrogen gas and zinc sulphate are formed when zinc granules are treated with sulphuric acid.

Zn + H2SO4 ⇨ ZnSO4 + H2

Zinc chloride and hydrogen gas are formed, when zinc granules are treated with hydrochloric acid.

Zn + 2HCl ⇨ ZnCl2 + H2

Similarly, hydrogen gas and zinc nitrate are formed when zinc granules are treated with nitric acid.

Zn + 2HNO3 ⇨ Zn(NO3 )2 + H2

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Answer 2

Answer:

WHEN ZINC GRANULES REACT WITH dil. HCL :-

Acid (like HCL) liberate hydrogen (H2 ) gas on reacting with active metals like zinc (Zn) which burn with a pop sound when burning splinter brought near to it.

REACTION :- 2HCL(aq) +Zn( s) —→ ZnCl2(aq) +H2

WHEN zinc granules react with dil. NaOH :-

Bases (like NaOH ) liberates H2 gas on reacting with active metals like Zn and which burns with pop sound when burning splinter brought near to it.

REACTION :- 2NaOH (aq ) + Zn(s) —→ Na2ZnO2(s) + H2 ↑