Question

can someone answer the tick marked questions?​

Answer 1

When Zinc is reacted with sulphuric acid the following reaction takes place:

Zn + H2SO4 → ZnSO4 + H2

Bubbles are seen on the surface of Zinc granules.

The gas evolved when passed through soap solution forms bubbles in the soap solution which are filled with the Hydrogen gas.

When a burning candle is brought near the gas filled bubble, a pop sound is heard.

When HCl, HNO3, CH3COOH is used the same gas is evolved and observations are same. The chemical reactions taking place are as follows:

Zn + 2HCl → ZnCl2+ H2

Zn + 2HNO3 → Zn(NO3)2 + H2

Zn + CH3COOH → Zn(CH3COO)2 + H2

Answer 2

When Zinc is reacted with sulphuric acid the following reaction takes place:

Zn + H2SO4 → ZnSO4 + H2

Bubbles are seen on the surface of Zinc granules.

The gas evolved when passed through soap solution forms bubbles in the soap solution which are filled with the Hydrogen gas.

When a burning candle is brought near the gas filled bubble, a pop sound is heard.

When HCl, HNO3, CH3COOH is used the same gas is evolved and observations are same. The chemical reactions taking place are as follows:

Zn + 2HCl → ZnCl2+ H2

Zn + 2HNO3 → Zn(NO3)2 + H2

Zn + CH3COOH → Zn(CH3COO)2 + H2

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