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Chemistry | Class 10 | ICSE | Selina | Sulphuric Acid

Why is:

(a) Concentrated sulphuric acid kept in airtight bottles?

(b) H₂SO₄ is not a drying agent for H₂S?

(c) Sulphuric acid is used in the preparation of HCl and HNO₃? Give the equation in both cases.

Answers:

(a) Concentrated sulphuric acid is kept in an airtight bottle because of its hygroscopic nature.

(b) H₂SO₄ is not a drying agent for H₂S as it reacts and forms Sulphur.

Reaction Involved: H₂SO₄+ H₂S → H₂O + S₂O + S

(c) Sulphuric acid is used in the preparation of HCl and HNO₃ as it is a non-volatile substance

Reaction Involved: NaNO₃+ H₂SO₄ → NaHSO₄ + HNO₃

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