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ICSE Class 10 Answered

1)write a equation when hot and concentrated sulphuric acid reacts with sodium hydroxide.

2)concentrated sulphuric  acid is kept in air tight bottle.give reason

3)sulphuric acid is not used as drying agent for H2S.

Asked by hrmeenal24 | 01 Nov, 2019, 05:51: PM
Expert Answer
1) When sulphuric acid reacts with sodium hydroxide it neutralizes base to form sodium sulphate.

     2NaOH + H2SO4 → Na2SO4 + 2H2O

2) Concentrated sulphuric acid is hygroscopic substance that absorbs moisture when exposed to air. Hence, it is stored in air tight bottles.

3) Sulphuric acid is not a drying agent for H2S because it reacts with H2S to form sulphur.

    H2SO4+H2S → 2H2O+SO2+S 

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