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Calcium oxide (CaO) is used as dry- ing ...

Calcium oxide (CaO) is used as dry- ing agent in the preparation of Am- monia in laboratory. Can concen- trated `H_2SO_4` be used as drying agent instead of CaO? Justify your answer.

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No con `sulphuric acid` can not be used as drying agent here. Because ammonia is basic and it will react with sulphuric acid. To avoid this, CaO is used as drying agent.
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The glass Cl_(2) , SO_(2) and HCl are passed through H_(2)SO_(4) during their prepartion. a) Which property of H_(2)SO_(4) is revealed here? b) H_(2)SO_(4) is not as a drying agent in the manufacture of ammonia. Why?

Knowledge Check

  • Sulphuric acid is considered as the king of chemicals: The prosperity of any country is measured by the annount of sulphuric acid it consumnes. Sulpliuric acid is, thus, a substance of very great commercial importance as it is used practically in every important industry. This is due to the following properties of sulphuric acid: a) acidic nature b)oxidising nature c) dehydrating nature - d) sulphonation Concentrated H_2 SO_4 cannot be used to prepare HBr or HI from KBr or KI because it:

    A
    reacts too slowly with KBr or KI
    B
    reduces HBr or HI
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    D
    oxidises KBr to `KBrO_3` or KI to `KIO_3`

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