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Preparations and Uses of Sodium Carbonate

Anhydrous mag...

Question

Anhydrous magnesium chloride is obtained by heating the hydrated salt with dry ___.

A

HCl.

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B

NaCl

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C

both

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D

none

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Solution

The correct option is B HCl.
Anhydrous magnesium chloride is obtained by heating the hydrated salt with dry HCl.
Excess of HCl checks the hydrolysis of $M g C l_{2}$ by its own water of crystallization.

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Q. Assertion :Sodium chloride is added during electrolysis of fused anhydrous magnesium chloride. Reason: Anhydrous magnesium chloride is obtained by heating hydrated magnesium chloride,

M g C l_{2} .6 H_{2} O

.

Q. Hydrated magnesium chloride becomes anhydrous salt when it is heated:

M g C l_{2}

is obtained by heating the hydrated salt with dry HCl. If true enter 1, else enter 0.

Q. Pure anhydrous magnesium chloride can be prepared from hydrated salt by:

Q. (a) What is a salt? Give the names and formulae of any two salts. Also name the acids and bases from which these salt may be obtained.
(b) What is meant by 'a family of salts'? Explain with examples.
(c) What is meant by 'hydrated' and 'anhydrous' salts? Explain with examples.
(d) Write the names, formulae and colours of any two hydrated salts.
(e) What will be the colour of litmus in an aqueous solution of ammonium chloride salt?

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Preparations and Uses of Sodium Carbonate

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