Which of the following statement (s) is/...

Which of the following statement (s) is/are correct

A

Pure sodium oxide is obtained by heating the mixture of sodium azide and codium nitrite.

B

Glauber-s salt effloresces in moist air.

C

Potassium superoxide on heating in an evacuated and sealed tube yields sodium thiosulphate.

D

Gypsum dissolve in ammonium sulphate solution.

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The correct Answer is:

A, D

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