s-Block ElementsHard
Question
Which of the following statement(s) is/are correct ?
Options
A.Pure sodium oxide is obtained by heating the mixture of sodium azide and sodium 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 dissovle in ammonium sulphate solution.
Solution
(A) 3NaN3 + NaNO2 → 2Na2O + 5N2.
(B) False → Glauber′s salt (Na2SO4.10H2O) effloresces in dry air.
(C) 2 KO2 + S
K2SO4.
(D) Form soluble double sulphate, (NH4)2SO4.CaSO4.H2O (soluble complex).
(B) False → Glauber′s salt (Na2SO4.10H2O) effloresces in dry air.
(C) 2 KO2 + S
K2SO4.(D) Form soluble double sulphate, (NH4)2SO4.CaSO4.H2O (soluble complex).
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