s-Block ElementsHard
Question
Which of the following statement(s) is/are correct ?
Options
A.Sodium bicarbonate is more soluble than sodium carbonate.
B.Sodium hydroxide is used in the purification of bauxite.
C.Sodium bicarbonate is used as antacid and for making baking powder.
D.Potassium hydroxide is used in the manufacture of soft soaps.
Solution
(A) Sodium bicarbonate is sparingly soluble while sodium carbonate is fairly soluble in water.
(B) Al2O3 + 2NaOH → 2NaAlO2 (soluble) + H2O. (Bayer′s process).
(C) NaHCO3 + H2O ⇋ NaOH + H2CO3 - reduces acidity.
2NaHCO3
Na2CO3 + H2O + CO2 - CO2 liberated produces porosity and thus makes bread soft.
(D) One of the uses of potassium hydroxide is in making the soft soaps
(B) Al2O3 + 2NaOH → 2NaAlO2 (soluble) + H2O. (Bayer′s process).
(C) NaHCO3 + H2O ⇋ NaOH + H2CO3 - reduces acidity.
2NaHCO3
Na2CO3 + H2O + CO2 - CO2 liberated produces porosity and thus makes bread soft.(D) One of the uses of potassium hydroxide is in making the soft soaps
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