Question

Which of the following is not true about potash alum?
(a) Its empirical formula is KAl(SO₄)₂. 12H₂O.
(b) Its aqueous solution is basic
(c) It is used in dyeing industries
(d) All are correct.

Answer 1

the option " A" is correct.

Answer 2

Answer:

Explanation:

Potassium alum, or potash alum, or potassium aluminum sulfate is a chemical compound, also the potassium double sulfate of aluminium. The chemical formula for the same is KAl(SO₄)₂ and is commonly found in its dodecahydrate form as KAl(SO₄)₂·12H₂O.

Potassium alum is commonly used in water purification, leather tanning, dyeing and also fireproof textiles.

Formula: KAl(SO4)2

Molar mass: 474.3884 g/mol

Melting point: 92.5 °C

Solubility in the water: 14.00 g/100 mL (20 °C); 36.80 g/100 mL (50 °C).

Thus, all the given options are correct.