Single Choice

Which of the following is not true about potash alum?

AIt's empirical formula is $$KAl(SO_4)_2.12H_2O$$
BIt's aqueous solution is basic
CIt is used in dyeing industries
DOn heating it melts in its water of crystallisation
Correct Answer

Solution

Potash alum on heating it dries up and do not melt on its water of crystallization.
And remaining options all are correct.
Hence option D is correct.

SIMILAR QUESTIONS

s - block Elements (Alkali and Alkaline Earth Metals)

An example of Alum is___________.

s - block Elements (Alkali and Alkaline Earth Metals)

Which of the following is a use of alum

s - block Elements (Alkali and Alkaline Earth Metals)

Alum helps in purifying water by_________

s - block Elements (Alkali and Alkaline Earth Metals)

Alum is water purifier because it___________

s - block Elements (Alkali and Alkaline Earth Metals)

Why does bleeding stop by rubbing moist alum?

s - block Elements (Alkali and Alkaline Earth Metals)

When a solution of sodium hydroxide is added in excess to the solution of potash alum, we obtain:

s - block Elements (Alkali and Alkaline Earth Metals)

When a solution of sodium hydroxided in excess to the solution of postah alum, we get :

s - block Elements (Alkali and Alkaline Earth Metals)

Alums are used for_________

s - block Elements (Alkali and Alkaline Earth Metals)

Answer the following Name the two metals present in common alum.

s - block Elements (Alkali and Alkaline Earth Metals)

Answer the following Name the compound of aluminium which is used as germicide and coagulant in the purification of water.

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