Which of the following is not true about potash alum?

It's empirical formula is

K A l (S O_{4})_{2} .12 H_{2} O

No worries! We‘ve got your back. Try BYJU‘S free classes today!

It's aqueous solution is basic

No worries! We‘ve got your back. Try BYJU‘S free classes today!

It is used in dyeing industries

No worries! We‘ve got your back. Try BYJU‘S free classes today!

On heating it melts in its water of crystallisation

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D On heating it melts in its water of crystallisation
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.

Suggest Corrections

Similar questions

Q. An unknown inorganic compound

(X)

loses its water of crystallisation. On heating its aqueous solution gives the following reacion:
(i) it gives a white turbidity with dilute

H C l

solution.
(ii) it decolourises a solution of iodine in

K I

.
(iii) it gives a white precipitate with

A g N O_{3}

solution which turns black on standing.
Identify compound

(X)

Q. 5g of a crystalline salt lost 1.8g of water on heating, it's formula weight (anhydrous salt) is 160. The water of crystallisation of the salt is.

On heating with concetrated NaOH solution in an inert atmosphere of $C O_{2}$ , white phospherous gives a gas. Which of the following statement is incorrect about the gas?

Q. 5g of a crystalline salt lost 1.8g of water on heating, it's formula weight (anhydrous salt) is 160. The water of crystallisation of the salt is.

Q. An aqueous solution involving charge species is used to melt ice on a frozen walkway.
The most effective melting at temperatures below the freezing point of water will be produced by an aqueous solution of which of the following?

Join BYJU'S Learning Program

Which of the following is not true about potash alum?

The correct option is D On heating it melts in its water of crystallisationPotash 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.

The correct option is D On heating it melts in its water of crystallisation
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.