MolSynapsequestion bank

MolSynapse / Question bank / p-Block Elements: Groups 13 and 14 / Aluminium compounds and alums

JEE Main levelSingle correct optionDifficulty 2 of 3pb133

Heating hydrated aluminium chloride, $AlCl X_{3} \cdot 6 H X_{2} O$ , does not give anhydrous $AlCl X_{3}$ because

Ait explodes at low temperature
Bit hydrolyses on heating, losing HCl and forming $Al X_{2} O X_{3}$ / $Al (OH) X_{3}$
Cit is reduced to aluminium metal
Dit forms a stable dimer with water

Answer: B

The strongly hydrolysing

[Al (H X_{2} O) X_{6}] X^{3 +}

loses HCl on heating, leaving aluminium hydroxide/oxide. Anhydrous

AlCl X_{3}

is made from Al and dry

Cl X_{2}

or

HCl

.

Practice p-Block Elements: Groups 13 and 14 More on Aluminium compounds and alums

Previous questionNext question

More questions on Aluminium compounds and alums

Al2O3 is NEET level
Alum is used for purification of water because it NEET level
The principal ore of aluminium is NEET level
An aqueous solution of AlCl3 is acidic because JEE Main level
Which of the following is an alum? JEE Main level
In the Hall-Heroult process, cryolite Na3AlF6 is added to JEE Main level