Concise Inorganic Chemistry>Chapter 11 - The Group 13 Elements>Exercise 1>Q 18

MEDIUM

JEE Advanced

IMPORTANT

Earn 100

How is aluminium chloride prepared ? What is its structure when anhydrous and when dissolved in water? Give an example of the use of ${AlCl}_{3}$ as a Friedel-Crafts catalyst.

Important Questions on The Group 13 Elements

MEDIUM

JEE Advanced

IMPORTANT

Concise Inorganic Chemistry>Chapter 11 - The Group 13 Elements>Exercise 1>Q 19

How would you prepare

LiH

and

{LiAlH}_{4}

? What are they used for?

HARD

JEE Advanced

IMPORTANT

Concise Inorganic Chemistry>Chapter 11 - The Group 13 Elements>Exercise 1>Q 20

Give two different preparations for

{Et}_{3} Al

and describe its use as a catalyst for polymerizing

C_{2} H_{4} .

HARD

JEE Advanced

IMPORTANT

Concise Inorganic Chemistry>Chapter 11 - The Group 13 Elements>Exercise 1>Q 21

Compare and contrast the chemistry of boron and aluminium.

MEDIUM

JEE Advanced

IMPORTANT

Concise Inorganic Chemistry>Chapter 11 - The Group 13 Elements>Exercise 1>Q 22

Give reasons for trivalency and monovalency in group

13

elements and comment on the validity of divalent compounds such as

{GaCl}_{2}

.

MEDIUM

JEE Advanced

IMPORTANT

Concise Inorganic Chemistry>Chapter 11 - The Group 13 Elements>Exercise 1>Q 23

Write notes on the chemistry of thallium in the

+ 1

oxidation state.

HARD

JEE Advanced

IMPORTANT

Concise Inorganic Chemistry>Chapter 11 - The Group 13 Elements>Exercise 1>Q 24

Substance

(A)

is a yellowish-white deliquescent solid, which sublimes and has a vapour density of

133 .

(A)

reacts violently with water, to form solution

(B)

. A sample of

(B)

gave a curdy white precipitate

(C)

on the addition of dilute

{HNO}_{3}

and

{AgNO}_{3}

solution. However, the precipitate readily dissolved on the addition of dilute

{NH}_{4} OH

, though a gelatinous white precipitate was formed in its place.

(D)

was filtered off and dissolved in excess

NaOH

, forming a clear solution

(E)

. When

{CO}_{2}

was passed into

(E),

compound

(D)

was reprecipitated. Substance

(A)

dissolved unchanged in dry ether and on reaction with

LiH

, one of the two products

(F)

or

(G)

, was formed, depending on whether the

LiH

was present in excess or not. Qualitative analysis of the solution

(B)

gave a white gelatinous precipitate in Group

III

. When

0.1333 g

of

(A)

was dissolved in water and treated with

8

-hydroxyquinoline,

0.4594 g

of precipitate was obtained. Identify the compounds

(A)

to

(G)

and give equations for all of the reactions.