Write note on orthoboric acid.

Important Questions on Group-13 Elements

MEDIUM

11th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-1>Chapter 14 - Group-13 Elements>QUESTIONS>Q 12

What happens when borax is heated?

MEDIUM

11th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-1>Chapter 14 - Group-13 Elements>QUESTIONS>Q 13

Give reactions to show that aluminium is an amphoteric element.

MEDIUM

11th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-1>Chapter 14 - Group-13 Elements>QUESTIONS>Q 14

Why boron trifluoride is called electron deficient compound? Explain.

MEDIUM

11th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-1>Chapter 14 - Group-13 Elements>QUESTIONS>Q 1

Why boron halides do not exist as dimers while ${\mathrm{AlCl}}_3$ exists as ${\mathrm{Al}}_2{\mathrm{Cl}}_6$?

MEDIUM

11th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-1>Chapter 14 - Group-13 Elements>QUESTIONS>Q 2

${\mathrm{BCl}}_3$ is trigonal planar while ${\mathrm{AlCl}}_3$ is tetrahedral in dimeric state. Explain.

MEDIUM

11th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-1>Chapter 14 - Group-13 Elements>QUESTIONS>Q 3

Why ${\mathrm{BBr}}_3$ is a stronger Lewis acid as compared to ${\mathrm{BF}}_3$ though fluorine is more electronegative than bromine?

HARD

11th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-1>Chapter 14 - Group-13 Elements>QUESTIONS>Q 1

Write general trends in the properties of group $\mathrm{IIIA}$ elements (Boron family). How borax is prepared? Mention one of its uses.

MEDIUM

11th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-1>Chapter 14 - Group-13 Elements>QUESTIONS>Q 2

Write note on aluminothermic process.