Sketch the structure of Orthoboric acid.

Important Questions on The p -Block Elements - Group 13

MEDIUM

11th Telangana Board

IMPORTANT

Intermediate First Year Chemistry>Chapter 10 - The p -Block Elements - Group 13>QUESTIONS>Q 18

Write the structure of ${\mathrm{AlCl}}_3$ as a dimer.

EASY

11th Telangana Board

IMPORTANT

Intermediate First Year Chemistry>Chapter 10 - The p -Block Elements - Group 13>QUESTIONS>Q 19

Metal borides (having ${}^{10}\mathrm{B}$) are used as protective shield-why?

MEDIUM

11th Telangana Board

IMPORTANT

Intermediate First Year Chemistry>Chapter 10 - The p -Block Elements - Group 13>QUESTIONS>Q 20

Write reactions to justify the amphoteric nature of aluminium.

EASY

11th Telangana Board

IMPORTANT

Intermediate First Year Chemistry>Chapter 10 - The p -Block Elements - Group 13>QUESTIONS>Q 21

What are electron deficient compounds ? Is ${\mathrm{BCl}}_3$ an electron deficient species ? Explain.

MEDIUM

11th Telangana Board

IMPORTANT

Intermediate First Year Chemistry>Chapter 10 - The p -Block Elements - Group 13>QUESTIONS>Q 22

Suggest the reasons why the $\mathrm{B}-\mathrm{F}$ bond lengths in ${\mathrm{BF}}_3 (130 \mathrm{pm})$ and ${\mathrm{BF}}_4^{-} (143 \mathrm{pm})$ differ.

MEDIUM

11th Telangana Board

IMPORTANT

Intermediate First Year Chemistry>Chapter 10 - The p -Block Elements - Group 13>QUESTIONS>Q 23

If $\mathrm{B}–\mathrm{Cl}$ bond has a dipole moment, explain why ${\mathrm{BCl}}_3$ molecule has zero dipole moment.

MEDIUM

11th Telangana Board

IMPORTANT

Intermediate First Year Chemistry>Chapter 10 - The p -Block Elements - Group 13>QUESTIONS>Q 24

Explain the structure of boric acid.

MEDIUM

11th Telangana Board

IMPORTANT

Intermediate First Year Chemistry>Chapter 10 - The p -Block Elements - Group 13>QUESTIONS>Q 25

What happens when borax is heated strongly?