Deck 13: The Group 13 Elements

Question 1

Find the correct statement:

A) The stability of +1 oxidation state increases down Group 13.
B) The stability of +3 oxidation state increases down Group 13.
C) There is no clear trend in the stability of oxidation states in Group 13.

Answer 1

A

Question 2

Find the correct name for B₅H₉:

A) pentaborane-9-hydride
B) pentaboranenonahydride
C) pentaborane(9)

Answer 2

C

Question 3

Which of the following boron compounds is not planar?

A) BF₃
B) B₂F₄.
C) B₄Cl₄.

Answer 3

C

Question 4

Different borate structures are composed of these two simple structural building blocks:

A) three coordinate and five coordinate boron-oxygen species
B) three coordinate and four coordinate boron-oxygen species
C) four coordinate and five coordinate boron-oxygen species

Question 5

Find the correct statement:

A) B-N compounds are more reactive than analogue organic compounds.
B) B-N compounds are less polar than analogue organic compounds.
C) Cubic BN is harder than diamond.

Question 6

Suggest the structure for B₅H₉:

A) closo
B) nido
C) arachno

Question 7

Find the most hydridic hydride.

A) B₂H₆
B) AlH₃
C) GaH₃

Question 8

What do BCl₃ and AlCl₃ have in common?

A) Both are strong Lewis acids.
B) Both are ionic compounds.
C) Both dissolve little in water.

Question 9

Find the correct statement:

A) Al⁺ is a strong reducing agent while Tl³⁺ is a strong oxidizing agent.
B) Both Al³⁺ and Tl³⁺ are oxidizing.
C) Al₂O and Tl₂O are both very stable compounds.

Question 10

Why are compounds formed between elements of Group 13 and Group 15 important?

A) All of them are very hard materials.
B) They are semiconductors.
C) They are important raw materials.