Deck 17: The Group 17 Elements

Question 1

Which halogen is not prepared using electrochemical oxidation of its halide?

A) Fluorine
B) Chlorine
C) Iodine

Answer 1

C

Question 2

Hydrides of the Group 17 elements are:

A) All acidic
B) All liquids
C) All thermodynamically stable

Answer 2

A

Question 3

Find a correct statement:

A) All Group 17 elements are either gases or liquids at standard conditions.
B) Contrary to expected trends F-F bond is weaker than Cl-Cl bond.
C) The oxidizing power of halogens increases down the group.

Answer 3

B

Question 4

Which general formula does not represent a neutral interhalogen?

A) XY
B) XY₂
C) XY₃

Question 5

Which cations can stabilize polyhalides?

A) Small, Lewis acidic cations
B) Large cations with a low charge
C) The stability of polyhalides is independent of cations.

Question 6

Which halogen forms the most stable oxides?

A) Fluorine.
B) Bromine
C) Iodine.

Question 7

Find correct statement(s):
(i) All chlorine oxoanions are oxidizing agents.
(ii) IO₄^- reacts slower than either BrO₄^- or ClO₄^-
(iii) All bromine oxoacids are very strong acids.

A) (i) only
B) (ii) and (iii)
C) (iii) only

Question 8

In basic aqueous solutions Br₂ easily disproportionates into:

A) BrO₂ and Br^-
B) BrO^- and Br^-
C) BrO^- and Br₃^-

Question 9

Consider the synthesis of various fluorocarbons. When would HF be reagent of choice?

A) For synthesis of any fluorocarbon
B) For synthesis of chlorofluorocarbons
C) HF is not used for synthesis of C-F compounds because it is too corosive.