Question

The r+ / r– ratio of ZnS is 0.402. Pick out the false
statements of the following
(a) ZnS is 4 : 4 coordination compound.
(b) ZnS does not crystallize in rock salt type
lattice because r+ / r– is too small to avoid
overlapping of S²⁻ ions.
(c) Zn²⁺ ion is too small to fit precisely into the
octahedral voids of S²⁻ ions.
(d) Zn²⁺ ion is too large to fit into the octahedral
voids of S²⁻ ions.

Answer 1

Answer:

The r+ / r– ratio of ZnS is 0.402. Pick out the false

statements of the following

(a) ZnS is 4 : 4 coordination compound.

(b) ZnS does not crystallize in rock salt type

lattice because r+ / r– is too small to avoid

overlapping of S²⁻ ions.

(c) Zn²⁺ ion is too small to fit precisely into the

octahedral voids of S²⁻ ions.

(d) Zn²⁺ ion is too large to fit into the octahedral

voids of S²⁻ ions.

Answer 2

Answer:

AZnS is 4 : 4 coordination compound.

3%

BZnS does not crystallize in rock salt type lattice because r+/r− is too small to avoid overlapping of S2− ions.

28%

CZn2+ ion is too small to fit precisely into the octahedral voids of S2− ions.

34%

DZn2+ ion is too large to fit into the octahedral voids of S2− ions.

34%

Solution:

Zn2+ ion is too small to fit into the octahedral voids of S2− ions.

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