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Pascal's Law

In rock salt ...

Question

In rock salt structure, what percentage of the octahedral voids are occupied by cations?

A

50

%

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B

100

%

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C

25

%

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D

33

%

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Solution

The correct option is B $100$ %
In rock salt structure all the octahedral voids are occupied by cations (See structure of $N a C l$ ).

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Similar questions

Q. Assertion :In rock salt structure, all the octahedral voids in the close packing of anions are occupied by cations. Reason: In rock salt structure, the distance of closest approach between two anions is equal to half the face diagonal of the unit cell.

Assertion: In the rock salt type structure, all the octahedral voids are occupied by

N a^{+}

ions.
Reason: Number of octahedral voids

=

C l^{-}

ions in the packing.

Q. In a close-packed structure of mixed oxides, the lattice is composed of oxide ions, one-eighth of octahedral voids are occupied by divalent cations while one-half of octahedral voids are occupied by a trivalent cation. The formula of oxide is:

Q. In a closed packed structure of mixed oxides, the oxide ions are arranged in hcp array. One eight of tetrahedral voids are occupied by divalent cations (A) while one-half of octahedral voids are occupied by trivalent cations (B). What is the formula of the compound?

Q. In the structure of a compound, oxide ions are cubic close packed whereas

\frac{1}{8} t h

of tetrahedral voids are occupied by

A^{2 +}

cation and half of octahedral voids are occupied by

B^{3 +}

cations. The general formula of the compound having structure is:

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