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Ferrous oxide...

Question

Ferrous oxide has a cubic structure and each edge of the unit cell is 5.0 Å.

Assuming density of the oxide as , then the number of

ions present in each unit cell will be

[MP PET 2000]

A

Four

and four

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B

Two

and four

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C

Four and two

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D

Three and three

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Solution

The correct option is A Four and four
Let the units of ferrous oxide in a unit cell = n, molecular weight of ferrous oxide

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