Which of the following statements must be true for the entropy of a pure solid to be zero?
$I$ . The temperature must be zero kelvin.
$I I$ . The solid must be perfectly crystalline.
$I I I$ . The solid must be an element
$I V$ . The solid must be ionic.

I

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I

and

I I

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I, I I

and

I I I

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All are correct

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Solution

The correct option is B $I$ and $I I$
The entropy of a pure solid is zero only when there is no movement of particles, all the motions are completely seized and this is only possible if
1. the temperature must be zero kelvin
2. the solid must be perfectly crystalline.

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Which of the following statements must be true for the entropy of a pure solid to be zero?I. The temperature must be zero kelvin.II. The solid must be perfectly crystalline.III. The solid must be an elementIV. The solid must be ionic.

The correct option is B I and IIThe entropy of a pure solid is zero only when there is no movement of particles, all the motions are completely seized and this is only possible if1. the temperature must be zero kelvin2. the solid must be perfectly crystalline.

Which of the following statements must be true for the entropy of a pure solid to be zero?
$I$ . The temperature must be zero kelvin.
$I I$ . The solid must be perfectly crystalline.
$I I I$ . The solid must be an element
$I V$ . The solid must be ionic.

The correct option is B $I$ and $I I$
The entropy of a pure solid is zero only when there is no movement of particles, all the motions are completely seized and this is only possible if
1. the temperature must be zero kelvin
2. the solid must be perfectly crystalline.