Question

Which of the following factors are responsible for the change in state of solid carbon dioxide when kept exposed to air ?
(i) increase in pressure
(ii) increase in temperature
(iii) decrease in pressure
(iv) decrease in temperature
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (ii) and (iv)

Answer 1

Answer:

Which of the following factors are responsible for the change in state of solid carbon dioxide when kept exposed to air ?

(i) increase in pressure

(ii) increase in temperature

(iii) decrease in pressure

(iv) decrease in temperature

(a) (i) and (ii)

(b) (i) and (iii)

(c) (ii) and (iii)

(d) (ii) and (iv)

Answer 2

Increase in temperature and decrease in pressure are responsible for the change in state of solid carbon dioxide when kept exposed to air.

Explanation:

When solid carbon dioxide is kept exposed to air then as it is present in an open system so there will very less pressure on it. So, it will change into gaseous state.

For this gas, to be behave ideally is only possible when it remains at low pressure and high temperature. As these conditions will only lead to change in state of the solid carbon dioxide.

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