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The melting and boiling points of four d...

The melting and boiling points of four different substances are shown in the table. The room temperature is `30^(@)`C.

Which of the following statements are incorrect about the data given in the table?
(i) Substance P is in solid state at room temperature.
(ii) Substance Q is in liquid state at room temperature.
(iii) Substance R is gas at `-150^(@)`C and solid at `-220^(@)`C.
(iv) Substance S is in solid state at room temperature.

A

(i) and (ii) only

B

(i), (ii) and (iii) only

C

(iii) and (iv) only

D

(i), (ii), (iii) and (iv)

Text Solution

Verified by Experts

The correct Answer is:
B
According to the melting and boiling points given in the table, substance P is in liquid state at room temperature, substance Q is in gaseous state at room temperature, substance R is in liquid state at room temperature and solid at temperatures below `-40^(@)`C and substance S is in solid state at room temperature.
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