The melting and boiling points of four
different substances are shown in the table.
The room temperature is 30°C.
Consider the following statements and
select the option which correctly identifies
true (T) and false (F) ones.
(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.
| (i) | (ii) | (iii) | (iv) | |
|---|---|---|---|---|
| A | T | T | T | F |
| B | F | T | T | F |
| C | F | F | F | T |
| D | T | F | T | F |
i cant understand