Question

Substance	Boiling point ${(}^{0}C)$	Melting point ${(}^{0}C)$
A	-183	-219
B	445	119
C	78	-15

Point out the physical states of A, B, and C at room temperature $\left({30}^{0}C\right)$.

• A. Gas, solid, liquid
• B. Gas, liquid, solid
• C. Liquid, solid, gas
• D. Solid, liquid, gas

Answer 1

Answer: (A)

Gas, solid, liquid

$\left(i\right)$ If Boiling point $>$ Room Temperature $>$ Melting Point

Then the physical state is liquid.

$\left(ii\right)$ If Room temperature $>$ Boiling point

Then the physical state is gas.

$\left(iii\right)$ If Room temperature $<$ Melting point

Then the physical state is solid.

Therefore,

for $A\Rightarrow$ Physical state is gas.

For $B\Rightarrow$ Physical state is solid.

For $C\Rightarrow$ Physical state is liquid.