Question

when a substance x has its melting point 200k and boiling point 270k at room temperature it will be a
a) solid
b) liquid
c) gas
d) none of these​

Answer 1

Answer:

gas because 270k is the room temperature

Answer 2

Answer:

The temperature at which a solid and liquid phase may coexist in equilibrium and at which matter transforms from solid to liquid form is known as a melting point.

The temperature at which a liquid boils and converts to vapor is known as the boiling point.

Explanation:

Room temperature = 293 K -298 K

If a substance's melting point is higher than room temperature and atmospheric pressure, it is referred to as a solid. 

If a substance has a melting point below room temperature and a boiling point above room temperature, it is referred to be a liquid. 

If a substance's boiling point is lower than room temperature under atmospheric pressure, it is referred to be a gas.

So, the substance x has its melting point of 200 K and boiling point of 270 K at room temperature. Thus, it has a lower melting point than room temperature and a lower boiling point than room temperature. So, the substance x should be a gas.

Hence the correct option is (b) gas.

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