Question

Assertion :The two factors which decide whether a given substance would be in a solid, liquid or gaseous state are temperature and pressure. Reason: By changing the temperature and pressure of matter, its physical state can be altered.

• A. Assertion and reason both are correct statements and reason is correct explanation for assertion.
• B. Assertion and reason both are correct statements but reason is not correct explanation for assertion.
• C. Assertion is correct statement but reason is wrong statement.
• D. Assertion is wrong statement but reason is correct statement.

Answer 1

The correct option is A Assertion and reason both are correct statements and reason is correct explanation for assertion.

Both temperature and pressure can alter the physical state of solids, liquids and gases.

Solid $\underset{Higherpressure}{\overset{Lowertemperature}{\leftarrow }}$ Liquid $\underset{Highpressure}{\overset{Lowtemperature}{\leftarrow }}$ Gas

Solid $\underset{Lowpressure}{\overset{Hightemperature}{\to }}$ Liquid $\underset{Lowerpressure}{\overset{Highertemperature}{\to }}$ Gas