In the formation of a star a large volume of gas and dust pa

In the formation of a star a large volume of gas and dust particles contracts due to gravitational pull. Which of the following is/are true of this contracting mass of gas?

(i) the pressure and temperature inside the mass increase.

(ii) the temperature inside the mass increases, but pressure decreases.

(iii) the gas particles slow down as a result of the decrease in volume

(iv) the gas particles speed up and they hit against each other more violently

Solution

a)

d)