As the temperature of a fluid decreases— A The number of inter-particle collisions decrease and random movement of particles increase. B The number of inter-particle collisions and random movement of particles decrease. C The number of inter-particle collisions and random movement of particles increase. D The number of inter-particle collisions increase and random movement of particles decrease.

Option B The number of inter-particle collisions and random movement of particles decrease.

Explanation:

According to the kinetic theory of gas,

The average kinetic energy of gas molecules are directly proportional to the temperature. This means that an increase in temperature will give the gas molecules more energy to move randomly and a decrease in the temperatures will also decrease the energy of the molecules hence decreasing their random movement. Also, as the temperature increases, and the gas molecules moves more randomly, they collide more with each other and as the temperature decrease, and their random movement also decrease, the collision of the gas molecules also decrease.

Now from the question given above,

As the temperature of a fluid decreases, the number of inter-particle collisions and random movement of particles decrease.

So, option B is the correct option.