Quiz-1

What is the value of internal energy of an ideal gas at absolute zero?

• 1.5

• 2

• 0

• 1.2

Gas pressure is caused by

• gas molecules colliding with surfaces
• gas molecules condensing to a liquid
• gas molecules hitting other gas molecule
• barometers

Find  the correct  option

• Gas particles are elastic and do not attract each other.

• The kinetic energy of gas is dependent on temperature 

• Energy is not lost when gas particles collide with each other or with the walls of the container.

• All of the above

The volume of 1 mole of an ideal gas at absolute zero is-

• 22.4 lit

• 22400 cc

• 0

• 1 lit

Which is the effect of increase in the temperature on the surface tension of the liquid?

• it decreases

• it increases

• it remains the same

• None of the above

A soap film is trapped between a frame and a wire of length 10 cm as shown.If the surface tension is given as 0.0049 N/m, what will be the value of m (in mg) such that the wire remains in equilibrium?

• 0.1

• 1

• 10

• 100

What is the shape of meniscus when angle of contact is greater than 90°?

• Concave

• Convex

• Plane

• None of the above

What is the main cause of capillarity?

• difference in weight of fluids

• pressure difference

• temperature difference

• velocity gradient