SOM 1

The magnitude of the force that controls the shape of the liquid is called the ____________.

• . Force of condensation    

•   b. Force of attraction    

•   c. Surface tension        

• d. all of the above

Poisuulle’s equation

Answer explanation

v= πΔpr4t/8ηl

Trouton’s Rule

Answer explanation

ΔH/T

Gibbs – Duhem – Margules equation.

Answer explanation

dlnpA/dlmxA=dlnpB/dln xB

boyle's law

Answer explanation

P inversely proportional to v

Cleansing action of soap and detergents is due to their property of

• a. viscosity 

• dissolving polar substances

• increasing the viscocity of water

• lowering the interfacial tension between water and greasy substances

The viscosity of a liquid generally decreases with

• decrease in temperature

• rise in temperature

• rise in pressure

• rise in volume

What enables an iron needle to float on the

surface of water ?

• a) Its light weight

• b) Upward thrust of water

• c) Surface tension of water

• d) Polish on its surface

The unit in which surface tension is measured is

• a) dyne cm             

• b) dyne cm-1          

• c) dyne-1 cm           

• d) dyne-1 cm-1

Drops of a liquid are spherical because of

• . collisions of molecules

• b. viscosity

• surface tension

• vapour pressure