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19.

Dimensions of surface tension are                        
A. MlL°T2 B. MlL°Tx
C. MlL r2 D. MlL2T2



20.

Falling drops of water become spheres due to the property of                        
A. adhesion B. cohesion
C. surface tension D. viscosity



21.

For manometer, a better liquid combination is one having                        
A. higher surface tension B. lower surface tension
C. surface tension is no criterion D. high density and viscosity




22.

For very great pressures, viscosity of moss gases and liquids                        
A. remains same B. increases
C. decreases D. shows erratic behaviour



23.

Free surface of a liquid behaves like a sheet and tends to contract to smallest possible area due to the                        
A. force of adhesion B. force of cohesion
C. force of friction D. force of diffusion



24.

Free surface of a liquid tends to contract to the smallest possible area due to force of                        
A. surface tension B. viscosity
C. friction D. cohesion



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