Questions in Mechanical Properties of Fluids

Select	Question
	At which of the following temperatures, the value of surface tension of water is minimum
	If a glass rod is dipped in mercury and withdrawn out, the mercury does not wet the rod because
	Mercury does not wet glass, wood or iron because
	Surface tension of a liquid is found to be influenced by
	When a drop of water is dropped on oil surface, then
	Two pieces of glass plate one upon the other with a little water in between them cannot be separated easily because of
	Small liquid drops assume spherical shape because
	A thin metal disc of radius $r$ floats on water surface and bends the surface downwards along the perimeter making an angle $\theta$ with vertical edge of the disc. If the disc displaces a weight of water $W$ and surface tension of water is $T$, then the weight of metal disc is
	A $10$ cm long wire is placed horizontally on the surface of water and is gently pulled up with a force of $2 \times 10^{-2}$ N to keep the wire in equilibrium. The surface tension, in $Nm^{-1}$, of water is
	It is easy to wash clothes in hot water because its