An ordinary electric fan does not cool the air, still it gives comfort in summer. Explain.

Why are electric transmission lines kept slightly loose, when they are laid in summer? Explain.

Statement- 1 : When an electric fan is switched on in a closed room, the air of the room is cooled. Statement- 2 : When fan is switched on, the speed of the air molecules will increase.

Even though an electric field vecE exerts a force qvecE on a charged particle yet the electric field of an EM wave does not contribute to the radiation pressure (but transfer energy). Explain.

Two different gases 'A' and 'B' are filled in separate containers of equal capacity under the same condition of temperature and pressure. On increasing the pressure slightly the gas 'A' liquefies but gas B does not liquify even on applying high pressure until it is cooled. Explain this phenomenon.

Vinyl chloride does not give S_(N) reaction but allyl chloride gives. Explain.

Wxplain the following giving suitable reson. Transitin metals of 3d-series doe not react readily with dilute acids to liberate hydrogen although they have high negative reduction potential values. Explain. .

Why does a piece of ice feel cool to touch? Explain.

If an electric fan be switched on in a closed room, will the air of the room be cooled? If not, why do we feel cold?

Why does the electric fan continue to rotate for some time after the current is switched off ?

Carbon tetrachloride does not conduct electricity . Give reason .