We spread the clothes while drying. Give reason.

Calcium oxide and phosphorus pentoxide are good drying agents but they are not employed to dry hydrogen chloride gas. Give reasons for each.

In the preparation of iron (III) chloride by the action of dry chlorine on hot iron, heating is discontinued once the reaction starts. Give reason.

A well watered potted herbaceous plant shows wilting in the afternoon of a dry sunny day. Give reason.

While separating a mixture of ortho- and para-nitrophenols steam distillation, name the isomer which will be steam volatile. Give reason.

Water near the bed of a deep river is quiet while that near the surface flows. Give reasons.

We do not feel uneasy even under enormous pressure of the atmosphere above as well as around us. Give a reason.

We should plant more trees. Do you agree? Give reason.

In which medium the speed of sound is more : humid air or dry air ? Give a reason to your answer.

Differentiate the function of concentrated sulphuric acid as a drying agent & as a dehydrating agent. Is fused calcium chloride a dehydrating or a desiccating agent. Give reasons.