To walk through a waterlogged area, you usually shorten the length of your dress by folding it. Can this change be reversed?

A bag of cement lying in the open gets wet due to rain during the night. The next day the sun shines brightly. Do you think the changes which have occurred in the cement, could be reversed.

Some changes are listed in the following table. For each change, write in the blank column whether the change can be reversed or not.

A thick coating of a paste of Plaster of Paris (POP) is applied over the bandage on a fractured bone. It becomes hard on drying to keep the fractured bone immobilized. Can the change in POP be reversed?

A drawing sheet changes when you draw a picture on it. Can you reverse this change?

Iron rim is made slightly smaller than the wooden wheel. The rim is usually heated before fixing into the wooden wheel, because on heating the iron rim

Rolling of chapatti and baking of chapatti are the changes that

While lighting a candle, Paheli observed the following changes

(i) Wax was melting.

(ii) Candle was burning.

(iii) Size of the candle was reducing.

(iv) Melted wax was getting solidified.

Of the above, the changes that can be reversed are

Pick the change that can be reversed from the following

An iron ring is heated. Which of the following statement about it is incorrect?

Paheli had bought a new bottle of from the market. She tried to open the metal cap to taste it but could not do so. She then took a bowl a bowl of hot water and immersed the upper end of the bottle in it for five minutes. She could easily open the bottle now. Can you give the reason for this?