Changes around ...

Pick the change that can be reversed from the following.

Which of the following changes cannot be reversed?

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

While lighting a candle, Paheli observed the following changes:

1. Wax was melting.
2. Candle was burning.
3. Size of the candle was reducing.
4. Melted wax was getting solidified. Of the above, the changes that can be reversed are

Salt can be separated from its solution (salt dissolved in water), because

Rolling of chapati and baking of chapati are the changes that

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