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Interconversion of State

True or false...

Question

True or false
The melting of chocolate, boiling of potato, and ripening of mango are all examples of physical changes

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Solution

The above statement is false as boiling of potato is a chemical change as potato has been cooked and ripening of mango is also a chemical change as ripening of a fruit occurs as a result of some chemical reaction within the fruit.

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Similar questions

Q. In which of the following examples the change in state of a substance is observed?
(i) Melting of chocolate
(ii) Boiling of water
(iii) Cutting of vegetables
(iv) Pouring of milk in tea

Q. State whether the following statements are true or false. Rewrite the false ones correctly.
(a) All irreversible changes are chemical changes.
(b) A liquid can sublime.
(c) The evaporation of water take place only at 100°C. when it is boiling.
(d) The melting of ice is a physical change.
(e) The souring of milk is a periodic change.
(f) The flowering of trees is a periodic change.
(g) Solidification and condensation are the same.
(h) The breaking of glass tumbler is a chemical change because it is irreversible.
(i) Boiling, evaporation and condensation are physical changes.

Q. Melting of wax and heating of blade are the examples of
(a) physical change
(b) chemical change
(c) periodic change
(d) irreversible change

Sort the following according to their physical and chemical changes.

(i) Combustion of wood

(ii) Melting of ice.

(iii) Cooking of food.

(iv) Rusting of iron.

(v) Ripening of fruits.

(vi) Tearing of papers.

Q. Fill in the blanks with the correct words.
1. Melting of ice-cream is an example of a/an .................... (reversible/irreversible) change.
2. Ripening of fruits is an example of a/an .................... (reversible/irreversible) change.
3. Cooking of foood is an example of a/an .................... (reversible/irreversible) change.
4. Breaking of glass is a .................... (physical/chemical) change.
5. .................... (Heating/Cooling) causes steam to change into water.

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