Question

1 Which of the following is a physical change?
(a) Formation of curd from milk
(b) Ripening of fruits
(c) Getting salt from sea water
(d) Burning of wood


Answer is ..

(c) Getting salt from sea water ​

Answer 1

Answer:

getting salt from the sea

Explanation:

it only involves evaporation which is just a change of state and not a change in the molecular structure so it is a physical change

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Answer 2

(c) Getting salt from seawater is a Physical change

Explanation:

• Physical change is commonly known as a change in physical Properties without affecting their chemical composition.

• It is a reversible process.

• The size, shape, volume of matter can be changed but not change chemical reactions.

• In the formation of curd, rennet enzyme is added into milk. Their chemical reaction occurs there, so it is not a Physical change

• The burning of wood is a chemical change.

• In the Ripening of fruits, their chemical composition is changed.

• Salt from seawater is only changed from a liquid state into a solid state.