Q1 of 22 Page 33

Which of the following is a physical change?

Rusting of iron, combustion of magnesium ribbon and burning of candle are chemical changes while melting of wax is physical change because only its physical state is changing from solid to liquid.

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2

Which of the following is a chemical change?

 3

A chemical change may involve –

 4

Which of the following is/are true when milk changes into curd?

(i) Its state is changed from liquid to semi solid.


(ii) It changes colour.


(iii) It changes taste.


(iv) The change cannot be reversed.


Choose the correct option from below :

 5

A man painted his main gate made up of iron, to

(i) prevent it from rusting.


(ii) protect it from sun.


(iii) make it look beautiful.


(iv) make it dust free.


Which of the above statement(s) is/are correct?