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Subject :NSO    Class : Class 7

In a pressure-kerosene stove,
(i) We pump kerosene and convert it into vapours.
(ii) The vapours are then ignited.
Which of the following is true about the above statements?

A (i) is a chemical change; (ii) is a physical change.
B (i) is a physical change; (ii) is a chemical change.
C Both (i) and (ii) are physical changes.
D Both (i) and (ii) are chemical changes.


Ans 1:

Class : Class 7

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