(i) We pump kerosene and convert it into vapours. |
(ii) The vapours are then ignited. |
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.
Correct Answer: B
Solution :
Pumping kerosene and conversion to its vapours involve change in the state only (from liquid to vapours) and no new substance is formed. So, it is a physical change. During ignition of vapours, a lot of heat is given out and new substances are formed. Therefore, it is a chemical change.You need to login to perform this action.
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