Question

1. why are the following changes considered as chemical change: ( i ) burning of LPG gas. (ii) Rusting of iron.( iii) Baking of biscuit or cake​

Answer 1

Answer:

The changes which takes place permanently is known as chemical changes

Explanation:

i)at first LPG the name itself signifies that it liquified gas when released out in the air it changes into gaseous form..

ii)When water reacts with oxygen on the surface of iron rusting of iron takes place

iii)before baking the cake it was just in the form of flour and then when it is baked it tranforms permanently to biscuit or cake ...

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