Question

Which of the following do not represent that a chemical change is taking place? ( I). A gas is produced (II). Precipitate is formed. (III). State of a substance changes (IV). A new odour is produced. (V). Shape of a substance changes

I and V only

I and IV only

II, III and V only

III and V only

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Answer 1

Answer:

3rd and 5th only

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Answer 2

Answer:

IT'S CORRECT ANSWER IS III and V only.

Explanation:

It's so because except III and V all are the various probabilty of outcome in a reaction.When a reaction takes place, gas is formed, percipitate is formed, a new odour is formed, heat is evolved or required, favorable atmosphere is required, pressure is required and many more are there which show that the reaction is chemical reaction and if the condition not available then the reaction will not take place. Every reaction requires some conditions.

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