Question

which of the following is a chemical change
(a) Adding concentrated sulphuric acid to sugar.
(b) Distillation of water
(C) kneading of wheat flour
(d) Sublimation of ammonium chloride​

Answer 1

Answer:

a

Explanation:

concentrated sulphuric acid is dehydrating agent. its reaction with sugar is called charring of sugar.

   

Answer 2

Answer:

The correct option that represents a chemical change is: (a) Adding concentrated sulphuric acid to sugar.

Explanation:

From the above question,

They have given :

When focused sulphuric acid is brought to sugar, it reasons a chemical response known as dehydration, the place the sugar breaks down into carbon, water, and sulfur dioxide. This response is irreversible and produces new resources that are distinct from the authentic ones. Therefore, choice (a) is a chemical change.

Option (b), distillation of water, is a bodily exchange given that it includes the separation of water molecules from impurities via heating and cooling, however no new elements are formed.

Option (c), kneading of wheat flour, is additionally a bodily exchange given that it entails solely a trade in the bodily nation of the wheat flour and no new components are formed.

Option (d), sublimation of ammonium chloride, is a bodily trade the place strong ammonium chloride modifications into gaseous ammonium chloride besides forming any new substances.

Hence,

  The correct option that represents a chemical change is: (a) Adding concentrated sulphuric acid to sugar.

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