When Eno fruit salt is mixed with water, bubbles are formed. What type of change is it? Explain [5 MARKS]

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Solution

Reasoning out : 2.5 Marks
Explanation 2.5 Marks

Eno is a mixture of soda bi carb and citric acid in required proportions. When it gets mixed with water the bubbles of carbon dioxide gas gets produced.
This carbon dioxide gas relieves bloating of the stomach, even the soda neutralizes the acids in the stomach.

This is clearly a chemical change as the reactants are different than the products.Heat is also emitted so it is an exothermic reaction too.

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Question 5

Salt can be separated from its solution (salt dissolved in water) because
(a) mixing of salt in water is a change that can be reversed by heating and melting of salt
(b) mixing of salt in water is a change that cannot be reversed
(c) mixing of salt in water is a permanent change
(d) mixing of salt in water is a change that can be reversed by evaporation

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