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Question

When vinegar is added to baking soda, confirms the occurrence of a chemical change.

A
change in state
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B
evolution of gas
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C
change in colour
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Solution

The correct option is B evolution of gas
Vinegar (acetic acid) reacts with baking soda (sodium bicarbonate) to form sodium acetate salt along with carbon dioxide gas and water. This can be represented as:

Acetic acid + Sodium bicarbonate Sodium acetate + Carbon dioxide + Water

The carbon dioxide gas evolved causes effervescence and confirms the occurrence of a chemical change.

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