Which of the following is true when soap or detergent is added to water?

The anions of emulsion repel each other hence do not precipitate.

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The anions of emulsion attract each other hence do not precipitate.

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The anions of emulsion repel each other hence precipitate.

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The anions of emulsion attract each other hence precipitate.

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Solution

The correct option is A The anions of emulsion repel each other hence do not precipitate.
The following is true when soap or detergent is added to water.
The anions of emulsion repel each other hence do not precipitate. Since they have the same charge, there is an electrostatic force of repulsion between like charges. So they do not come closer and cannot coagulate.

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