pH can be detected by :

litmus paper

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pH meter

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phenolphthalein

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all of the above

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Solution

The correct option is D all of the above
Indicators may be used to measure pH, by making use of the fact that their color changes with pH. Visual comparison of the color of a test solution with a standard color chart provides a means to measure pH accurate to the nearest whole number. Litmus paper is most widely used to check the pH of a solution. pH meter gives the strength of acidity or basicity of a solution. Phenolphthalein can be used to distinguish between acids and bases.

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Similar questions

When blue litmus paper is dipped into the water, the colour of litmus paper remains same. Similarly, when red litmus paper is dipped into the water, the colour remains same. By the above observation, we can conclude that:

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(d) none of the above.

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