By which we can measure the exact $p H$ of aqueous solution?

pH meter

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litmus paper

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pH paper

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universal indicator

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Solution

The correct option is A pH meter
$p H$ meter is used to measure $p H$ of an aqueous solution.
$p H$ meter consists of a voltmeter attached to reference and $p H$
$p H$ paper is general test of $p H$ .
Litmus paper acts as an indicator, exact $p H$ can't be determined by this.

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Similar questions

(a) What would you expect the pH of the pure water to be?

(b) What colour would the universal indicator show in an aqueous solution of sugar? Why?

(c) A sample of rainwater turned universal indicator paper yellow. What would you expect its pH to be? Is it a strong or a weak acid?

Which of the following can be used to measure pH?

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