A student was given a solution to find its pH. His teacher declared his recorded pH as wrong. Student explained to his teacher, all the steps done by him while finding pH of sample. Mark the step taken by student in which he committed mistake.

(a) collection of apparatus.

(b) clearing of all apparatus

(c) making pH paper wet and then dip it in sample.

(d) recording observation.

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Solution

Making pH paper wet and then dip it in sample.

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