Question

A and B are the two solutions with pH 1 and 13 respectively.
The colour of pH paper when dipped in solution A and B
respectively will be

Answer 1

Answer:

Blue to red and Red to blue.

Explanation:

As per the pH scale -

pH <7 - acidic

pH =7 - neutral

pH >7 - basic

So, pH = 1 - acidic solution- turns blue litmus to red

and pH =13 - basic solution- turns red litmus to blue

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Answer 2

Answer:

red and blue respectively

Explanation:

When the pH paper is dipped in solution A which is having a pH 1, then the colour of pH paper changes to red as solution A is acidic.

When the pH paper is dipped in solution B which is having a pH 13, then the colour of pH paper changes to blue as solution B is basic.

The solution which has a pH less than 7 represents an acidic solution which changes blue litmus to red while solution which has pH greater than 7 represents an basic solution which changes red litmus to blue. The solution which has the pH equal to 7 represents the neutral solution.

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