Question

When the solution so formed, is tested with litmus, what kind of colour change is expected? Reason out your answer.

Answer 1

Given solution - Sodium hydroxide

The NaOH solution when tested -->

i) with blue litmus - We don't observe any color change.Blue remains as the same.
ii) with red litmus - We observe a color change from red to blue.

We can provide a reason why we observe such change. NaOH is one of the strongest bases. And we know bases change red litmus to blue. So that's why this color change was observed.

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Answer 2

Sodium hydroxide(NaOH) is a strong base. We know that basic solution turns red litmus to blue . Thus NaOH solution turns red litmus to blue.

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