Question

The solutions which do not change the colour of either red or blue litmus _____


A)Soap solution

B)Lemon juice

C)Distilled water

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Answer 1

Answer:

Distilled water is the answer.

Answer 2

Given Question:

The solutions which do not change the colour of either red or blue litmus _____

A)Soap solution

B)Lemon juice

C)Distilled water

Required Answer:

• C)Distilled water

Justification:

According to the chemical nature, substance (, here, solutions) can be categorised as acidic solution, basic solution or neutral solution.

• Acidic solutions

Blue Litmus → Red Litmus

Lemon juice is acidic solution because it contains citric acidic. So it will change blue litmus to red. Therefore, this option is incorrect.

${\boxed {\large {\tt {\red { Option \: B ⨉}}}}}$

• Basic Solutions

Red Litmus → Blue Litmus

We know that sodium hydroxide is used in making soaps, as sodium hydroxide is basic in nature so soap solution will also be basic in nature and it will change the red litmus to blue. Therefore, this option is also incorrect.

${\boxed {\large {\tt {\red { Option \: A ⨉}}}}}$

• Neutral Solution

→ No change on litmus paper ( either red or blue )

Distilled water is neither acidic solution nor basic solution, it is neutral solution. So, it'll show no change on litmus paper. Thus, this option is correct.

${\boxed {\large {\tt {\green { Option \: C ✓ }}}}}$

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