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Q.

Which of the following compounds turns red litmus to blue?


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a

Methanol

b

Ethanol

c

Ethanoic Acid

d

Sodium Hydroxide 

answer is D.

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Detailed Solution

Sodium hydroxide will change the colour of the litmus paper from red to blue.
The litmus paper is used as an indicator to determine the pH value of a compound. An acid will turn a blue litmus paper into red and a base turns red litmus to blue on the other hand a neutral compound does not change the colour of litmus.
 
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