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MDCAT
Chemistry
2021

Chemistry · Carboxylic Acids and its Derivatives

Work through this past-paper style MCQ, then read the full explanation. Practice more chemistry questions on mMCQ with adaptive practice and topic analytics.

Question
Carboxylic acids turn?
Options
  • A
    Red litmus blue
  • B
    Blue litmus red
  • C
    Neutral to litmus
  • D
    No effect
Explanation

Correct option is B.The carboxylic acid turns blue litmus red because the hydroxyl group present in -COOH is far more acidic than in alcohol. Note: If the color of the blue litmus paper changes to red, then a carboxyl group is present.

This option is incorrect because the base turns red litmus into blue litmus.

This option is correct because the carboxylic acid turns blue litmus red because the hydroxyl group present in -COOH is far more acidic than in alcohol. Note: If the color of the blue litmus paper changes to red, then a carboxyl group is present. 

This option is incorrect because it is not neutral to litmus.

This option is incorrect because it is effected by litmus.

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Tagged under Chemistry · Carboxylic Acids and its Derivatives · 2021