Question

Which one of the following are the correct observations about acetic acid?; A. It turns blue litmus red and smells like vinegar; B. It turns blue litmus red and smells like burning sulphur; C. It turns red litmus blue and smells like vinegar; D. It turns red litmus blue and has a fruity smell(All India - 2012)

Answer 1

A. It turns blue litmus red and smells like vinegar

Answer 2

The observation given in option A is correct related to acetic acid.

Explanation:

• The concept involved in this scenario is the properties of acetic acid. The following are the major properties of acetic acid ($CH_3COOH)$.

1. It is a compound that belongs to the carboxylic acid group and is acidic.
2. It has a strong pungent odor as that of the smell of vinegar.
3. It is readily soluble in water in any proportions.
4. It changes the color of blue litmus to red.

• From the properties mentioned in 2 and 4, the correct observation about acetic acid is inferred as option A which states that It turns blue litmus red and smells like vinegar.

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