Which of the following pair of compound – melting point is correct?
I. Acetic acid – 290K
II. Ethanol – 156K
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. Both I and II.
Acetic acid- with the formula CH3COOH, is a polar carboxylic acid exhibiting strong hydrogen bonding. It melts at about 290 K, transitioning from a white crystalline solid to a liquid as temperature increases.
Acetic acid is a colorless liquid organic compound commonly used in vinegar. Its distinct sour taste and pungent odor make it a key ingredient in many culinary and industrial applications.
Ethanol- with the formula C₂H₅OH, is a clear, flammable liquid with a melting point of around 156 K. It freezes at lower temperatures than acetic acid due to its molecular structure and weaker hydrogen bonding.
It is widely used in alcoholic beverages, as a solvent, and as a biofuel, due to its versatile properties.