A student adds 4 ml of acetic to a test tube containing 4 ml of distilled water. He then shakes the test tube and leaves it to settle. After about 10 minutes he observes:(a) A layer of water over the layer of acetic acid. (b) A layer of acetic acid over the layer of water.(c)A precipitate settling at the bottom of the test tube.(d) A clear colourless solution.

Correct answer:  (d) A clear colourless solution.

Explanation: Acetic acid is completely miscible with water in all proportions, hence, it forms a clear colourless solution.