A student adds 2 mL of acetic acid to a test tube containing 2 mL of distilled water. He then shakes the test tube well and leaves it to settle for some time. After about 5 minutes he observes that in the test tube there is :

Question

$\begin{array}{1 1} \text{(a) a clear transparent colourless solution} \\ \text{ (b) a clear transparent pink solution} \\\text{ (c) a precipitate settling at the bottom of the test tube} \\ \text{ (d) a layer of water the layer of acetic acid} \end{array} $