Jamb Chemistry CBT Practice Quiz

An unknown organic compound X has a relative molecular mass of 180. It is a colourless crystalline solid, readily soluble in water. X contains the element C, H, and O in the atomic ratio 1:2:1. The compound has a sweet taste and melts on heating. In the presence of yeast and in the absence of air X is converted to compound Y in the absence of air, X is converted to compound Y and colorless gas. Compound Y reacts with sodium metal to produce a gas Z which gives a €˜pop€™ sound with a glowing splint. Y also reacts with ethanoic acid to give a sweet smelling compound W.

A jet plane carrying 3,000 kg of ethane burns off all the gas-forming water and carbon dioxide. If all the carbondioxide is expelled and the water formed is condensed and kept on board the plane, then the gain in weight is

Solution X, Y, and Z have pH values 3.0, 5.0 and 9.0
respectively. Which of the following statements is
correct?