Artificial sweetener used in soft drinks is:

Which of the following possess reducing and non-reducing ends?

Which is the most abundant organic compound on Earth?

Aqueous solution of carbohydrate with $2$ drops of alcoholic solution of $\alpha$-naphthol and $H_{2}SO_{4}$ gives a ring at the junction. The colour of the ring is:

$P$: Monosaccharides can pass through the cell membrane.
$Q$: Monosaccharides are the simplest carbohydrates.

Which of the following is a monosaccharide?