Second ionization enthalpy of carbon atom is less than that of boron atom.

Increasing order of ionic radii: Al³⁺ < Mg²⁺ < Na⁺

Under identical conditions, in solid state, the density of potassium metal is more than density of sodium metal.

The H–H bond is weaker than F–F bond.

Q on treatment with ethanol generates an aromatic aldehyde.

S gives positive phthalein dye test.

P is a dinitro compound.

T is a coloured compound.

On treatment with HNO₃, gluconic acid is oxidized to saccharic acid, whereas glucose is not oxidized to saccharic acid.

Fructose gives a positive Fehling’s test because it isomerises to glucose and another aldohexose in the presence of Fehling’s reagent.

Invert sugar is an equimolar mixture of D-glucose and D-fructose formed after hydrolysis of the corresponding disaccharide.

Specific rotation of invert sugar is −40°.