The number of hydrogen atoms present in 1 mole of sulphuric acid and 1 mole of sulphurous acid are (X) and (Y), respectively. Relationship between X and Y is …………… (X=Y / cannot compare X and Y).

Hydrocarbon X decolourises bromine in carbon tetrachloride, and hydrocarbon Y does not decolourise bromine water. Both of the compounds burn with a sooty flame. The molecular formula of X and Y is …………… (C₅H₁₂ and C₄H₈ / C₅H₈ and C₄H₁₀).

Cations are …………… (oxidised/ reduced) ions due to the …………… (gain/loss) of electrons by the neutral atom.

If a hydrocarbon has the formula of C₅₀H₉₈ , then it is likely to undergo …………… a/an (addition/ substitution) reaction, and the hydrocarbon is a/an …………… (saturated/ unsaturated hydrocarbon).