Chemistry Question from JEE Main 2026 · 21 January, Shift 1

Elements P and Q form two types of non-volatile, non-ionizable compounds PQ and PQ₂. When $1 \, \text{g}$ of PQ is dissolved in $50 \, \text{g}$ of solvent 'A', $\Delta T_b$ was $1.176 \, \text{K}$ while when $1 \, \text{g}$ of PQ₂ is dissolved in $50 \, \text{g}$ of solvent 'A', $\Delta T_b$ was $0.689 \, \text{K}$. ($K_b$ of 'A' = $5 \, \text{K kg mol}^{-1}$). The molar masses of elements P and Q (in $\text{g mol}^{-1}$) respectively, are: