Elements P and Q form two types of non-volatile, non-ionizable compounds PQ and PQ₂. When 1 g of PQ is dissolved in 50 g of solvent 'A', Δ T b was 1.176 K while when 1 g of PQ₂ is dissolved in 50 g of solvent 'A', Δ T b was 0.689 K. (K b of 'A' =5 K kg mol ⁻¹). The molar masses of elements P and Q (in g mol ⁻¹) respectively, are:

Solutions: JEE Main 2026 Chemistry question

JEE Main 2026 · 21 Jan, Morning shift · Q52

JEE Main 202621 Jan, Morning shiftChemistryMediumSolutions71× since 2002

Elements P and Q form two types of non-volatile, non-ionizable compounds PQ and

\mathrm{PQ_2}

. When 1 g of PQ is dissolved in 50 g of solvent 'A',

\Delta T_b

was 1.176 K while when 1 g of

\mathrm{PQ_2}

is dissolved in 50 g of solvent 'A',

\Delta T_b

was 0.689 K. (

K_b

of 'A'

=5

K kg mol

^{-1}

). The molar masses of elements P and Q (in g mol

^{-1}

) respectively, are :