NEET 2025 · ChemistryPrevious Year Question

Which of the following aqueous solution will exhibit highest boiling point?

Answer: (A) 0.01 M $Na X_{2} SO X_{4}$ . \textbf{Answer:} (A) 0.01 M $Na X_{2} SO X_{4}$ \textbf{Solution:} Elevation of boiling point is colligative: $Δ T_{b} = i K_{b} m$ , so the highest boiling point corresponds to the largest effective particle concentration $i \times m$ .

A.0.01 M $Na X_{2} SO X_{4}$ ✓
B.0.015 M $C X_{6} H X_{12} O X_{6}$
C.0.01 M Urea
D.0.01 M $KNO X_{3}$

Correct Answer

(A) 0.01 M $Na X_{2} SO X_{4}$

Solution & Explanation

\textbf{Answer:} (A) 0.01 M $Na X_{2} SO X_{4}$ \textbf{Solution:} Elevation of boiling point is colligative: $Δ T_{b} = i K_{b} m$ , so the highest boiling point corresponds to the largest effective particle concentration $i \times m$ . $Na X_{2} SO X_{4}$ ( $i = 3$ , $m = 0.01$ ): $im = 0.03$ . $KNO X_{3}$ ( $i = 2$ , $m = 0.01$ ): $im = 0.02$ . Glucose $C X_{6} H X_{12} O X_{6}$ ( $i = 1$ , $m = 0.015$ ): $im = 0.015$ . Urea ( $i = 1$ , $m = 0.01$ ): $im = 0.01$ . The largest value (0.03) is for 0.01 M $Na X_{2} SO X_{4}$ , which therefore has the highest boiling point.

🎯

43,000+ questions in हिंदी & English · one-tap toggle

Practice NEET 2025 Chemistry — free, with instant solutions

43,000+ NEET questions solved step-by-step, chapter-wise, in the MedicNEET app.

Open →📚Practice all NEET Chemistry PYQs chapter-wise →💡Don't get it? Learn the Solutions concepts →

← Chemistry Q32 Chemistry Q34 →

More NEET PYQ solutions

ChemIdentify the suitable reagent for the following conversion: C6H5COOCH3 -> C6H5CHO (methyl benzoate to benzaldehyde)ChemThe correct order of decreasing acidity of the following aliphatic acids is ChemThe major product of the following reaction is: 4-oxo-4-phenylbutanenitrile C6H5-CO-CH2-CH2-CN is treated with (i) CH3MgBr (excess) and then (ii) H3O+.ChemOut of the following complex compounds, which compound will have the minimum conductance in solution?ChemWhich of the following are paramagnetic? A. [NiCl4]^2- B. Ni(CO)4 C. [Ni(CN)4]^2- D. [Ni(H2O)6]^2+ E. Ni(PPh3)4 ChemThe correct order of the wavelength of light absorbed by the following complexes is: A. [Co(NH3)6]^3+ B. [Co(CN)6]^3- C. [Cu(H2O)4]^2+ D. [Ti(H2O)6]^3+ChemThe correct order of decreasing basic strength of the given amines is: (N-ethylethanamine = (C2H5)2NH; ethanamine = C2H5NH2; N-methylaniline = C6H5NH(CH3); benzenamine/aniline = C6H5NH2)ChemPredict the major product P in the following sequence of reactions. The starting material is 1-methylcyclopent-1-ene: (i) HBr, benzoyl peroxide; (ii) KCN; (iii) Na(Hg)/C2H5OH P (major). The structures of the options (A)-(D) are shown in the image below:

More: All NEET 2025 Chemistry PYQs · NEET Chemistry PYQs · All NEET PYQs · Previous year papers