NEET 2026 (Phase 1) · ChemistryPrevious Year Question

The pair of molecules that are metamers among the following is:

Answer: (D) $CH X_{3} OCH X_{2} CH X_{2} CH X_{3}$ and $CH X_{3} CH X_{2} OCH X_{2} CH X_{3}$ . \textbf{Answer:} (d) \textbf{Solution:} Metamerism arises from different alkyl groups attached on either side of the same functional group (here, the ether oxygen).

A. $CH X_{3} CH X_{2} CH X_{2} OH$ and $CH X_{3} - CH (OH) - CH X_{3}$
B. $CH X_{3} CH X_{2} CH X_{2} CH X_{2} CH X_{3}$ and $(CH X_{3}) X_{2} CHCH X_{2} CH X_{3}$
C. $CH X_{3} CH X_{2} COOCH X_{3}$ and $CH X_{3} COOCH X_{2} CH X_{3}$
D. $CH X_{3} OCH X_{2} CH X_{2} CH X_{3}$ and $CH X_{3} CH X_{2} OCH X_{2} CH X_{3}$ ✓

Correct Answer

(D) $CH X_{3} OCH X_{2} CH X_{2} CH X_{3}$ and $CH X_{3} CH X_{2} OCH X_{2} CH X_{3}$

Solution & Explanation

\textbf{Answer:} (d) \textbf{Solution:} Metamerism arises from different alkyl groups attached on either side of the same functional group (here, the ether oxygen). $CH X_{3} - O - CH X_{2} CH X_{2} CH X_{3}$ (methyl propyl ether) and $CH X_{3} CH X_{2} - O - CH X_{2} CH X_{3}$ (diethyl ether) have the same molecular formula $C X_{4} H X_{10} O$ but different alkyl groups around oxygen, so they are metamers. Option (A) is functional/position isomerism (alcohols), (B) is chain isomerism (alkanes), and the esters in (C) are not metamers.

🎯

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

Practice NEET 2026 (Phase 1) 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 General Principles Of Organic Chemistry concepts →

← Chemistry Q40 Chemistry Q42 →

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 2026 (Phase 1) Chemistry PYQs · NEET Chemistry PYQs · All NEET PYQs · Previous year papers