NEET 2023 Phase 2 · ChemistryVBT and MOPrevious Year Question

Which one of the following statements is incorrect related to Molecular Orbital Theory?

Answer: (A) Molecular orbitals obtained from $2 p_{x}$ and $2 p_{x}$ orbitals are symmetrical around the bond axis.. \textbf{Answer:} (A) Molecular orbitals obtained from $2 p_{x}$ and $2 p_{x}$ orbitals are symmetrical around the bond axis.

A.Molecular orbitals obtained from $2 p_{x}$ and $2 p_{x}$ orbitals are symmetrical around the bond axis.✓
B.A $π$ -bonding molecular orbital has larger electron density above and below the internuclear axis.
C.The $π^{*}$ antibonding molecular orbital has a node between the nuclei.
D.In the formation of a bonding molecular orbital, the two electron waves of the bonding atoms reinforce each other.

Correct Answer

(A) Molecular orbitals obtained from $2 p_{x}$ and $2 p_{x}$ orbitals are symmetrical around the bond axis.

Solution & Explanation

\textbf{Answer:} (A) Molecular orbitals obtained from $2 p_{x}$ and $2 p_{x}$ orbitals are symmetrical around the bond axis. \textbf{Solution:} Lateral (sidewise) overlap of $2 p_{x}$ (or $2 p_{y}$ ) orbitals gives $π$ molecular orbitals, which are NOT symmetrical about the bond axis; only the axial $2 p_{z}$ overlap gives a $σ$ MO symmetrical around the bond axis. Hence statement (A) is incorrect.

🎯

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

Practice NEET 2023 Phase 2 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 Chemical Bonding concepts →

← Chemistry Q18 Chemistry Q20 →

More NEET PYQ solutions

ChemThe correct order of decreasing acidity of the following aliphatic acids is:ChemWhich one of the following reactions does NOT belong to Lassaigne's test?ChemHow many products (including stereoisomers) are expected from the monochlorination of 2-methylbutane, (CH3)2CH-CH2-CH3?ChemThe total number of possible isomers (both structural as well as stereoisomers) of cyclic ethers of molecular formula C4H8O is:ChemAmong the given compounds I-III, the correct order of bond dissociation energy of the C-H bond marked with an asterisk (*) is:ChemThe correct order of decreasing basic strength of the given amines is:ChemMatch List I (Mixture) with List II (Method of Separation). List I A. CHCl3 + C6H5NH2 B. Crude oil in the petroleum industry C. Glycerol from spent-lye D. Aniline-water List II I. Distillation under reduced pressure II. Steam distillation III. Fractional distillation IV. Simple distillation ChemWhich one of the following compounds can exist as cis-trans isomers?

More: All NEET 2023 Phase 2 Chemistry PYQs · NEET Chemistry PYQs · All NEET PYQs · Previous year papers