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NEET CHEMISTRYOrganic Chemistry – Some Basic Principles and Techniques Medium

Question

Which one of the following species has a plane triangular shape?

A

N3−N_3^-

B

NO3−NO_3^-

C

NO2−NO_2^-

D

CO2CO_2

Step-by-Step Solution

  1. Analyze NO3−NO_3^- (Nitrate Ion): The central Nitrogen atom has 5 valence electrons. An electron is added for the negative charge, making 6. It forms sigma bonds with 3 Oxygen atoms (and \pi bonds which don't affect steric number). There are 3 bonding domains and 0 lone pairs.
  • Hybridization: sp2sp^2 [Concept linked to Hybridisation types in Class 12 Chemistry, Table 5.2].
  • Shape: Trigonal Planar (Plane Triangular).
  1. Analyze N3−N_3^- (Azide Ion): Linear structure (spsp hybridization).
  2. Analyze NO2−NO_2^- (Nitrite Ion): Nitrogen is bonded to 2 Oxygen atoms and has 1 lone pair.
  • Hybridization: sp2sp^2.
  • Shape: Bent or Angular.
  1. Analyze CO2CO_2 (Carbon Dioxide): Carbon forms double bonds with two Oxygen atoms.
  • Hybridization: spsp.
  • Shape: Linear.

Exam Context & Concepts Covered

This question aligns with the NEET CHEMISTRY syllabus, specifically targeting concepts from Organic Chemistry – Some Basic Principles and Techniques . Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

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Which one of the following pairs is isostructural (i.e., having the same shape and hybridization)?

A.$\text{BCl}_3$ and $\text{BrCl}_3$
B.$\text{NH}_3$ and $\text{NO}_3^-$
C.$\text{NF}_3$ and $\text{BF}_3$
D.$\text{BF}_4^-$ and $\text{NH}_4^+$
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Among the following, isoelectronic species are:

A.$CO_{2}, NO_{2}$
B.$NO_{2}^{-}, CO_{2}$
C.$CN^{-}, CO$
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Which one of the following pairs of species have the same bond order?

A.$\text{CO}$, $\text{NO}$
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C.$\text{CN}^-$, $\text{NO}^+$
D.$\text{N}^+$, $\text{CN}^+$
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A.Two
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D.ClO₃⁻, SO₃²⁻
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Which orbital does the additional electron occupy when $O_{2}$ is converted to the $O_{2}^{-}$ ion?

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C.$\sigma$ orbital
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A species that does not exhibit paramagnetism is:

A.$N_{2}^{+}$
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A.4
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