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NEET CHEMISTRYOrganic Chemistry – Some Basic Principles and Techniques Medium

Question

In which of the following compounds is an intramolecular hydrogen bond present?

A

H2O2\text{H}_2\text{O}_2

B

HCN\text{HCN}

C

Cellulose

D

Concentrated acetic acid

Step-by-Step Solution

Let us examine the types of hydrogen bonding in the given compounds:

  1. H2O2\text{H}_2\text{O}_2: Forms extensive intermolecular hydrogen bonds, linking different H2O2\text{H}_2\text{O}_2 molecules together.
  2. HCN\text{HCN}: Forms linear chains through intermolecular hydrogen bonds between the hydrogen of one molecule and the nitrogen of another.
  3. Concentrated acetic acid: Exists as a dimer due to the formation of two intermolecular hydrogen bonds between two acetic acid molecules.
  4. Cellulose: It is a linear polymer of β\beta-D-glucose units. Extensive intramolecular hydrogen bonding occurs between the hydroxyl group at C-3 of one glucose unit and the ring oxygen (O-5) of the adjacent glucose unit in the same polymeric chain. This gives cellulose its characteristic rigid, straight-chain structure.

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.

CHEMISTRYOrganic Chemistry – Some Basic Principles and Techniques followingcompoundsintramolecularhydrogenpresent

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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 $\text{NH}_4^+$
MediumSolve

Among the following, isoelectronic species are:

A.$CO_{2}, NO_{2}$
B.$NO_{2}^{-}, CO_{2}$
C.$CN^{-}, CO$
D.$SO_{2}, CO_{2}$
EasySolve

Which one of the following pairs of species have the same bond order?

A.$\text{CO}$, $\text{NO}$
B.$\text{O}_2^-$, $\text{CN}^-$
C.$\text{CN}^-$, $\text{NO}^+$
D.$\text{N}^+$, $\text{CN}^+$
MediumSolve

In a regular octahedral molecule, $MX_{6}$, the number of $X–M–X$ bonds at 180º is:

A.Two
B.Six
C.Four
D.Three
EasySolve

Which of the following pairs of ions are isoelectronic and isostructural?

A.CO₃²⁻, SO₃²⁻
B.ClO₃⁻, CO₃²⁻
C.SO₃²⁻, NO₃⁻
D.ClO₃⁻, SO₃²⁻
MediumSolve

Which orbital does the additional electron occupy when $O_{2}$ is converted to the $O_{2}^{-}$ ion?

A.$\pi$ orbital
B.$\sigma^{*}$ orbital
C.$\sigma$ orbital
D.$\pi^{*}$ orbital
MediumSolve

A species that does not exhibit paramagnetism is:

A.$N_{2}^{+}$
B.$O_{2}^{-}$
C.$CO$
D.$NO$
MediumSolve

The total number of $\pi$-bond electrons in the following structure is:

A.4
B.8
C.12
D.16
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