Which one of the following compounds shows the presence of intramolecular hydrogen bond?
- ${H_2O_2}$
- $HCN$
- Cellulose
- Concentrated acetic acid
The Correct Option is C
Solution and Explanation
Chain Conformations of Cellulose
Cellulose is a polysaccharide made up of β-glucose units linked by β-1,4-glycosidic bonds. The individual glucose molecules in the cellulose chain are held together by hydrogen bonds, which play a key role in stabilizing the structure of cellulose.
Stabilization of Chain Conformations:
The cellulose molecule adopts a specific chain conformation in which the chains are stabilized by the formation of hydrogen bonds. These bonds occur in a parallel arrangement to the glycosidic linkage between the glucose units. This bonding pattern helps to reinforce the structure of the cellulose and contributes to its strength and rigidity.
- Each glucose unit in the chain can form two hydrogen bonds with adjacent chains, which increases the overall stability of the cellulose structure.
- The hydrogen bonding between the chains is responsible for cellulose's high tensile strength, making it one of the most abundant and durable biopolymers in nature.
Conclusion:
The chain conformations of cellulose are stabilized by two hydrogen bonds in parallel to the glycosidic linkage, contributing to the strength and structural integrity of cellulose in plants and other organisms.
Top Questions on Chemical bonding and molecular structure
- Identify the geometry and hybridization of the central atom in SF₄.
- BITSAT - 2025
- Chemistry
- Chemical bonding and molecular structure
- Which of the following molecules has a trigonal planar shape?
- BITSAT - 2025
- Chemistry
- Chemical bonding and molecular structure
- Which of the following molecules has the highest bond angle?
- BITSAT - 2025
- Chemistry
- Chemical bonding and molecular structure
- Which of the following molecules has a linear shape?
- BITSAT - 2025
- Chemistry
- Chemical bonding and molecular structure
Resonance in X$_2$Y can be represented as
The enthalpy of formation of X$_2$Y is 80 kJ mol$^{-1}$, and the magnitude of resonance energy of X$_2$Y is:- JEE Main - 2025
- Chemistry
- Chemical bonding and molecular structure
Questions Asked in NEET exam
- Which of the following organisms cannot fix nitrogen? A. Azotobacter
B. Oscillatoria
C. Anabaena
D. Volvox
E. Nostoc
Choose the correct answer from the options given below:- NEET (UG) - 2025
- Nitrogen Fixation
- Which of the following are paramagnetic?
A. [NiCl$_4$]$^{2-}$
B. Ni(CO)$_4$
C. [Ni(CN)$_4$]$^{2-}$
D. [Ni(H$_2$O)$_6$]$^{2+}$
E. Ni(PPh$_3$)$_4$
Choose the correct answer from the options given below:- NEET (UG) - 2025
- Coordination chemistry
Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): A typical unfertilized, angiosperm embryo sac at maturity is 8-nucleate and 7-celled.
Reason (R): The egg apparatus has 2 polar nuclei.In the light of the above statements, choose the correct answer from the options given below:
- NEET (UG) - 2025
- Angiosperms
- A ball of mass 0.5 kg is dropped from a height of 10 m. The ball hits the ground and rises to a height of 1.5 m. The impulse imparted to the ball during its collision with the ground is : (Take \(g = 9.8 \, \text{m/s}^2\))
- NEET (UG) - 2025
- Collision and Impulse
- Consider the diameter of a spherical object being measured with the help of a Vernier Callipers. Suppose its 10 Vernier Scale Divisions (V.S.D.) are equal to its 9 Main Scale Divisions (M.S.D.). The least count in the M.S. is 0.1 cm and the zero of V.S. is at -0.1 cm when the jaws of Vernier callipers are closed. If the main scale reading for the diameter is \(M = 5\) cm and the number of coinciding vernier division is 8, the measured diameter after zero error correction, is:
- NEET (UG) - 2025
- Measurement of length
Concepts Used:
Chemical Bonding and Molecular Structure
Such a group of atoms is called a molecule. Obviously, there must be some force that holds these constituent atoms together in the molecules. The attractive force which holds various constituents (atoms, ions, etc.) together in different chemical species is called a chemical bond.
Types of Chemical Bonds:
There are 4 types of chemical bonds which are formed by atoms or molecules to yield compounds.
- Ionic Bonds - Ionic bonding is a type of chemical bonding which involves a transfer of electrons from one atom or molecule to another.
- Covalent Bonds - Compounds that contain carbon commonly exhibit this type of chemical bonding.
- Hydrogen Bonds - It is a type of polar covalent bonding between oxygen and hydrogen wherein the hydrogen develops a partial positive charge
- Polar Bonds - In Polar Covalent chemical bonding, electrons are shared unequally since the more electronegative atom pulls the electron pair closer to itself and away from the less electronegative atom.
Factors Affecting Bond Enthalpy in Chemical Bonding:
- Size of the Atom
- Multiplicity of Bonds
- Number of Lone Pair of Electrons Present
- Bond Angle