Which one of the following has the shortest carbon-carbon bond length?
- Benzene
- Ethene
- Ethyne
- Ethane
The Correct Option is C
Solution and Explanation
$\hspace15mm C\equiv C < C= C < C - C$
Top NEET Chemistry Questions
- Given below are two statements:
Statement I: A hypothetical diatomic molecule with bond order zero is quite stable.
Statement II: As bond order increases, the bond length increases.
In the light of the above statements, choose the most appropriate answer from the options given below:- NEET (UG) - 2025
- Chemistry
- Chemical bonding and molecular structure
Identify the correct orders against the property mentioned:
A. H$_2$O $>$ NH$_3$ $>$ CHCl$_3$ - dipole moment
B. XeF$_4$ $>$ XeO$_3$ $>$ XeF$_2$ - number of lone pairs on central atom
C. O–H $>$ C–H $>$ N–O - bond length
D. N$_2$>O$_2$>H$_2$ - bond enthalpy
Choose the correct answer from the options given below:- NEET (UG) - 2025
- Chemistry
- Chemical bonding and molecular structure
Identify the suitable reagent for the following conversion: $Ph-C(=O)-OCH_3$ $\longrightarrow$ $Ph-CHO$
- NEET (UG) - 2025
- Chemistry
- Organic Chemistry
- How many products (including stereoisomers) are expected from monochlorination of the following compound?
$CH_3-CH-CH_2-CH_3$- NEET (UG) - 2025
- Chemistry
- Organic Chemistry
- The correct order of decreasing acidity of the following aliphatic acids is:
- NEET (UG) - 2025
- Chemistry
- Organic Chemistry
Top NEET Chemical bonding and molecular structure Questions
- Given below are two statements:
Statement I: A hypothetical diatomic molecule with bond order zero is quite stable.
Statement II: As bond order increases, the bond length increases.
In the light of the above statements, choose the most appropriate answer from the options given below:- NEET (UG) - 2025
- Chemistry
- Chemical bonding and molecular structure
Identify the correct orders against the property mentioned:
A. H$_2$O $>$ NH$_3$ $>$ CHCl$_3$ - dipole moment
B. XeF$_4$ $>$ XeO$_3$ $>$ XeF$_2$ - number of lone pairs on central atom
C. O–H $>$ C–H $>$ N–O - bond length
D. N$_2$>O$_2$>H$_2$ - bond enthalpy
Choose the correct answer from the options given below:- NEET (UG) - 2025
- Chemistry
- Chemical bonding and molecular structure
- Match List-I with List-II :Identify the correct answer from the options given below :
List - IMolecule List - IIBond enthalpy (kJ mol-1) (A) HCl (I) 435.8 (B) N2 (II) 498 (C) H2 (III) 946.0 (D) O2 (IV) 431.0 - NEET (UG) - 2024
- Chemistry
- Chemical bonding and molecular structure
- Amongst the following, the total number of species NOT having eight electrons around central atom in its outer most shell, is NH3, AICI3, BeCl2, CCl4, PCI5 :
- NEET (UG) - 2023
- Chemistry
- Chemical bonding and molecular structure
- Consider the following compounds/species:
i)
ii)
iii)
iv)
v)
vi)
vii)
The number of compounds/species which obey Huckel's rule is _____- NEET (UG) - 2023
- Chemistry
- Chemical bonding and molecular structure
Top NEET Questions
- Which of the following enzyme(s) are NOT essential for gene cloning?
A. Restriction enzymes
B. DNA ligase
C. DNA mutase
D. DNA recombinase
E. DNA polymerase- NEET (UG) - 2025
- Molecular Biology
- Match List - I with List II
List I List II A. The Evil Quartet III. Causes of biodiversity losses B. Ex situ conservation I. Cryopreservation C. Lantana camara II. Alien species invasion D. Dodo IV. Extinction Given below are two statements:
Statement I: The primary source of energy in an ecosystem is solar energy.
Statement II: The rate of production of organic matter during photosynthesis in an ecosystem is called net primary productivity (NPP).
In light of the above statements, choose the most appropriate answer from the options given below:- NEET (UG) - 2025
- Ecosystems
- Name the class of enzyme that usually catalyzes the following reaction: \[ S - G + S^{\prime} \rightarrow S + S^{\prime} - G \] Where \( G \) represents a group other than hydrogen, \( S \) is a substrate, and \( S^{\prime} \) is another substrate.
- A microscope has an objective of focal length \(f_o = 2\) cm and an eyepiece of focal length \(f_e = 4\) cm. The tube length of the microscope is \(L = 40\) cm. If the distance of distinct vision of eye is \(D = 25\) cm, the magnification in the microscope is:
- NEET (UG) - 2025
- Optical Instruments
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