Chemical Bonding Molecular Structure

This is an MCQ-based quiz on the topic of Chemical Bonding Molecular Structure.

This includes Octet rule, Covalent bond, Polarity of bonds, Valence bond theory, Molecular orbital theory, Bond Parameters, Hydrogen Bonding, and many more.

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What are the exceptions of the octet rule ?

All of these Expanded octet of the central atom An odd number of electrons on central atom The incomplete octet of central atom

Among the following the electron deficient compound is

BCl3 PCl5 CCl4 BeCl2

Which of the following is the electron deficient molecule?

B2H6 PH3 SiH4 None of these

Which of the following compounds does not follow the octet rule for electron distribution?

PCl5 H2O PH3 PCl3

Which of the following pairs will form the most stable ionic bond ?

Mg and F Na and F Na and Cl Li and F

Which of the following methods is used for measuring bond length ?

All of these Spectroscopic techniques Electron-diffraction X-ray diffraction

Dipole-induced dipole interactions are present in?

H2O and alcohol Cl2 and CCl4 HCl and He atoms SiF4 and He atoms

The number of types of bonds between two carbon atoms in calcium carbide is

Two sigma, two pi One sigma, two pi One sigma, one pi Two sigma, one pi

Based on lattice enthalpy and other considerations which one the following alkali metals chlorides is expected to have the higher melting point?

RbCl KCl NaCl LiCl

The charge/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of the polarizing order of the polarizing power of the cationic species, K+, Ca++, Mg2+, Be2+?

Ca2+ < Mg2+ < Be+ < K+ Mg2+ < Be2+ < K+ < Ca2+ Be2+ < K+ < Ca2+ < Mg2+ K+ < Ca2+ < Mg2+ < Be2+

Which one of the following has a pyramidal shape?

SO3 PCl3 CO32- NO3–

Which of the molecules does not have a permanent dipole moment?

SO3 SO2 H2S CS2

The formal charge and P-O bond order in PO43- respectively are

0.6, -0.75 -0.75, 1.25 1.0, -0.75 1.25, -3

Find the pair with sp2 hybridisation of the central molecule

NH3 and NO2– BF3 and NH2– BF3 and NO2– NH2– and H2O

MA6 is a molecule with octahedral geometry. How many A – M – A bonds are at 180°?

Four

Two