Chemical Bonding and Molecular Structure · Chemistry · KCET

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MCQ (Single Correct Answer)

1

A pair of isoelectronic species having bond order of one is

KCET 2024
2

Which of the following statement is incorrect?

KCET 2023
3

Dimerisation of solute molecules in low dielectric constant solvent is due to

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4

In oxygen and carbon molecule the bonding is

KCET 2022
5

Which of the following is an incorrect statement?

KCET 2021
6

The correct order of boiling point in the following compounds is

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7

Bond enthalpies of $$A_2, B_2$$ and $$A B$$ are in the ratio $$2: 1: 2$$. If bond enthalpy of formation of $$A B$$ is $$-100 \mathrm{~kJ} \mathrm{~mol}^{-1}$$. The bond enthalpy of $$B_2$$ is

KCET 2021
8

Bond angle is $$\mathrm{PH}_4^{+}$$ is more than that of $$\mathrm{PH}_3$$. This is because

KCET 2020
9

Incorrectly matched pair is

KCET 2020
10

Which of the following has the lowest boiling point?

KCET 2020
11

The percentage of $$s$$-character in the hybrid orbitals of nitrogen in $$\mathrm{NO}_2^{+}, \mathrm{NO}_3^{-}$$ respectively are

KCET 2020
12

The formal charge on central oxygen atom in ozone is

KCET 2020
13

Which of the following possess net dipole moment?

KCET 2019
14

Which of the following pair contains 2 lone pair of electrons on the central atom?

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15
The intramolecular hydrogen bond is present in
KCET 2018
16
The state of hybrid orbitals of carbon in $\mathrm{CO}_2$, $\mathrm{CH}_4$ and $\mathrm{CO}_3^{2-}$ respectively is
KCET 2018
17
Acidity of $\mathrm{BF}_3$ can be explained on which of the following concepts?
KCET 2018
18
Which of the following structure of a molecule is expected to have three bond pairs and one lone pair of electrons?
KCET 2017
19
Which of the following elements forms $p_\pi-p_\pi$ bond with itself?
KCET 2017
20

Which of the following is correct electron dot structure of $\mathrm{N}_2 \mathrm{O}$ molecule?

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