Chemical Bonding And Molecular Structure - Inorganic Chemistry - Chemistry Previous Year Questions

1

2017 · Chemistry · Inorganic Chemistry · Chemical Bonding And Molecular Structure

KCET 2017

Which of the following structure of a molecule is expected to have three bond pairs and one lone pair of electrons?

A

Octahedral

B

Trigonal planar

C

Pyramidal

D

Tetrahedral

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2

2017 · Chemistry · Inorganic Chemistry · Chemical Bonding And Molecular Structure

KCET 2017

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

A

B

C

D

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3

2017 · Chemistry · Inorganic Chemistry · Chemical Bonding And Molecular Structure

KCET 2017

Which of the following elements forms $p_\pi-p_\pi$ bond with itself?

A

P

B

Se

C

N

D

Te

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4

2018 · Chemistry · Inorganic Chemistry · Chemical Bonding And Molecular Structure

KCET 2018

The state of hybrid orbitals of carbon in $\mathrm{CO}_2$, $\mathrm{CH}_4$ and $\mathrm{CO}_3^{2-}$ respectively is

A

$s p^3, s p^2$ and $s p$

B

$s p^3, s p$ and $s p^2$

C

$s p, s p^3$ and $s p^2$

D

$s p^2, s p^3$ and $s p$

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5

2018 · Chemistry · Inorganic Chemistry · Chemical Bonding And Molecular Structure

KCET 2018

Acidity of $\mathrm{BF}_3$ can be explained on which of the following concepts?

A

Arrhenius concept

B

Bronsted Lowry concept

C

Lewis concept

D

Bronsted Lowry as well as Lewis concept

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6

2018 · Chemistry · Inorganic Chemistry · Chemical Bonding And Molecular Structure

KCET 2018

The intramolecular hydrogen bond is present in

A

phenol

B

o-nitrophenol

C

p-nitrophenol

D

p-cresol

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7

2019 · Chemistry · Inorganic Chemistry · Chemical Bonding And Molecular Structure

KCET 2019

Which of the following possess net dipole moment?

A

\(\mathrm{SO}_2\)

B

\(\mathrm{BF}_3\)

C

\(\mathrm{BeCl}_2\)

D

\(\mathrm{CO}_2\)

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8

2019 · Chemistry · Inorganic Chemistry · Chemical Bonding And Molecular Structure

KCET 2019

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

A

\(\mathrm{I}_3^{+}, \mathrm{H}_2 \mathrm{O}\)

B

\(\mathrm{H}_2 \mathrm{O}, \mathrm{NF}_3\)

C

\(\mathrm{XeF}_4, \mathrm{NH}_3\)

D

\(\mathrm{SO}_4^{2-}, \mathrm{H}_2 \mathrm{S}\)

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9

2020 · Chemistry · Inorganic Chemistry · Chemical Bonding And Molecular Structure

KCET 2020

The formal charge on central oxygen atom in ozone is

A

\(-\)1

B

0

C

+2

D

+1

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10

2020 · Chemistry · Inorganic Chemistry · Chemical Bonding And Molecular Structure

KCET 2020

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

A

\(33.3 \%, 50 \%, 25 \%\)

B

\(33.3 \%, 25 \%, 50 \%\)

C

\(50 \%, 33.3 \%, 25 \%\)

D

\(25 \%, 50 \%, 33.3 \%\)

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11

2020 · Chemistry · Inorganic Chemistry · Chemical Bonding And Molecular Structure

KCET 2020

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

A

lone pair - bond pair repulsion exists in \(\mathrm{PH}_3\)

B

\(\mathrm{PH}_4^{+}\) has square planar structure

C

\(\mathrm{PH}_3\) has planar trigonal structure

D

hybridisation of \(\mathrm{P}\) changes when \(\mathrm{PH}_3\) is converted to \(\mathrm{PH}_4^{+}\)

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12

2020 · Chemistry · Inorganic Chemistry · Chemical Bonding And Molecular Structure

KCET 2020

Which of the following has the lowest boiling point?

A

\(\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{OH}\)

B

\(\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{NH}_2\)

C

\(\mathrm{CH}_3-\mathrm{O}-\mathrm{CH}_3\)

D

\(\mathrm{HCOOH}\)

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13

2020 · Chemistry · Inorganic Chemistry · Chemical Bonding And Molecular Structure

KCET 2020

Incorrectly matched pair is

A

\(\mathrm{XeO}_3\) pyramidal

B

\(\mathrm{XeF}_4\) tetrahedral

C

\(\mathrm{XeF}_6\) disorted octahedral

D

\(\mathrm{XeOF}_4\) square pyramidal

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14

2021 · Chemistry · Inorganic Chemistry · Chemical Bonding And Molecular Structure

KCET 2021

The correct order of boiling point in the following compounds is

A

\(\mathrm{HF}>\mathrm{H}_2 \mathrm{O}>\mathrm{NH}_3\)

B

\(\mathrm{H}_2 \mathrm{O}>\mathrm{HF}>\mathrm{NH}_3\)

C

\(\mathrm{NH}_3>\mathrm{H}_2 \mathrm{O}>\mathrm{HF}\)

D

\(\mathrm{NH}_3>\mathrm{HF}>\mathrm{H}_2 \mathrm{O}\)

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15

2021 · Chemistry · Inorganic Chemistry · Chemical Bonding And Molecular Structure

KCET 2021

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

A

\(100 \mathrm{~kJ} \mathrm{~mol}^{-1}\)

B

\(50 \mathrm{~kJ} \mathrm{~mol}^{-1}\)

C

\(200 \mathrm{~kJ} \mathrm{~mol}^{-1}\)

D

\(150 \mathrm{~kJ} \mathrm{~mol}^{-1}\)

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16

2021 · Chemistry · Inorganic Chemistry · Chemical Bonding And Molecular Structure

KCET 2021

Which of the following is an incorrect statement?

A

Hydrogen bonding is stronger than dispersion forces

B

Sigma bonds are stronger than \(\pi\)-bonds

C

Ionic bonding is non-directional

D

\(\sigma\)-electrons are referred to as mobile electrons

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17

2022 · Chemistry · Inorganic Chemistry · Chemical Bonding And Molecular Structure

KCET 2022

In oxygen and carbon molecule the bonding is

A

\(\mathrm{O}_2: 2 \sigma, 0 \pi ; \mathrm{C}_2: 0 \sigma, 2 \pi\)

B

\(\mathrm{O}_2: 1 \sigma, 1 \pi ; \mathrm{C}_2: 0 \sigma, 2 \pi\)

C

\(\mathrm{O}_2: 0 \sigma, 2 \pi ; \mathrm{C}_2: 2 \sigma, 0 \pi\)

D

\(\mathrm{O}_2: 1 \sigma, 1 \pi ; \mathrm{C}_2: 1 \sigma, 1 \pi\)

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18

2023 · Chemistry · Inorganic Chemistry · Chemical Bonding And Molecular Structure

KCET 2023

Which of the following statement is incorrect?

A

Bond length of \(\mathrm{O}_2>\) Bond length of \(\mathrm{O}_2^{2+}\)

B

Bond order of \(\mathrm{O}_2^{+}<\) Bond order of \(\mathrm{O}_2^{2-}\)

C

Bond length of \(\mathrm{O}_2>\) Bond length of \(\mathrm{O}_2^{2-}\)

D

Bond order of \(\mathrm{O}_2>\) Bond order of \(\mathrm{O}_2^{2-}\)

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19

2023 · Chemistry · Inorganic Chemistry · Chemical Bonding And Molecular Structure

KCET 2023

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

A

hydrogen bond

B

covaelent bond

C

co-ordinate bond

D

ionic bond

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20

2024 · Chemistry · Inorganic Chemistry · Chemical Bonding And Molecular Structure

KCET 2024

A pair of isoelectronic species having bond order of one is

A

$\mathrm{N}_2, \mathrm{CO}$

B

$\mathrm{N}_2, \mathrm{NO}^{+}$

C

$\mathrm{O}_2^{2-}, \mathrm{F}_2$

D

$\mathrm{CO}, \mathrm{NO}^{+}$

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