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Test: Chemical Bonding & Molecular Structure - 2 - NEET MCQ


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30 Questions MCQ Test Topic-wise MCQ Tests for NEET - Test: Chemical Bonding & Molecular Structure - 2

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Test: Chemical Bonding & Molecular Structure - 2 - Question 1

There is no S-S bond in

Detailed Solution for Test: Chemical Bonding & Molecular Structure - 2 - Question 1


Test: Chemical Bonding & Molecular Structure - 2 - Question 2

Which of the following molecules are expected to exhibit intermolecular H-bonding

I. Acetic acid

II. o-nitrophenol

III. m-nitrophenol

IV. o-boric acid

Detailed Solution for Test: Chemical Bonding & Molecular Structure - 2 - Question 2



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Test: Chemical Bonding & Molecular Structure - 2 - Question 3

A : tetracyanomethane                           B : Carbondioxide

C : Benzene                                           D : 1, 3-buta-di-ene

Ratio of σ and π bond is in order:

Detailed Solution for Test: Chemical Bonding & Molecular Structure - 2 - Question 3

(A) Tetra cyanomethane


Test: Chemical Bonding & Molecular Structure - 2 - Question 4

Which of the following models best describes the bonding within a layer of the graphite structure ?

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Test: Chemical Bonding & Molecular Structure - 2 - Question 5

In  , the shape is square planer. The number of bond pair-lone pair repulsion at 90° are :

Detailed Solution for Test: Chemical Bonding & Molecular Structure - 2 - Question 5


⇒ No of bond pair-lone pair repulsion = 8

Test: Chemical Bonding & Molecular Structure - 2 - Question 6

In which of the following molecules / ions all the bonds are not of equal length.

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Test: Chemical Bonding & Molecular Structure - 2 - Question 7

The critical temperature of water is higher than that of O2 because the H2O molecules has :

Detailed Solution for Test: Chemical Bonding & Molecular Structure - 2 - Question 7

⇒ H2O is polar molecule
⇒ Hence  H2O has higher critical temp

Test: Chemical Bonding & Molecular Structure - 2 - Question 8

Compound with maximum ionic character is formed from :

Detailed Solution for Test: Chemical Bonding & Molecular Structure - 2 - Question 8

for maximum ionic character,
* IE of cation must be less
* EA of anion must be larger
⇒ CS and  F
⇒ (B)

Test: Chemical Bonding & Molecular Structure - 2 - Question 9

Mg2C3 reacts with water forming propyne, C3 4- has

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Test: Chemical Bonding & Molecular Structure - 2 - Question 10

Which of the following has a geometry different from the other three species (having the same geometry)?

Detailed Solution for Test: Chemical Bonding & Molecular Structure - 2 - Question 10




Test: Chemical Bonding & Molecular Structure - 2 - Question 11

Which of the following molecule does not have open book structure.

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Test: Chemical Bonding & Molecular Structure - 2 - Question 12

The hybridisation and geometry of BrF3 molecules are :

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Test: Chemical Bonding & Molecular Structure - 2 - Question 13

Pick out the incorrect statement ?

Detailed Solution for Test: Chemical Bonding & Molecular Structure - 2 - Question 13

(A) N2 B.O = 3 B.O α stability
N2+ B.O = 2.5
Correct Statement
(B) O2 ⇒ B.O = 2
O2 ⇒ B.O = 2.5 ⇒ Correct Statement

(D) NO+, B.O. = 3
NO, B.O = 2.5
= Correct statement

Test: Chemical Bonding & Molecular Structure - 2 - Question 14

Ethanol has a higher boiling point than dimethyl ether though they have the same molecular weight. This is due to :

Detailed Solution for Test: Chemical Bonding & Molecular Structure - 2 - Question 14


⇒ due to intermolecular H-bond, it has higher b.p. than CH3OCH3

Test: Chemical Bonding & Molecular Structure - 2 - Question 15

A simplified application of MO theory to the hypothetical ‘molecule’ OF would give its bond order as

Detailed Solution for Test: Chemical Bonding & Molecular Structure - 2 - Question 15

Test: Chemical Bonding & Molecular Structure - 2 - Question 16

Which of the following contains electrovalent and covalent bonds ?

Detailed Solution for Test: Chemical Bonding & Molecular Structure - 2 - Question 16


Test: Chemical Bonding & Molecular Structure - 2 - Question 17

Which of the following species is paramagnetic ?

Detailed Solution for Test: Chemical Bonding & Molecular Structure - 2 - Question 17


Test: Chemical Bonding & Molecular Structure - 2 - Question 18

Bond order of Be2 is

Detailed Solution for Test: Chemical Bonding & Molecular Structure - 2 - Question 18

Test: Chemical Bonding & Molecular Structure - 2 - Question 19

The volatility of HF is low because of :

Detailed Solution for Test: Chemical Bonding & Molecular Structure - 2 - Question 19

due to H–bond,
HF has Low volatility

Test: Chemical Bonding & Molecular Structure - 2 - Question 20

Which of the following sets of characteristics leads to the increase in solubility of ionic substances ?

Detailed Solution for Test: Chemical Bonding & Molecular Structure - 2 - Question 20

High dipole moment and strong attraction by ions means that they can form intermolecular Hydrogen bond with water molecules. High solvation energy means that when the compound is dropped into water, then when the compound forms H-bond with water, then a high amount of energy is released. This is favourable to solubility as more heat is released, more the compound becomes soluble.

Test: Chemical Bonding & Molecular Structure - 2 - Question 21

Dipole-induced dipole interactions are present in which of the following pairs?

Detailed Solution for Test: Chemical Bonding & Molecular Structure - 2 - Question 21

Dipole-induced dipole interaction is present in the pair in which the first species is polar and the other is non-polar.
H2O and alcohol both are non-polar so there exist dipole-dipole interactions in between them.
Cl2 and CCl4 both are non-polar so there exists induced dipole -induced dipole interactions in between them. Similarly is true for SiCl4 and He atoms pair.

HCl is a polar molecule, whereas He atoms are non-polar, so in between them dipole-induced dipole interactions exist.

Test: Chemical Bonding & Molecular Structure - 2 - Question 22

Which one of the following conversions involve change in both hybridization and shape?

Detailed Solution for Test: Chemical Bonding & Molecular Structure - 2 - Question 22

Hybridisation -

The process of mixing of atomic orbitals belonging to the same atoms of slightly different energies so that a redistribution of energy takes place between them  resulting in the formation of new set of orbital of equivalent energies and shape is called hybridisation.- wherein The new orbitals thus formed are called hybrid orbitals.

Test: Chemical Bonding & Molecular Structure - 2 - Question 23

The molecule is not having 3c-2e bond.

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Test: Chemical Bonding & Molecular Structure - 2 - Question 24

Among KO2, AlO-2 ,BaO2 and NO+2 unpaired electron is present in :

Detailed Solution for Test: Chemical Bonding & Molecular Structure - 2 - Question 24

 contain one unpaired electron so paramagnetic

Test: Chemical Bonding & Molecular Structure - 2 - Question 25

Which has maximum dipole moment ?

Detailed Solution for Test: Chemical Bonding & Molecular Structure - 2 - Question 25



Test: Chemical Bonding & Molecular Structure - 2 - Question 26

Ethanol has a higher boiling point than dimethyl ether though they have the same molecular weight. This is due to :

Detailed Solution for Test: Chemical Bonding & Molecular Structure - 2 - Question 26


⇒ due to intermolecular H-bond, it has higher b.p. than CH3OCH3

Test: Chemical Bonding & Molecular Structure - 2 - Question 27

Arrange the following in order of decreasing boiling point :

(I) n-Butane (II) n-Butanol (III) n-Butyl chloride (IV) Isobutane

Detailed Solution for Test: Chemical Bonding & Molecular Structure - 2 - Question 27

(I) H3C—CH2—CH2—CH3 n-butane




II > III >I > IV
As H-bond>d Interaction
> st. chain > Branch chain

Test: Chemical Bonding & Molecular Structure - 2 - Question 28

Which of the following compounds would have significant intermolecular hydrogen bonding ?

HF, CH3OH, N2O4, CH4

Detailed Solution for Test: Chemical Bonding & Molecular Structure - 2 - Question 28


⇒ due to intermolecular H-bond, it has higher b.p. than CH3OCH3

Test: Chemical Bonding & Molecular Structure - 2 - Question 29

For H2O2, H2S, H2O and HF , the correct order of decreasing extent of hydrogen bonding is :

Detailed Solution for Test: Chemical Bonding & Molecular Structure - 2 - Question 29

Test: Chemical Bonding & Molecular Structure - 2 - Question 30

A simplified application of MO theory to the hypothetical `molecule' OF would give its bond order as

Detailed Solution for Test: Chemical Bonding & Molecular Structure - 2 - Question 30

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