Question # 1

Which of the hydrogen halides has the highest percentage of ionic character.

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HF

HBr

HCl

HI

Which one of the following molecules is paramagnetic.

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H2

He

N2

O2

Carbon atom in methane in hybridized.

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sp3

Sp2

Sp

dsp3

According to MOT, which molecular orbital has highest energy.

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sigma 1s

pi+ 2S

pi 2py

Pi+ 2px

Which pair are iso electronic.

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Na+ and Cl-

Na+ and Mg+2

N-3 and P-3

H+ and H-

Which of the following molecule has zero dipole moment.

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NH3

CHCl3

H2O

BF3

In a period of periodic table, atomic radii

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Increases

Decreases

Remain same

First decreases than increases

Forces of attraction between He atoms are.

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Hydrogen bonding

London forces

Debye forces

Ion dipole forces

The number of bonds in oxygen molecules.

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One sigma and One pi

One sigma and two Pi

Three sigma only

Two sig and two pi

Molecule in which the distance between two carbon atoms in the largest is.

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C2H6

C2H4

C2H2

C6H6

Which one of the following correctly describe the shape of NH3 molecules.

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tetrahedral

Pyramidal

Angular

Square planar

Which of the following species has unpaired electrons in antibonding molecular orbitals.

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O2⁺²

N2^-2

B2

F2

The molecule having zero dipole moment is.

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NH3

CHCl3

H2O

BF3

Which bond has more ionic characters in it.

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C - F

N - F

O - F

F - F

Which of the following molecules has a co-ordinate covalent bond

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NH₄CI

NaCI

HCI

AICI₃

VSEPR theory was proposed by

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Nyholn and Gillespie

Kossel

Lewis

Sidwick

An ionic compound A⁺B^-is most likely to be formed when

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The ionization energy of A is high and electron affinity of B is low

The ionization energy of A is low and electron affinity of B is high

Both the ionization energy of A and electron affinity of B are high

Both the ionization energy of A and electron affinity of B are low

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Chemistry Fsc Part 1 Chapter 6 Online Test MCQs With Answers

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