Question # 1

VSEPR theory was proposed by

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Nyholn and Gillespie

Kossel

Lewis

Sidwick

Which one of the following has no tendency of form coordinate covalent bond with H+

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NH3

H2O

CH4

CH3OH

Which bond has more ionic characters in it.

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C - F

N - F

O - F

F - F

Which molecules is 100% covalent

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H2

H2O

HF

NH3

Which molecule has sG2 hybridization.

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CH4

C2H4

C2H2

C2H5

Which of the following statements is not correct regarding bonding molecular orbitals

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Bonding molecular orbitals possess less energy than atomic orbitals from which they are formed

Bonding molecular orbitals have low electron density between the two nuclei

Every electron in the bonding molecular orbitals contributes to the attraction between atoms

Bonding molecular orbitals are formed when the electron waves undergo constructive interference

The molecular shape of SO3 is.

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Triangular planar

Tetrahedral

Pyramidal

Linear

The H - H Bond energy in KJ mole -1 is.

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346

436

463

336

The octet rule in not followed in the formation of

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NF₃

CF₄

CCI₄

PCI₅

Which has zero potential energy.

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When H atom is independent

When two H atoms combine to form H2 molecule

When two H atoms super impose to each other

When two H atoms have weak attraction between them

The carbon atom is C2H4 is.

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sp3 hybridized

sG2 hybridized

Sp hybridized

dsG2 bybridized

The bond angle in NH3 molecule is

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109.5^o

107.5^o

104.5^o

106^o

Which of the following molecules have unpaired electrons is the bonding molecular orbitals.

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N2

O2

B2

F2

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

Which of the following is a polar molecule

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CCl4

HCl

BF3

CO2

Which one of the following molecules is paramagnetic.

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H2

He

N2

O2

______ Molecule has zero dipole moment.

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CO

H2S

SO2

CH4

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