Question # 1

Carbon atom in methane in hybridized.

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sp3

Sp2

Sp

dsp3

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

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HF

HBr

HCl

HI

The molecular shape of SO3 is.

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Triangular planar

Tetrahedral

Pyramidal

Linear

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

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NH₄CI

NaCI

HCI

AICI₃

The bond angle in NH3 molecule is

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109.5^o

107.5^o

104.5^o

106^o

The octet rule in not followed in the formation of

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NF₃

CF₄

CCI₄

PCI₅

A molecule has two ions pairs and two bond pairs around the central atom. The shape of molecule is.

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Linear

Pyramidal

Angular

Tetrahedral

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

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NH3

H2O

CH4

CH3OH

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

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O2⁺²

N2^-2

B2

F2

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

Which one of the following molecules is paramagnetic.

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H2

He

N2

O2

Which element has highest ionization potential.

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Li

B

Be

C

In methanol, bond between carbon and oxygen.

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Ionic

Non polar

Polar

Co - ordinate

Which of the following has bond angle of 120 ^o

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BeCl2

BF3

CH4

NH3

Bond energy depends upon

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Electronegativity

Size of atom

Bond length

All of these

Which of the following species has unpaired electrons in anti-bonding molecular orbitals

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O₂⁺²

N₂^-2

B₂

F₂

Which of the following is a polar molecule

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CCl4

HCl

BF3

CO2

Ionic bond is formed by combination of groups

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IA and VIII

II A and VII A

IV A and VA

VIA and VII A

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