Question # 1

The shape of methanol, ammonia and water molecule can be explained by assuming

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Sp³hybridization

Sp²hybridization

Sp hybridization

All of these

In OF₂, number of bond pairs and Ione paris of electrons are respectively

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2,6

2,8

2,10

2,9

The bond order of individual C - C bond is benzene is

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One

Two

Between one and two

One and two alternately

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

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O₂

N₂

Br₂

F₂

Shape of CIO₃is

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Triangular pyramidal

Tetrahedral

Triangular planar

Triangular bipyramidal

According to MO Theory, the species O₂+ possesses

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bond order of 2.5

three unpaired

diamagnetic character

stability lower then O₂

An ionic compound M₂S₃is formed by the metal M,, the metal is

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Ca

Ba

K

Al

Which of the following phenomena will occur when two atoms of the elements having same spin of electron approach for bonding?

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Orbital overlap will not occur

Bonding will not occur

Both (A) and (B) are correct

None of the above are correct

Molecular orbital picture of N₂indicates

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One unpaired electron

Two unpaired electron

No unpaired electron

None of these

The tendency of an atom to attract shared electron pair towards itself is called

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Covelent bond

Electronegativity

Ionization potential

Electronic affinity

Generally the bond formed by metals with non-metals is

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Ionic

Covalent

Polar

Non- polar

Which of the following species is paramagnetic?

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CO₂

NO

O^2-

CN

All covalent bonds formed between the two atoms are non-polar when

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Covalent bond between two non-metal atoms

Covalent bond between metal and non-metal

Covalent bond between two atoms of same element

Covalent bond between metal atoms

The bond angle H - O - H in ice ins closest to

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120° , 28^'

60°

90°

109°

The nature of interparticle forces in benzene is

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Dipole-dipole interaction

Dispersion force

Ion-dipole interaction

H-bonding

Which for the following has no dipole moment

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HCI

H₂S

H₂O

CO₂

The electronegativeities of F,Cl,Br and I are 4.0,3.0,2.8,2.5 respectively.Hydrogen halide with a high percentage of ionic character is

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HF

HCL

HBr

HI

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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 off affinity of B are high

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

When an electron is absorbed in an empty or partially filled orbital of an atom, the energy released is called

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Ionization energy

Potential energy

Electron affinity

Bond energy

The boiling point of heavy water is

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108°C

101.4°C

99°C

110°C

In a group the atomic size increase downward due to

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Addition of electronic shells

Increase in the proton number

Repulsion of electrons

All of the above

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

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HCl

HBr

HF

HI

Which of the following has zero depole-moment?

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CIF

PCl₃

SiF₄

CFCl₄

Hydrogen chloride molecule contains

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Covalent bond

Double bond

Co-ordinate bond

Electrovalent bond

The geometry of 4 sp³hybrid orbitals on an atom is

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Square planar

Tetrahedral

Trigonal planar

Linear

Which is made by coordinate covalent bond

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H₃O⁺

H₂O

CH₄

HCl

According to VSEPR theory, the shape of the water molecule is

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Octahedral

Distorted tetrahedral

Planar triangle

Linear

Tripple bond is present in

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O₂

H₂

N₂

Cl₂

Shielding effect intervening electrons causes

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Decreases in atomic radii in a period from right to left

Increase in atomic radii in a period from left to righ t

Decrease in atomic radii down the group

Increase in atomic radii down the group

Three sp²hybrid are co-planar at an angle of

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104.5°

109.5°

107°

120°

Which one of these is weakest?

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Ionest bond

Covalent bond

Metallic bond

Van der Waal's forces

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