Question # 1

In which of the following Paris, do the elements form a compound by sharing electrons.

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carbon and chlorine

Lithium and iodine

Neon and oxygen

Potassium ad bromine

Along period of periodic table shielding effects.

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Increases

Decreases

Remain constant

First increases than decreases

According to MOT, which molecular orbital has highest energy.

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sigma 1s

pi+ 2S

pi 2py

Pi+ 2px

If we want to change O₂to O₂^-1The electron is to be placed in

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Which molecules is 100% covalent

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H2

H2O

HF

NH3

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

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O2⁺²

N2^-2

B2

F2

The tendency of an tom to attract shared pair of electron towards itself is called its.

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Ionization energy

Electronegativity

Electron affinity

dipole moment

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 zero dipole moment

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NH₃

CHCI₃

H₂O

BF₃

In BeCl2, the covalent bond is formed due to overlap of

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sp -s

sp -p

sp2 -p

sp3 -p

Forces of attraction between He atoms are.

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Hydrogen bonding

London forces

Debye forces

Ion dipole forces

In methanol, bond between carbon and oxygen.

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Ionic

Non polar

Polar

Co - ordinate

How many sigma and pi bonds are present in C2H2.

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one sigma and two pi

two pi and one sigma

Two pi and three sigma

Three pi and two sigma

Fluorine molecule (F₂) is formed by the overlap of

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s - s orbital

s - p orbital

p - p head on overlapping of orbitals

p - p parallel overlapping of orbitals

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 molecule has sG2 hybridization.

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CH4

C2H4

C2H2

C2H5

SP^3-hybridization in important in describing the bonding in

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