Question # 1

Those elements whose electronegativities are 1.2 and 3.2, react to form

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Ionic bond

Covalent bond

Gaseous substance

Definiting a liquid substance

Which of the following is true for ionic compounds

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They are non-electrolytes in the molten state

They have bonds which are directional

They conduct electricity in solid state

They are generally more soluble in polar solvents than in non-polar solvents

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

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N2

O2

B2

F2

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

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O2

N2

B2

F2

What is bond order.

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Number of unpaired electrons

Number of paired electrons

Number of electrons present in antibonding molecular orbital

Number of bond formed between two atoms after overlap

VSEPR theory was proposed by

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Nyholn and Gillespie

Kossel

Lewis

Sidwick

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 of the following has linear structure.

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CO2

NH3

CH4

H2O

Which element has highest ionization potential

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Li

Na

K

Rb

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

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The bond angle in NH3 molecule is

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109.5^o

107.5^o

104.5^o

106^o

The nature of bond in diamond is

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Electrovalent

Metallic

Coordinate covalent

Covalent

The carbon atom is C2H4 is.

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sp3 hybridized

sG2 hybridized

Sp hybridized

dsG2 bybridized

Which of the following molecule has zero dipole moment.

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NH3

CHCl3

H2O

BF3

Which one of the following has the greater ionic characters in it.

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HF

HCl

H2O

H2

Bond energy depends upon

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Electronegativity

Size of atom

Bond length

All of these

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

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