Question # 1

The no. of Ip's on oxygen in CO are

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1

3

4

2

The shielding effect of inner electron is responsible for

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Having no effect on ionization energy

Decreasing ionization energy

Increasing ionization energy

Increasing electronegativity

Among the following molecules, which one has coordinate covalent (dative) bond?

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CCI4

CO2

CO

CH4

Elements having high ionization potential values are

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metals

non- metal

liquids

solid

what is the exact value of angle in BF3

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90

104.51

119.5

120°

In a period the atomic radii

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increase

decrease

remain same

first increase, then decreased

The ionization energy of hydrogen atom is

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Zero

131.3kJmole

13.13kJ/mole

1313kJ/mole

Polarity of a molecule is expressed in terms of

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Bond strength

Dipole moment

Bond length

Shape

Low IE is a symbol of

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high electronegativity

small size

High electron affinity

Metallic character

Covalent bonds are

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directional

Bidirectional

Multidirectional

Non directional

Which one of the following has zero dipole moment

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NH3

CHCI3

H2O

BF3

Carbon-Carbon double bond length in C3H6

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154 pm

134 pm

120 pm

105 pm

Bond will be covalent when electronegativity difference of bonded atom is

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Equal to 1.7

between 0.5 to l.7

Greater to 1.7

zero

What is not true for NH4CI

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It has ionic bond

It has covalent bond

It has coordinate bond

It has hydrogen bond

In a group, the atomic radii from top to bottom

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increase

decrease

don't change

show variable trend

A molecule which contains two lone pairs and two bond pairs of electrons in valence shell of central atom, geometrical shape of molecules will be

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Tetrahedral

Trigonal pyramidal

Angular

Linear

Which of the following molecule has zero dipole moment?

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PCI3

BF3

NH3

H2O

Energy of atom in compound is

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Higher than individual atom

Lower than individual atom

equal to individual atom

Impossible to predict

At compromise distance the forces dominating between atoms are

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repulsive forces

attractive forces

Dipole induced dipole force

H-bonding

Bonding in MgO is an example of

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lonic bond

Polar bond

Covalent bond

Coordination covalent bond

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