Question # 1

In a group, the atomic radii from top to bottom

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increase

decrease

don't change

show variable trend

Bonding in MgO is an example of

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lonic bond

Polar bond

Covalent bond

Coordination covalent bond

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

The elements for which the value of ionization energy is low can

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Gain electrons readily

Lose electron less readily

Gain electrons with difficulty

Lose electron readily

Which one of the followings has polar covalent bonds hut is overall nom-polar molecule:

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HF

CO₂

CH₄

N₂

Low IE is a symbol of

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high electronegativity

small size

High electron affinity

Metallic character

Which one is a non-polar compound?

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SnCl2

PH3

Gecl4

H2O

At compromise distance the forces dominating between atoms are

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repulsive forces

attractive forces

Dipole induced dipole force

H-bonding

Covalent bonds are

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directional

Bidirectional

Multidirectional

Non directional

In a period the atomic radii

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increase

decrease

remain same

first increase, then decreased

What will be the shape of a molecule which containstwo sigma bond pairs and one lone pair?

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Linear

V shape

Tetragonal

Triangular

H3O+ can't accept a Ip because

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it has positive charge

The central atom is not electron deficient

The shell of oxygen has reached its limit

it already has a coordinate bond

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

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

Carbon-Carbon double bond length in C3H6

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154 pm

134 pm

120 pm

105 pm

Elements having high ionization potential values are

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metals

non- metal

liquids

solid

Polarity of a molecule is expressed in terms of

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Bond strength

Dipole moment

Bond length

Shape

What is true for a molecule with standard geometry

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It lacks a Ip

It can't be a donor

It can be an acceptor

All

The ionization energy

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generally increases from left to right in a period

increases from top to bottom in a group

does not change in a period

does not change in a group

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