Question # 1

A molecule that has polar bonds but is overall non - polar

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IF

CCl4

PCI3

All

Geometry of simple molecule with sp2 hybridization

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Triangular planar

Trigonal

Square planner

Pyramidal

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

In a period the atomic radii

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increase

decrease

remain same

first increase, then decreased

Mostly ionic compounds are produced between elements of group

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IA and IIA

IB and VIB

IA. IIA and VII-A

IA and IB

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

Elements of group IA and IIA are

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electronegative

neutral

electropositive

non-metals

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

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HF

CO₂

CH₄

N₂

In a group, the atomic radii from top to bottom

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increase

decrease

don't change

show variable trend

pi-bond can be formed by sideways overlap of

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s-orbital

d-orbital

p-orbital

sp orbital

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

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CCI4

CO2

CO

CH4

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

Total number of valence electrons in phosphonium ion (PH4-) is

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8

9

12

10

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

Which one is a non-polar compound?

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SnCl2

PH3

Gecl4

H2O

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

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

Energy required to remove electron from an atom

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Ionization potential

Electronegativity

Electropositivity

Electron affinity

For formation of ionic bond, electronegativity difference should be

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Equal to zero

Equal to 0.5

More then 1.7

Less than 1.7

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