Question # 1

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

Carbon-Carbon double bond length in C3H6

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154 pm

134 pm

120 pm

105 pm

lonic bond is produced after complete transfer of

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nucleus

neutrons

electrons

protons

Low IE is a symbol of

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high electronegativity

small size

High electron affinity

Metallic character

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

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CCI4

CO2

CO

CH4

Octet rule is not allowed in the formation of

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NF3

B.CF4

CCI4

PCI5

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

Energy required to remove electron from an atom

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Ionization potential

Electronegativity

Electropositivity

Electron affinity

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

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8

9

12

10

Elements having high ionization potential values are

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metals

non- metal

liquids

solid

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

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

pi-bond can be formed by sideways overlap of

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s-orbital

d-orbital

p-orbital

sp orbital

Which one of the following has zero dipole moment

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NH3

CHCI3

H2O

BF3

The ionization energy of hydrogen atom is

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Zero

131.3kJmole

13.13kJ/mole

1313kJ/mole

Bonding in MgO is an example of

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lonic bond

Polar bond

Covalent bond

Coordination covalent bond

what is the exact value of angle in BF3

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90

104.51

119.5

120°

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

Which of the following molecule has zero dipole moment?

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PCI3

BF3

NH3

H2O

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