Question # 1

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

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CCI4

CO2

CO

CH4

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 no. of Ip's on oxygen in CO are

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1

3

4

2

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

Which one of the following has zero dipole moment

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NH3

CHCI3

H2O

BF3

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

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

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

A covalent bond may be

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100% covalent

Partial ionic

100% ionic

Both a and b

Polarity of a molecule is expressed in terms of

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Bond strength

Dipole moment

Bond length

Shape

In a group, the atomic radii from top to bottom

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increase

decrease

don't change

show variable trend

Octet rule is not allowed in the formation of

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NF3

B.CF4

CCI4

PCI5

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

At compromise distance the forces dominating between atoms are

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repulsive forces

attractive forces

Dipole induced dipole force

H-bonding

Greater shielding effect corresponds to ionization potential value

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greater

lesser

remain same

no effect

Bonding in MgO is an example of

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lonic bond

Polar bond

Covalent bond

Coordination covalent bond

The ionization energy of hydrogen atom is

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Zero

131.3kJmole

13.13kJ/mole

1313kJ/mole

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

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8

9

12

10

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