Question # 1

Three sp²hybrid are co-planar at an angle of

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104.5°

109.5°

107°

120°

The electronegativity of elements in a period from left to right

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Decreases

Increases

First decreases then increases

First increases then decreases

SnCI₂have ______ shape

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Planner

Tetrahedral

Angular

None

According to VSEPR theory, the shape of the water molecule is

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Octahedral

Distorted tetrahedral

Planar triangle

Linear

The electronegativeities of F,Cl,Br and I are 4.0,3.0,2.8,2.5 respectively.Hydrogen halide with a high percentage of ionic character is

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HF

HCL

HBr

HI

An ionic compound M₂S₃is formed by the metal M,, the metal is

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Ca

Ba

K

Al

From the difference between expected bond energies for the normal covalent bond and experimentally determined values Pauling calculated the values of

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Ionization potential of elements

Electron affinity of elements

Electronegativity of elements

Bond length

The driving force for making a bond is

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To attain noble gas electronic configuration

To make soled compounds

To make different compounds

To make gaseous substances

Which one of these is weakest?

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Ionest bond

Covalent bond

Metallic bond

Van der Waal's forces

H-bonding is not present in

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Glycerine

Water

Hydrogen sulphide

Hydrogen fluride

One of the following bonds is polar but compound is non-polar

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H₂O

NH₃

HCl

CO₂

The shape of gaseous SnCl₂is

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Tetrahedral

Linear

Angular

T-shaped

Which of the following has highest bond order

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Ionic radius, in a period from left to right

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Increases

Decreases

Decreases then increases

Increases and decreases

Two H-atom combine to form a strong H₂molecule due to

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Increase in potential energy

Decrease in potential energy

Energy remains unchanged

Distance is increased

Inter molecular forces in solid hydrogen are

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Covalent forces

Van der Waal forces or London dispersion forces

Hydrogen bonds

All of these

In which of the following theories the hybridizationis considered

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Vsepr

Lewis

Molecule orbital

Valence bond

Shielding effect intervening electrons causes

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Decreases in atomic radii in a period from right to left

Increase in atomic radii in a period from left to righ t

Decrease in atomic radii down the group

Increase in atomic radii down the group

Fluorine molecule is formed by

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The axial p-p overlap

The sidewise p-p overlap

The axial s-p overlap

The overlap of two sp²hybrid orbitals

Size of an anion is increased as compared to its atom because of the

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Addition of new shell

Repulsion of electrons in the valence shell

Decrease in nuclear charge

Increase in the unclear charge

Molecular orbital picture of N₂indicates

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One unpaired electron

Two unpaired electron

No unpaired electron

None of these

Which for the following has no dipole moment

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HCI

H₂S

H₂O

CO₂

Which of the following geometry is associated with the compound in which the central atom assumes sp³d hybridization?

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Planar

Pyramidal

Angular

Trigonal bipyramidal

Shape of CIO₃is

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Triangular pyramidal

Tetrahedral

Triangular planar

Triangular bipyramidal

Ca, Mg, Be, Ba, belong to the same group, the order of their ionization energy values is

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Be > Mg> Ca > Ba

Ba > Ca > Mg > Be

Ca > Mg > Be > Ba

Ba > Mg > Ca > Be

Generally the bond formed by metals with non-metals is

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Ionic

Covalent

Polar

Non- polar

The bond order O₂molecule is

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1

2

3

Zero

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