Question # 1

The electron affinity of chlorine may be represented by the equation

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SnCI₂have ______ shape

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Planner

Tetrahedral

Angular

None

Nitrogen in NH₃is sp³hybridized but the bond angle in NH₃is 107° and not 109.5° due to

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sp³orbital planar

sp³orbital trigonal

Repulsion between lone pair and bonded pairs

None of them

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

The degree of polarity of molecule is known as its

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Dipole moment

Moment arm

Bond energy

Ionic character

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

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H₂O

NH₃

HCl

CO₂

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Excitantion of an electron from 2s to 2p-orbital

Transfer of three electrons from B to the other atoms

Excitation of two electrons form 2s orbital to 2p orbital

Formation of molecular ion

According to MO Theory, the species O₂+ possesses

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bond order of 2.5

three unpaired

diamagnetic character

stability lower then O₂

In H₂O molecule the bond angle is

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90°

109.5°

107°

104.5°

The covalent bonds are

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Unidirectional

Bi-directional

Non-directional

Multi-directional

When elements of group I react with the elements of group VIA theory form

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Ionic bond

Covalent bond

Polar bond

None

The bond angles in methane CH₄are equal to

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109.5°

107.5°

104.5°

120°

Among the alkaline earth metals the element forming predominantly covalent compounds is

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Be

Mg

Sr

calcium

All covalent bonds formed between the two atoms are non-polar when

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Covalent bond between two non-metal atoms

Covalent bond between metal and non-metal

Covalent bond between two atoms of same element

Covalent bond between metal atoms

Hydrogen chloride molecule contains

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Covalent bond

Double bond

Co-ordinate bond

Electrovalent bond

The bond order O₂molecule is

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1

2

3

Zero

N-atom forms three covalent bonds, its electronic configuration is

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Atoms obey octet rule by sharing-electrons making covalent bonds according to

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Lewis and Kossal theory

Valance bond theory

VSEPR theory

Molecular orbital theory

Which of the following is a polar molecules

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Carbon dioxide

Carbon tetrachloride

Methanol

Ethane

The geometry of 4 sp³hybrid orbitals on an atom is

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Square planar

Tetrahedral

Trigonal planar

Linear

Which of the following has zero depole-moment?

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CIF

PCl₃

SiF₄

CFCl₄

In sp²hybridization bond angle is _____

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120°

180°

109.5°

None

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The ionization energy of A is high and electron affinity of B is low

The ionization energy of A is low and electron affinity of B is high

Both the ionization energy of A and electron off affinity of B are high

Both the ionization energy of A and electron affinity of B are low

Covalent compounds are soluble in

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Polar solvents

Non-polar solvents

Concentrated acids

All solvents

Which one of these is weakest?

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Ionest bond

Covalent bond

Metallic bond

Van der Waal's forces

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

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

The bond angle H - O - H in ice ins closest to

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120° , 28^'

60°

90°

109°

Molecular orbital picture of N₂indicates

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One unpaired electron

Two unpaired electron

No unpaired electron

None of these

The bond order in No is 2.5 while that in NO⁺is 3.Which of the following statements is true for these two species?

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Bond length in NO⁺is greater than in NO

Bond length in unpredictable

Bond length in NO⁺is equal to that in NO

Bond length in NO is greater than in NO⁺

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