Question # 1

Which of the following molecules has a co-ordinate covalent bond

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NH₄CI

NaCI

HCI

AICI₃

Which of the following molecules have highest bond energy

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F2

Cl2

Br2

I2

Which compound does not obey the octet rule.

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NH3

BCl3

H2O

CH4

Fluorine molecule (F₂) is formed by the overlap of

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s - s orbital

s - p orbital

p - p head on overlapping of orbitals

p - p parallel overlapping of orbitals

Suppose a new element 'J' has discovered and has seven electron in the valence shell. Which statement about this element would be correct.

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It is monatomic

It form covalent bond with hydrogen

It forms stable positive ion

It forms covalent bond with group IA element

Dipole moment is defined as.

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Charge x distance

Charge x Debye

Charge x displacement

Charge x bond energy

In a group of periodic table, ionization energy.

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Decreases

Increases

Remains same

First increases than increases

Along period of periodic table shielding effects.

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Increases

Decreases

Remain constant

First increases than decreases

The shape of H₃O is

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Tetrahedral

Angular

Trigonal planer

Pyramidaj

Those elements whose electronegativities are 1.2 and 3.2, react to form

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Ionic bond

Covalent bond

Gaseous substance

Definiting a liquid substance

In which of the following Paris, do the elements form a compound by sharing electrons.

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carbon and chlorine

Lithium and iodine

Neon and oxygen

Potassium ad bromine

Forces of attraction between He atoms are.

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Hydrogen bonding

London forces

Debye forces

Ion dipole forces

The bond angle in NH3 molecule is

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109.5^o

107.5^o

104.5^o

106^o

Which one of the following has no tendency of form coordinate covalent bond with H+

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NH3

H2O

CH4

CH3OH

In BeCl2, the covalent bond is formed due to overlap of

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sp -s

sp -p

sp2 -p

sp3 -p

SP^3-hybridization in important in describing the bonding in

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Which of the following molecules contain six bonding electrons.

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CH4

CO2

BF3

H2S

If we want to change O₂to O₂^-1The electron is to be placed in

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