Question # 1

The boiling point of water is

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O ^oC

100 ^oC

35 ^oC

25 ^oC

A covalent bond formed by the mutual sharing of two pairs of electrons between bonded atoms is called.

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Signle covalent bond

Double covalent bond

Triple covalent bond

Polar covalent bond

Whcih one of the following in as electron deficient molecule.

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NH3

O2

BF3

N2

Metal have the tendency to lose elecrons due to.

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High ionization energies

Low ionization energies

Low electron affinity

None of the above

Noble gases are non -reactive, because they do not.

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Gain electrons

Lose electrons

Share electrons

All of these

All the noble gases have their valence electrons.

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Incomplete

Partialy filled

Completely filled

None of the above

Whcih types of bond is present between NH3 and BF3

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Covalend Bond

Ionic Bond

Co ordinate covalent bond

Metallic Bond

Covalent Bond involves the

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Sharing of electrons

Repulsion of electrons

Acceptance of electrons

Donation of electrons

Number of electronsin nitrogen molecule is.

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2

4

6

8

Keeping in view the intermolecular forces of attraction, indicate which compound has the highest boiling point

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H₂S

HF

NH₃

H₂O

When an electronegative element combines with electrpositive element, the type of bonding. is.

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Covalent

Polar Covalent

Ionic

Coorinae Covalent

Which types of attractive forces are presentin ionic compounds.

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Covalent bonds

Electrostatic forces of attraction

Mtallic bonds

Coordinate covalent bonds

Ionic compund have

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Low melting and high boiling points

Low melting and boiling point

High melting and boiling points

High meilting and low boiling points

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