Question # 1

When molten copper and olten zinc are mixed together , they give rise to a new substnce called brass. Predict what type of bond is formed between copper and zinc.

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Ionic bond

Coordinate Covalent bond

Metallic bond

Covalent Bond

All the noble gases have their valence electrons.

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Incomplete

Partialy filled

Completely filled

None of the above

A bond pair is covalent molecules usually has.

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One electron

Two electron

Three electron

Four electron

How many electron are there in the valence shell of sodium atom.

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One

Two

Three

Four

In the formation of AlF₃, aluminum atom loses........electrons.

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1

4

3

2

Triple covalent bond involves how many electrons.

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Six

Four

Eight

Three

How many lone pairs are present on nitogenin ammonia molecule.

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One

Two

Three

Four

Why is H₂Oa liquid while H₂S is a gas?

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Becuase in waer, the atomic size of oxygen in smaller than that of Sulphur

Because water can easily freeze into ice

Because water is a polar compound ad tere exists strong forces of attrction betwene its molecules

Because H₂O molecule is lighter than H₂S

The electropositive elements have the tendency to

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Lose electrons

Gain electrons

Share electrons

All of these

The fore of attraction betwene water molecule is.

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Ionic bonding

Covalent bonding

Hydrgen Bonding

Co ordinate Covalent bonding

Covalent Bond involves the

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Sharing of electrons

Repulsion of electrons

Acceptance of electrons

Donation of electrons

Which among of the followign has a double covalent bond.

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Ethane

Methane

Acetylene

Ethylene

A covalent bond formed by two similar stoms is known as.

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Polar Covalent bond

Metallic bond

Double covalent bond

Non-polar covalent bond

Which metal has the lowest melting point?

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Li

Na

Rb

K

The compund formed by oppoite charges are known as.

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Metallic solids

Ionic compounds

Non-polar Covalent compound

None of the above

Malleability is the property by virtue of which a metal can be drawn into.

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Rods

Plates

Sheets

Wires

The formaton ionic bond between two ions is due to.

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Hydrogen bonding

Metalic force

Electrostatic forces

All of the above

Whcih one of the following is the weakest force among the atoms.

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Intermolecular force

Ionic force

Metallic force

Covelent forces

Atoms react with each other because.

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they are attracted towards each other

They are short of electrons

They want to disperse

They want attain stability

An atom having six electonsin its valence shell will achieve noble gas electronic confguration by

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Gainign one electron

Gaining two electrons

Losing all electrons

Losing two electrons

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