Question # 1

Which of the following is planar?

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CH2Cl2

CHCl3

CCl4

C2H2

The increase in boiling points of noble gases from He to Xe is due to the

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Decreases in ionization energy

Increases in polarizability

Increase in electron affinity

Increase in atomic volume

The correct order of electron affinities is.

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C > Si, > Na > Ar

Si > Cl > Na > Ar

C > Na > Si > Ar

C > Si > Ar > Na

Which of the following configuration of an ionic species represents psedue noble gas configuration.

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ns2

ns2 np6

ns2 np6 nd 10

ns2 np3

Sulphate ores of aluminium

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Alumite

Cryolite

Fekdsper

Kaolin

Which of the following element has six electrons in the valance shell but cannot exhibit a maximum co valency of six.

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Sulpher

Oxygen

Salenium

Both A and B

The alkali metal with highest melting point is

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K

Na

Li

Ca

Bromine is soluble in

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Alcohol

Water

Chloroform

All above

Berllium has diagonal relationship with

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Li

Al

B

Na

Which of the following has the greatest metallic character.

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Na

Mg

Al

Si

The silicate chains are present in

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Silica

asbestos

Beryl

Clays

In which of the following species the bonds are non directional.

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NCl3

RbCl

BeCl2

BCl3

Which number of halogen family does not show positive oxidation state.

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Fluorine

Chlorine

Bromine

Iodine

The correct order of second ionization potential of carbon , nitrogen, oxygen and fluorine is.

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C > N > O > F

O > N > F > C

O > F > N > C

F > O > N > C

The electromagevitiy of the following elements increase in the order

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F > Cl > O > S

S > Cl > O > F

F > O > N > C

C > O > N > F

Which of the following does not apply to metallic bond.

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Overlapping valence orbitals

Mobile valency electron

Delocalized electrons

Highly directed bonds

The inert gasses AR, Ka, and Xe form solid compounds with certain organic molecules under pressure..

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Halides

Hydrates

Clathrates

All of above

The strongest acid is.

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HNO2

HNO3

H2N2O2

HNOS

To increase the life of filament and to low the heat conductivity a mixture in filled in electric bulb.

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Ar & N2

Ar & Kr

Kr & N2

Xe & N2

Electron gas theory fails to explain

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Specific heat of metals

Electrical and thermal conductivity

Paramagnetic behavior of metals

All of the above

Which of the following elements has the highest value of IE.

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Na

K

Mg

Ca

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