Question # 1

In graph of atomic volume versus atomic weight the elements corresponding to peaks in the curve belong to.

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Group 1

Group 18

Group 4

Group 14

Is an instate able colourles gas with a sticky sweet odor and is extremely toxic.

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B2 H6

B4 H10

B3 H9

B6 H10

All the member of group III A are metals except.

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B

Ai

Ga

In

For the respiration of sea divers mixture is used.

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He & O2

Ar & O2

Ne & O2

Kr & O2

Graphite is a good conductor of electricity because is.

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Has sp2 hybridized carbon stoms

Has free electrons

Is crystalline

Has free atoms

The polarity of bonds can lead to polarity of molecules and affect

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Melting point

Boiling point

Solubility

All of above

Which is not an ore of aluminium.

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Baxuite

Cryolite

Monazite

Corundum

The purification of Bauxite can be carried out.

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Baeyer's process

Hall's process

Serpek's process

Any of above

Which property is not exhibited by carbon in its compounds.

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Forming bounds to other carbon atoms

Formation multiple forms

Exhibiting allotropic forms

Forming compounds with coordination number beyond four

Aluminium halides is.

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White crystalline solid

Hygroscopic

Sublimes at 180^oC

All above

Alums are generally used

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In Dying and water proofing of fabric

In arrest bleeding

IN water purification

All above

Which of the following trihalides of nitrogen behaves as the weakest base.

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NF3

NCl3

NBr3

NI3

The nature of bonds in compounds of carbon and silicon is mostly

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Covalent

Electrovalent

Metallic

Both A and B

In 1952 who popularized the use of CFT for inorganic chemist

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Bethe

Orge

Van Vleck

Werner

The bond along Sp2 hybridization is.

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180^o

120^o

109.5^o

160^o

What is the oxidation number of the central meal atom in the coordination compound.[Pt(NH#)#Cl]Cl

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-1

0

+2

+3

Which one of the following has a linear structure.

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H2O

CO2

NO2

SO2

Among LiCl, BeCl2, BCl3, and CCl4 the covalent bond character follows the order.

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LiCl < Becl2< Bcl3 < CCl4

LiCl > BeCl2 < BCl3<CCl4

LiCl< Becl2 < BCl3 < CCl4

LiCl > Becl2 > BCl3 < CCl4

Hypo is used in photography to.

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Reduce AgBr to metallic silver

Remove silver a silver salt

Remove undecomposed silver bromide as soluble complex

Remove reduced silver

The correct order of electron affinities of SI, P, and Cl is.

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P > Si > Cl

Cl > P > Si

Cl > Si, > P

Si > P . Cl

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

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Na

K

Mg

Ca

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