Question # 1

Which of the following elements has the highest ionization energy.

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Na

Si

Ar

Cl

The correct order of increasing polar character is.

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H2O < NHE < H2S < HF

H2S < NH3 < H2O < HF

NHE < H2O < HF < H2O

HF < H2O < NH3 < H2S

Oxidation state of the chromium [Cr(NH3)6]3+ complex ion is

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+2

+3

+4

+5

Separation of isotopes of uranium is carried out by

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CaF2

SF6

HF

All above

Bromine is soluble in

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Alcohol

Water

Chloroform

All above

B.P of heavy water is

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equal to that of ordinary water

greater than that of ordinary water

Less than that of ordinary water

equal to that of distilled water

The atomic and ionic radii value on moving from left to right in the sereis.

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Increase

Decrease

Does not change

None of above

Which of the following is not an ore of iron.

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Haematite

Magnetite

Siderite

Monazite

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

Formula of orthophosphoric acid

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H2PO4

H3PO2

H2P2O5

The total number of bond pairs around sulphur and total number of lone pairs around oxygen atoms in the Lewis structure of sulphate ion are respectively.

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4, 12

8,12

12,4

6 ,12

The state of hybridization of carbon in CO2 is

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sp2

sp

sp3

dsp2

An element with high electronegativity has

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High IE and high EA

High IE and low EA

Low IE and High EA

Low IE and low EA

Which of the following compounds would be most ionic to charcter.

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PbCl4

PbCl2

SnCl4

SnCl2

H2SO4 acts as gent

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Reducing

Oxidizing

Both A and B

None of above

Which process of adsorption of hydrogen on palladium is known as.

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Syneresis

Occlusion

Diffusion

Erosion

The most stable oxidation state of chromium is.

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+6

+3

+4

+2

The inert gases Ar, Kr and Ke form compounds with water at low temperature and high pressure. These compounds are called.

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Halides

Hydrates

Clathrates

All of above

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

Among group IA elements, melting point

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Increases down the group

Decreases down the group

Do not show any regular trend

Remains constant

The geometry of Xe F2 is

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Triangular planar

Square planar

Linear

Trigonal bipyramidal

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