Question # 1

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

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Fluorine

Chlorine

Bromine

Iodine

The _________ sphere is enclosed in brackets in formulas for complex species, and it includes the central metal ion plus the coordinated group

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Ligand

Donor

Coordination

Oxiation

Finely divided iron combines with CO to give.

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Fe(CO)5

Fe2(CO)9

Fe(CO)12

Fe(CO)6

Which of the following statements regarding covalent bond is false.

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The electrons are shared between atoms.

The bond in non -directional

The strength of the bond depend upon the extent of overlapping

The bond formed may be polar or non-polar

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

The process of extracting a metal in pure form its ores is known as.

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Crushing

Grinding

Dressing

Metallurgy

In XeF2 molecules, Xe atom undergoes hybridization

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spd

sp2

sp3

sp3d

Which of the following bonds will be non polar.

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N - H

O - H

C - H

C l - Cl

HCIO2 gives the structure of a.

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Linear

Angular

trigonal pyramidal

Tetra hddral

Blue color of glass of due to the presence of .

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Cobalt (II)

Chromium (III)

Iron (III)

copper (II)

The following oxo acids have been arranged in the order decreasir acid strength identify the correct order.

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III > IV > II > I

III > II > I >IV

I > II >III > IV

IV > III > II > I

The electronic configuration of sodium (Z=11)

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1s2, 2s2, 2p4

1s2, 2s2, 2p6, 3s2 , 2p5

1s2, 2s2, 2p6, 3s1

1s2, 2s2, 2p6, 3s2

A general trend in the properties of elements of carbon family shows that with increase in atomic number.

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The tendency towards concatenation increases

The tendency to show +2 oxidation state increase

Metallic character decreases

The tendency to form complexes with convalency higher than four decreases.

The element with atomic numebr greater than 100 are known as

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Trans uranium elements

Trans fermium elements

Actinides

Lanthanides

A stable molecule is a group of atoms held together by

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Chemical forces

Physical forces

Valence force

None of above

Which one of the following statement is incorrect in relation to ionization enthalpy.

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Ionization enthalpy increase for each successive electron

The greatest increase in ionization enthaly is experienced on removal of electron from core noble gas configuration

End of the valence electron is marked by a big jump in ionization enthalpy

Removal of electron from orbitals bearing lower value to easier than from orbital having highest n value.

Coordination compound show

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Structural isomerism

Stereo isomerism

Both A and B

None of above

Lother Meyer plotted a graph showing variation of.

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Atomic volume with increase in atomic number

Atomic volume with increase in atomic weight

Atomic redii with increase in atomic weight.

Atomic weight which increase in atomic number

Which of the following hydroxides is most stable.

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Mg (OH)2

Ca(OH)2

Sr (OH)2

Ba (OH)2

In the Lewis formula of which of the following species, the number of single double and dative bonds are equal.

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N2O3

HNO3

SO2

SOCl2

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

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