Question # 1

What % if nickel is present in the major ore Pentlandite.

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22%

18%

14%

10%

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 of the following hydroxides is most stable.

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Mg (OH)2

Ca(OH)2

Sr (OH)2

Ba (OH)2

The green colour of glass is due to the presence of.

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Chromium (III)

Cobalt (II)

Mn (IV)

Iron(III)

Which of the following process is involved in the purification of crude metals.

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Liquation process

Oxidation process

Distillation process

Electro refining

The bond formed by complete transfer of electrons from electropositive to more electronegative atom is called.

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Ionic bond

Covalent bond

Mettalic bond

Co ordinates bond

Are used as water repellents

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Carbides

Silicon

Silicones

Silicates

Group IV A consist elements.

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3

4

5

6

During the last two centuries, the atmospheric CO2 contents are increased by

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15%

25%

35%

50%

Both the elements shows allotropy

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B & Ai

B & Si

Al & Si

Any of above

Solid sodium chloride does not conduct electricity be cause.

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In solid NaCl, no ions are present

Solid NaCl is covalent in nature

In solid NaCl, there is no mobility of ions

In solid NaCl, there are no electrons.

Which one of following is non polar

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CH2Cl2

CCl4

CHCl3

CH3Cl

Which of the following is not correct.

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Rusting of iron can be stopped by increasing the concentration of CO2 in water

Rusting of iron is electrochemical in nature.

Rusting of iron takes place in moist air

Rusting of iron produces hydrated iron (III) oxide

Which of the following has maximum number of unpaired electrons.

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Fe3+

Fe2+

Co2+

CO3+

The process requirieng the absorption of energy of.

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F = F

Cl = Cl

H = H

O = O

The geometry of the molecule is primarily decided by

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Bond pairs around the central atom

No of k bond around the central atom

No of bond pairs as well as lone pairs around the central atom

No. of lone pairs on central atom

The metallic character of group 14 elements

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Decreases from top to bottom

Increases from top to bottom

Does not change gradully

Has no significance

Beryllium shows diagonal relationship with.

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Mg

Al

Na

B

Which of the elements of group II A has the highest value of IE.

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Mg

Be

Ca

Sr

Magnalium is alloy of Aluminium which is used in

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Scientific apparatus

Aircraft parts

Rail road care

Boat machinery

Which one of the following statements if false with respect to CFT.

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In an octahederal crystal field. the d electron on a metal ion occupy the ex of orbitals before they occupy the t98 not of orbitals.

Diamagnetic metal ions cannot have an odd number of electrons

Low spin complexes can be paramagnetic

Low spin complexes contain strong field ligands.

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