Question # 1

Stable metal ions strictures are.

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Noble gas structure

Is electron group structure

Transition metal in structure

All of the above

The purification of Bauxite can be carried out.

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Baeyer's process

Hall's process

Serpek's process

Any of above

Fluorine does not show variable oxidation state because of.

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its high electronegativity

Its small sixe

low dissociation energy of F-F bond

Non availability of d-orbitals

Which of the following is not an ore of Cr.

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Chrome iron

Nicollite

Crocisite

Chrome ochre

Strongest inter molecular hydrogen bond is formed in

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H2O

NH3

HF

H2S

Sodium silicate is used

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In the paint industry

For fixing labels to glass

In a soap industry

All above

The colour imparted by lithium to the flame is.

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Golden yellow

Grasay green

Violet

Red

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.

Which of the following represents the correct order of ionic radii

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La+ < Na+ < K+ < Rb+

Li+ > Na + > K+ >Rb+

Li = Na + = K+ = Rb+

Rb +> Na+> K+ > Li+

In diborane (B2H6)

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The structure is similar to that of C2H6

All the atoms are in one plane

The born atoms are linked through hydrogen bridges

There is a direct boron boron bond

The major role of Flurospar which is added in small quantities in the electrolytic reduction alumina dissolved in fused cryolite is.

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As a catalyst

To make the fused mixture very conducting

To lower the temperature of the melt

To decreases the rate of oxidation of carbon at the anode

Which of the following reactions is employed to produce ozone in the laboratory.

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Exposure of air to UV light

Reaction of F2 with H2O at low temperature

Reaction SO2 with H2O2

Passage of silent electric discharge through oxygen

Urea is fertilizer

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Nitrogen fertilizer

Potash fertilizer

Phosphorous fertilizer

Complete fertilizer

Pauling has suggested that the calculate of energy can be improved by considering.

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Screening effect

Polarization effect

Both A and B

None of abvoe

Group VA of the periodic table consist of elements.

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3

4

5

6

Phosphoric acid is the most important of the phosphorus oxy acids. Industrially phosphoric acid is prepared by.

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The Ostwald process

The Haber's process

The reaction of phosphate rock with sulphuric acid

The reaction P4O10 with water.

Solid substances consist of an ordered any of ions and solid as a whole is electrically.

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Conductor

Neurtal

Acidic

Basic

Group VII A of periodic table consist of elements.

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4

5

6

7

Which of the following species has highest bond energy.

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H2

T2

D

Cl

A boy accidently splashes a few drops of conc. H2SO4 on his cotton shirt. A few minutes later, the splashed part blacken and holes appear.This is because the sulphuric acid.

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Heats up the cotton so that it burns

Dehydrates the cotton

Causes cotton to react with oxygen of the air

Removes the elements of water from cotton

Molecule is a diatomic

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Nitrogen

Phosphorous

Arsenic

Antimony

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