Question # 1

The formula of Bauxite is.

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Al2O3

Al2 O3. 2H2O

AL2O3, H2O

Na3AIF6

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

Among the elements of third period, the element with lowest boiling point belongs to group.

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1

14

16

18

Bond angle is minimum in

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H2O

CO2

NH3

CH4

The compound insoluble in acetic acid is.

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Calcium oxide

Calcium carbonate

Calcium oxalate

Calcium hydroxide

Which metal burns in air at high temperature with the evolution of much heat.

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Cu

Hg

Pb

Al

Glass electrode cannot be used to measure the pH of pure.

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Acetic acid

Ethyl alcohol

Gelatin

All above

The concept is also known as electron pair donor acceptor system.

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Bronsted Lowery

Lewis

Lux -Flood

Usanovich

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

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

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22%

18%

14%

10%

Among sodium phosphate, sodium sulphate and sodium chloride the solubility in water increases as.

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Chloride > Phosphate > Sulphate

Sulphate > Pohosphate> Chloride

Chloride > Sulphate > Phosphate

Phosphate > Chloride > Sulphate

Ferrochrum contains Cr up to

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60-70%

70-80%

80-90%

40-50%

When a lead a storage battery is discharged .

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SO2 is evolved

PbS is consumed

Pb is formed

H2SO4 is consumed

The electronegativity of the following elements increases in the order.

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C,N, Si, P

N, Si, C,P

Si, P, C, N

P, Si, N, C

Strength of H bond in inter mediate between

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Van der Waals forces and covalent bond

Ionic and covalent bond

Ionic and metallic bond

Metallic and covalent

The aluminium alloy used to make parts of aircrafts is.

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Magnalium

Aluminium bronze

Duralumin

All of the these

Helium is used for

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The preservation of food

Filling electrical transformer

Pressuring agent in rockets

All of above

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

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Na

K

Mg

Ca

The types of coordinate compounds.

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Labila

Inert

Both A and B

None of above

In B2H6 molecule

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There exists a direct B-B a -bond

All the atoms are in one plane

All the B-H bonds are normal covalent bonds

There exist two bonds between the boron atoms.

In extraction of iron, the furnace charge consists of iron ore, coke and limestone. The function of limestone is to act as.

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An oxidation agent

A reducing agent

Flux

Slag

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