Question # 1

Arrhenius concept explained

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Constant heat of neutralization

Quantitative determination of acid base strength

Catalytic property of acid

All above

Green houses are responsible for keeping our plant warm and sustaining life on the earth.

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CO2 & water vapours

CO2 & CFC

CO2 & H2O

CO2 & CH4

Which of the ionic possesses highest bond energy.

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C-C

Si -Si

Ge - Ge

Sn -Sn

Which of the following hydroxides has the maximum solubility in water.

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Mg (OH)2

Ca (OH)2

Sr (OH)2

Ba (OH)2

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

The energy gap between tag and eg sets in denoted by

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A-

10 Dq

Both A and B

None of above

Which of the following compounds combines with hemoglobin.

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CO2

CO

NO

N2

Which of the following is the strongest oxidant.

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F2

Cl2

br2

I2

Carbides because of their hardness are

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Ionic carbides

Interstitial carbides

covalent carbides

Any of above

For the respiration of sea divers mixture is used.

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He & O2

Ar & O2

Ne & O2

Kr & O2

Among the elements A,B,C and D having atomic numbers 9,10,11, and 12 respectively, the correct order of ionization energies is.

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A > B > C >D

B > A > D > C

B > A > C > D

D > C > B > A

Electronegativity of oxygen is.

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2,5

3,5

2,4

2.1

The purification of Bauxite can be carried out.

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Baeyer's process

Hall's process

Serpek's process

Any of above

An explosive

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Nitroglycerine

Trinitrotoluene

Fluorine perchlorate

All above

Pick out incorrect statemtn about K2r2O7

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It oxidizes acidified solution of H2S to S

It oxidizes Ki TO i2

It oxidizes HCl to Cl2

It gives oxygen, when treated with cold conc. H2SO4

Which one of the following elements shows the most stable oxidation state of +1

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AI

Ga

In

TI

In group theory the triple degenerate set is denoted by

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eg

t2g

e2g

tg

Metal are

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Hard

Ductile

Malleable

All

Which of the following statements about anhydrous aluminium chloride is correct.

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It exist as AlCl3 molecules

It is not easily hydrolysed

It sublimes at 100 ^oC under vacuum

Boron does not form B³⁺ ions

Which is not an ore of aluminium.

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Baxuite

Cryolite

Monazite

Corundum

Has maximum property of catenation.

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C

Si

Sn

Pb

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