Question # 1

Which isotope of hydrogen is radioactive in nature.

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Protium and deuterium

Tritium only

Tritium and deuterium

Only deuterium

Which one of the following is not correct.

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Ar is used in electric bulbs

Kr is obtained during radioactive decay

Boiling point of H2 is lowest among all noble gases.

Xe forms Xe OF4

The correct order of thermal stabilities of hydriedes of group 15 is.

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NH3 > PH3 > AsH3 > BiH3> SbH3

NH3 > PH3 >AsH3 > SbH3> BiH3

NH3 < PH3 < SbH3 > AsH3 > BiH3

BiH3 > Sb H3 > AsH3 > PH3 > NH3

On industrial scale chlorine is prepared by

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Dennis method

Deacon's process

Plantner's process

Aludels process

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 are not considered member of d-block elements.

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Zn

Cd

Hg

All above

Which element out of the following can ehibit a maximum con valency of seven.

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Chlorine

Sulphur

Fluorine

both Cl and F

Which is incorrect statement for Xe F2.

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It has linear structure.

It is hydrolyzed rapidly in aqueous solution of a base

It oxidizes Cl and I to Cl2 and I 2 respectively

It cannot act as F donor

Example of intra molecular hydrogen bonding.

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O-nitrophenol

O-hydroxy benzaldehyde

O- hydroxy benzoic acid

All of the above

Which of the following bonds will be non polar.

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N - H

O - H

C - H

C l - Cl

Arrange the hydrides of group 15 in the correct order of reducing nature.

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NH3 < PH3 < AsH3 < Sb H3 < BiH3

NH3 > PH3 >AsH3 >Sb H3 > BiH3

PH3 < AsH3 < SbH3 < BiH3 < NH3

PH3 > AsH3 > SbH3 > BiH3 > NH3

Sodium react more vigorously than lithium because.

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It is a metal

It has higher atomic mass

It is more electronegative

It is more electropositive

"Acids are substance whose aqueous solutions turned blue litmus red and tasted sour" stated by

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Davy

Liebig

Boyle

Rouelle

The formula of sulphur sesquioxide

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SO4

S2O7

S2O3

SO3

Zero group elements are called as

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Inert gases

Rare gases

Noble gases

All of above

Bases and reducing agents are electron giving agents and also called as.

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Electrodotic

Electrophile

Nucleophile

None of above

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

AI Cl3 acts as a strong Lewis acid, because it is.

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A covalent compound

Readily hydrolyzed

Electron deficient

An ionic compound

Which of the following is the strongest oxidant.

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F2

Cl2

br2

I2

Oxides ores of Aluminium

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Corundum

Bauxite

Diaspore

All above

H2SO4 is manufactured by

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The lead chamber process

The contact process

Both A and B

The Ostwald's process

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