Question # 1

According to SHAB, Lewis acid are divided into.

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Two classes

Three classes

Four classes

None of above

O2 molecule is.

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Fermagnetic

Forromagnetic

Paramagnetic

Diamagnetic

A mixture of weak acid and its salt is.

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Alkaline buffer

Acidic buffer

Neutral buffer

All of above

The contact process is mainly used when acid is required for the manufactures of.

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Explosives

Fine chemicals

Lead accumulators

All above

The formula of bleaching powder is.

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Ca OCl2

CaCIO3

Ca(CIO)3)2

CaOCI

Which of the following is not an alum.

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KAI (SO4)3 12 H2O

NaAI (SO4)2 12 H2O

NH4Fe (SO4)2 12H2O

FeAl (SO4)2 . 12 H2O

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

Which of the following compound does not following octet rule.

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CS2

PBr3

IBr

Br F3

The concept is also known as proton donor acceptor system.

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Bronsted Lowery

Lewis

Lux Flood

Usanovich

Which is not an ore of aluminium.

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Baxuite

Cryolite

Monazite

Corundum

The concept of telluric helisx was developed by

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Lother meyer

A.E. de Chancourtois

New lands

Doberieiner

Which of the following compounds is electrovalent in nature.

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SO2

ICI

KBr

CHI3

In German Silver copper is alloyed with which metal.

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Zn

Ni

Ai

Zn and Ni

The common oxidation state of lanthanides is.

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+3

+2

+1

+4

Which of the following statements is wrong.

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Covenant compounds are generally soluble is polar solvents.

Covalent compounds have low melting and boiling points

Lower than that of separate H atoms

Sometimes lower and sometimes higher than that of separate H

Which is the purest form of iron.

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Pig iron

Cast iron

Wrought iron

Steel

To increase the life of filament and to low the heat conductivity a mixture in filled in electric bulb.

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Ar & N2

Ar & Kr

Kr & N2

Xe & N2

Among all halogens no oxyacid of the following is known

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F

Cl

Br

I

Which of the following is an example of super octet molecules.

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C1F3

IF7

PCl5

All the three

Which of the following pentahalides is not formed.

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NF5

PF5

AsF5

BiF5

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

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