Question # 1

The name hydrogen was proposed by.

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Lavoisier

Rutherford

Henry Cavandish

Scheele

The Ostwald process is the main method for the manufacture of nitric Acid in the fist step in this process is.

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Nitrogen and hydrogen react to form NH3

Ammonia is burned in O2 to generate N2 and H2O

Nitrogen and oxygen react to form NO2

Ammonia is burned with O2 to generate NO and H2O

The correct order of ionization energies of alkali metals is.

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Li > Na > K > Rb

Na > K > Rb > Li

Rb > K > Na > Li

Rb > K > Li > Na

The force responsible for dissolution of ionic compounds in water are

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Hydrogen bonds

Ion dipole forces

Ionic bonds

Van Der Waal forces

Magnalium is alloy of Aluminium which is used in

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Scientific apparatus

Aircraft parts

Rail road care

Boat machinery

Pick out incorrect statement.

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NF3 molecule has trigonal pyramidal structure.

It is practically incoluble in water and is only hydrolyzed, an electric spark is passed through a mixture with water vapour.

Dipole moment of NF3 is more than that of NH3

Nitrogn (III) oxide (N2O3) is an acidic oxide.

Acid rain effects

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Human being

Crops

Aquatic life

All above

The unit of sodium chloride structure is.

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Linear

Cubic

Tetrahedral

Square planner

iodine is used as a

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Photography

Manufacture of dyes

Analgesic

All above

In their ionic compounds halogens exhinit the oxidation states of.

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-1

-2

-3

-4

The Lewis structure of which of the following does not have coordinate bond.

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SO2

HNO3

H2SO4

HNO2

The H2SO4 obtained by the contact process having purity

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70%

74%

78%

82%

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

Dibornae is used

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Fro high energy fuel

For welding torches

as reducing agent

All above

The pH Value 4.2 is of

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Vinegar

Lemons

Oranges

Tomatoes

The element with the highest first ionization potential is.

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Boron

Carbon

Nitrogen

Oxygen

PCl5 is an example of hybridization

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d sp³

d2 sp2

sp2

sp3

Oxygen and sulphur exist in state

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Free

Combined

_{Both free & combined}

None of above

A covalent bond which is formed between two atoms by the overlap of atomic orbitals along their axis is called.

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Pi bond

Sigma bond

Polar bond

Non polar bond

In the metallurgy of iron, when limestone is added to the blast furnaced, the calcium ion ends up in

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Slag

Gangue

Metallic calcium

Calcium carbonate

In manufacturing of cement crystallization of amorphous dehydration products of clay

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500 ^oC to 800 ^oC

900 ^oC to 1200^oC

1250 ^oC ti 1400 ^oC

1000 to 1100 ^oC

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