Question # 1

Same amount of electric current is passed through solutions of AgNO₃and HCl. If 1.08 g of silver is obtained in the first case, the amount of hydrogen liberated as S.T.P in the second case is

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112 cm³

22400 cm³

224 cm³

1.008 g

A half reaction can be defines as :

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It always occurs at cathode.

Involves only half of a mole of electrolyte.

Occurs at one of the electrode.

Goes only half way to completion.

The theory of chemical bonding has been a major problem of:

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Modern Physics.

Modern Chemistry.

Modern Biology.

Mechanics.

In Friedal-Craft's alkylation besides AlCl3 the other reactants are

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C6H6 + NH3

C6H6 + NH4

C6H6 + CH3Cl

C6H6 + CH3COCl

Water pollution is mainly due to

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Sulphure dioxide

Carbon dioxide

Oxygen

Industrial discharges

Ethylene decolorizes cold dilute solution of KMnO₄. This test is known as

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Colouration test

Baeyer's test

Silver mirror test

Ring test

The conductivity of strong electrolyte

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Increases on dilution slightly

Does not change on dilution

Decreases on dilution

Depends on density of electrolyte it self

The major components of coal gas are

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Hydrogen and methane

Ethane and carbon monoxide

Nitrogen and ethane

Ethane and carbon dioxide

Alkyl benzenes are readily oxidized by axidfied

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KMnO₄

K₂CO₃

MnO₄

H₂SO₄

Toluene is also called

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Hydroxyl benzene

Methyl benzene

ethyl benzene

None

What is formed when propanone is refluxed with an anhydrous solution of NaBH₄

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Propanal

Propan-1-ol

Propan-2-ol

Propane

Which statement is true about order of reaction :

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Order of reaction can only be determined by an experiment.

Order of reaction can be determined from a balance equation only.

Order of reaction increase by increasing temperature.

Order of reaction must be in whole number and not in fraction.

During a chemical reaction heat may be

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absorbed

Evolved

Both evolved and absorbed

None of these

Which of the substances Na, Hg, S Pt and graphite can be used as electrodes in electrolytic cells having aqueous solution?

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Na, Pt and graphite

Na and Hg

Pt and graphite only

Na and S only

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A solution of glucose is of methanol in water has vapor pressure :

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Equal that of water.

Equal to that of methanol.

More than that of water.

Less than that f water.

Which of the following is not an electrophitic substitution reaction of benzene

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Nitration

Sulphonation

Fridel-Craft alkylation

Free radical chlorination of benzene

Swage water is purified by

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Microorganisms

Light

Fishes

Aquatic plants

The best buffer is prepared when molar concentrations of the salt and acid are equal, then its pH and pKa value are related

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pH = pKa

pH < pKa

pH > pKa

pH x pKa = 14

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Proton donar

Dehydrating agent

Catalyst

Electrophile

Dilatometer method is useful for the reaction that involve :

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Small volume changes in solutions

Change in infractive indices

Where reactants absorb U.V, visible or infrared radiation

Dehydration of an alcohol at 180°

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Alkene

Ether

Ester

An hydride

Precipitation will occur until the ionic product becomes

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Equal to K_sp

Lesser than K_sp

Greater than K_sp

None of these

What is the maximum mass of aluminium which can be obtained from 240g of aluminium oxide Al₂O₃?

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26 g

127 g

51 g

108 g

Bell metal is an alloy of Sn and

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Copper

Iron

Zinc

Magnesium

Which one of the following gases is used for artificial ripening of fruits ?

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Ethane

Ethyne

Methane

Propane

When a metal is dipped in 1 molar of its solution at 298 K. then potential set up is called

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Standard electrode potential

Electric charge

Ionization potential

Electroplating

Molecules of High molecular weight usually greater than 10,000 are called:

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Macro molecules

Mega molecules

Poly molecules

Gega molecules

When 6s orbital is complete then next electron goes to

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6p

6d

5d

4f

A compound containing carboxyl group in them are called:

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Ketone

Ether

Carboxylic acids

Polycarboxylic acid

Which is not carboxylic acid with pungent smell?

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Formic acid

Acetic acid

Ethanoic acid

Butyric acid

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