Question # 1

By using graphite electrode the electrolysis of aqueous solution of NaCI produces at anode

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H₂gas

Cl₂gas

NaOH

No metal

Which of the following ion has the highest value of ionic radius?

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Li⁺

F^-

O^2-

B³⁺

C- X bond is strong in

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CH₃Cl

CH₃Br

CH₃F

CH₃I

Which of the following oxides is unlikely to dissolve in aqueous hydroxide

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Al₂O₃

MgO

SO₂

SIO₂

Pollutant of automobile exhausts that affects nervous system/produces mental diseases is

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Mercury

Lead

Nitrogen oxide

Sulphuric oxide

Acetamides are formed by the reaction of carboxylic acids with

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Acids

Bases

Salts

NH₃

Hydroxyl amine is a derivative of::

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Alcohol

Aldehyde

Ammonia

Ketone

An electron with n = 3 , l = 2 will be in the sub-shell

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3p

3d

3f

3s

The cell which generates electricity as a result of spontaneous oxidation-reduction reaction is called

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Electrolytic cell

Nelson's cell

Galvanic cell

Down's cell

Alkanes normally have ______ hybridization

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Sp

Sp²

Sp³

d sp³

The alkyl halide is converted into an alcohol by

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Addition

Substitution

Dehydrohalogenation

Elimination

The term ebullioscopy is used for

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Depression of freezing point

Elevation in boiling point

Lower of vapour pressure

None of the above

Incomplete oxidation of alkanes yields

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CO₂& carbon black

CO₂+ heat

CO and carbon black

CO + heat

An electrophile may be

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Positive

Negative

Neutral

Both c and a

Number of neutrons in heavy hydrogen atom is

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0

1

2

3

Given date

(i) heat of neutralization of HCl and NaOH is -57.3 KJ mole^-1

(ii) heat of neutralization of CH₃COOH with NaOH is 55.2 KJ mole^-1

The enthalpy of ionization of CH₃COOH is a determined according to Hess's law by

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Adding i and ii

Dividing i by ii

Subtracting i from ii

Subtracting ii from i

Lactic acid on heating with dil. H₂SO₄gives

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Acetic acid

Propionic acid

Acrylic acid

Formic acid

What is the molarity of the solution that contains 20 grams of NaOH in 500 ml of solution [Na = 23, O = 16, H = 1]

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0.25

0.5

1

20

Grignard's reagent on treatment with chloramine give

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Acetamide

Primary amice

Secondary amice

Urea

The bond order for He₂molecule is

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zero

1/2

1

2

Which of the following solutions has the highest boiling point ?

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5.85% solution of sodium chloride.

18.0% solution of glucose.

6.0% solution of urea.

All have same boiling points.

Introduction of a second methyl group in methylbenzene will give how many isomeric dimethyllenzenes

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2

1

3

4

In incinerating the waste is burnt at

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1000°C

100°C

2000°C

1500°C

When the 6d orbital is completed the entering electron goes into

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7f

7 s

7 p

7 d

In CH₄, all the H-C-H bond angles are

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120°

107°

109°

109.5°

The atomic mass is measured in atomic mass unit (a.m.u.) which is equal to

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1.661 x 10^{-27- Kg}

1.661 x 10^-24Kg

1.661 x 10^{-27- g}

1.661 x 10^-24mg

The destructive distillation of coal gives three products. What is not the product of destructive distillation of coal

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Coal gas

Carbon dioxide

Coal tar

Coke

Two H-atom combine to form a strong H₂molecule due to

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Increase in potential energy

Decrease in potential energy

Energy remains unchanged

Distance is increased

Natural rubber is a polymer of

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Butadiene

Ethyne

Styrene

Isoprene

Alkyl halides on treatment with Zn and HCI gives

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Alkanes

Alkenes

Alkynes

Alcohols

As the nuclear charge increases, the pull on the electrons is increased and size of an atom:

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Decreases.

Remain same.

Increases.

Is negligible.

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