Question # 1

An alkyl halide reacts with NH3 to give

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Amide

Cyanide

Amine

Aniline

Which element is expected to show the greatest tendency to form some covalent compounds?

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aluminium

calcium

magnesium

sodium

Some of crystals are good conductors of heat and electricity, they may be

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ionic in nature

of metallic character

covalent in nature

of molecular nature

An amion acid exists in the form of Zwitter-ioin which has:

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one + ve charge

one - ve charge

one +ve and -ve charge

two +ve charge

Phosphorus is very useful in the growth of:

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leave

stem

seed

root

The reaction of alkyl halide in the presence of alcoholic KOH is

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Substitution

Addition

Acid-base

Elimination

The sole produets of combustion analysis are

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CO2 and NH3

H2O and Mg(CIO4)2

CO2 and KOH

CO2 and H2O

Volcanoes produce SO₂:

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47%

57%

67%

77%

The conc.of dissolved molecular oxygen in water which act as the most important oxidizing agent ranges from:

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2ppm- 6ppm

4ppm--8ppm

2ppm--- 4ppm

2ppm --3ppm

The volume of given mass of gas is directly proportional to absolute temperature when pressure is kept constant this is called

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Boyle's law

Charles's law

Graham's law

Dalton's law

How many fertilizer plants are now in Pakistan?

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20

14

12

10

Amides on treatment with Br₂and KOH are converted into amines, the reaction is known as

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Hoffmann's bromamide reaction

Hoffmann's methylation

Gabriel phthalimide reaction

H.V.Z reaction

A solution sucrose is 34.2%. The volume of solution containing one mole of solute :

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342cm³

1000cm³

500cm³

242cm³

Industrial alcohol may be denaturated by the addition of

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Methyl alcohol

Acetone

Pyridine

Any of the above reagent

Which of the following has highest first ionization potential?

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Carbon

Oxygen

Nitrogen

Boron

The formula of lime stone is

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CaCl₂

MgCO₃

Na₂CO₃

CaCO₃

The reagents like KMnO_{4 and HCL cannot be filtered through Gooch crucible if its base is covered with :}

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Butterfly paper.

Ordinay paper.

Flying paper.

Filter paper.

Which one of the following in mainly responsible for depletion of ozone layer?

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Methane

Carbon dioxide

Water

chloroflurocarbons

Which alcohol gives only one oxidation product when wormed with dil acidified K₂Cr₂O₇

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Butan-1-ol

Butan-2-ol

2-methyl propan-1-ol

2-methyl propan-2-ol

Sulphonation of benzoic acid produces mainly

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o-Sulphobenzoic acid

m-sulohobenzoic acid

p-Sulphobenzoic acid

o-and p-Sulphobenzoic acid

Peat before conversion to bituminous coal is converted to

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Lignite

Anthracite

Asphalt

None

Partial reduction of acetic acid happens with

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NH₃

LiAIH₄

P + HI

PCI₅

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