Question # 1

Ethene is produced from ethyl chloride by reacting with alcoholic KOH. The process is called

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Hydrogenation

Dehydrogenation

Dehydrohalogenation

Oxidation

Which of the following metal oxides is antiferromanetic in nature?

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MnO₂

TiO₂

NO₂

CrO₂

Aspartic acid is a (an)

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Monoamino dicarboxylic acid

Diamino Monocarboxylic acid

Aromatic amino acid

Imino acid

To which of the following mixtures Dalton's law of partial pressures is not applicable?

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CO and CO₂

CO₂ and N₂

CH₄ and C₂H₆

HCI and NH₃

The structure normally associated with ionic bonding is:

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a giant lattice

a simple molecule

a giant molecule

a regular arrangement of ions surrounded by a sea , or cloud, of electrons

The buffering property of proteins is due to the presence of

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Acidic and basic group

Hydrogen bonds

Indole group

Hyrophobic

The reagent for alkaline hydrolysis of ethyl bromide to form ethyl alcohol is

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water at room T

Alcoholic KOH+heat

Ethanol + heat

dil. NaOH+ heat

Polar ice caps can melt due to

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Acid rain

Green House Effect

Smog

Chlorofluorocarbons

Reaction kinetics is important to discover the---under which reaction will proceed most economically:

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rate constant

Conditions

volume

equilibrium point

Which compound is obtained hy the elimination reaction on bromoethane?

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Butene

Ethene

Propene

Propane

Amorphous solids

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have sharp melting points

undergo clean cleavage when cut with knife

have perfect arrangement of atoms

can possesses small regions of orderly arrangements of atoms

Which behaves ass insulator for animals body?

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Carbohydrates

Protiens

Fats

skin

The three N - Hσ-bonds are made by

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sp³- s overlap

sp²- s overlap

P - p overlap

sp - overlap

When hydrogen cyanide is added to an Aldehyde in the presence of ammonia it is called

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Strecker synthesis

Cory house synthesis

Williamson;s synthesis

None of these

Which one of following is not monocyclic aromatic hydrocarbon

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Benzaldehyde

Benzoic acid

Benzene sulfonic acid

Biphenyl

Soft drinks and baby feeding bottles are generally made up of

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Polyester

Polyurethane

Polyurea

Polystyrene

Heavy water is obtained by

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Prolonged electrolysis of water

Dissolving heavy salt in water

Simple distillation of water

Removing impurities of calcium and magnesium form water

In alkynes the bonds between carbon atoms are

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All sigma bonds

All pi(π) bonds

One is sigma and two areπ(pi) bonds

One isπ(pi) and two are sigma bonds

The solution of which acid is used for seosoning of food ?

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Formic acid

Acetic acid

Benzoic acid

Butanoic acid

Which one of the following elements is not present in all proteins

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Carbon

Hydrogen

Nitrogen

Sulphur

Sp³hybird orbitals are oriented at an angle of

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107.5°

108.5°

109.5°

103.5°

At present cement plants in Pakistan are:

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Ten

Twenty Two

Four

Twenty Four

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