Question # 1

Mixture of alcohol and water can be separated by

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Solvent extraction techniques

Crystallization

Precipitation and filtration

Fractional distillation

Alkyl halides are considered to be very reactive compounds towards nucleophiles because

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They have an electrophilic carbon

They have an electrophilic carbon and a good leaving group

They have an electrophilic carbon and a bad leaving group

They have a nucleophilic carbon and a good leaving group

Two different hydrocarbon each contain the same percentage by mass of hydrogen. It follows that they have the same

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Empirical formula

Number of atoms in a molecules

Number of isomers

Relative molecular mass

NO and NO₂gases in atmosphere are represented by

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NO

NO₄

NO_x

N_xO_y

Compounds of carbon and hydrogen in which the tetra valency of carbon is fully satisfied are called,

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Saturated

Un-saturated

Magnetic

Para-magnetic

The equivalent weight of KMnO₄(formula weight = M) when it is used as an oxidant in neutral medium is

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M

M/2

M/3

M/5

Which property is not present in lipids?

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Liquid

Solid or semi solid

Soluble in water

Form emultion

What is the cause of water pollution

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Chemical and bacterial contents in live stock

The spilled oil in rivers and ponds

Wide spread use of pesticides

All of the above

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Increase in concentration of 1

Decrease in concentration of I₂

Increase in temperature

Increase in total pressure

Select from the following the one which alcohol

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In primary alkyl halides, the halogen atom is attached to a carbon which attached to how many carbon atoms?

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Two

Three

One

Four

Enzymes are

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Proteins

Minerals

Oils

Fatty acids

Ethanol can be converted into ethanoic acid by

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Hydrogenation

Hydration

oxidation

Frmentation

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Addition Elimination

Addition Reduction

Elimination Reduction

Substitution Elimination

Number of moles of the solute dissolved per dm³of the solution is knows as

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Molarity

Formality

%age

None of these

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

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Methane

Carbon dioxide

Water

chloroflurocarbons

The process of osmosis was first discovered by

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Nollet

Pfeffer

Traube

Dutrochet

Depletion of ozone layer is due to

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Oxides of nitrogen

Oxides of carbon

Oxides of sulphur

None of the above

When phenol is distilled with zinc dust. It is reduced to

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Benzene

Benzaldehyde

Toluene

Hexanol

Which of the following compounds will react with reagent ?

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CH₃ CO H

CH₃ CO CH₃

CH_{3 COOH}

CH₃CO CH₂CH₃

Cannizzaro's reaction is type of reaction:

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Self oxidation-reduction reaction

Disproportion reaction

Addition

A and B

The comparative rates at which the solutes move in paper chromatography, depend on:

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the size of per sued.

R_f values of solutes

temperature of the experiment

size of the chromatography tank used.

The acid present in the stings of bees and wasps in

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Acetic acid

Formic acid

Formalin

Formaldehyde

In azeotropic mixture showing negative deviation form Raoult's law show

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Higher b.p. than either

Lower b.p. than either

No change in b.p.

None of these

According to VSEPR theory, the shape of the water molecule is

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Octahedral

Distorted tetrahedral

Planar triangle

Linear

Soft drinks and baby feeding bottles are generally made up of

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Polyester

Polyurethane

Polyurea

Polystyrene

The volume occupied by 1.4 g of N₂at S.T.P is

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2.24 dm³

22.4 dm³

1.12 dm³

112 cm³

The structure of complex hydrides is

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Tetrahedal

Trigonal

Octahedral

Square planar

The state of hybridization of carbon atom in methane is:

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sp³

sp²

sp

dsp²

Who one mole of each of the following is completely burned in oxygen, which gives the largest mass of carbon dioxide?

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Carbon monoxide

Diamond

Ethane

Methane

The number of unpaired electrons in the p-subshell of oxygen atom

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1

2

3

4

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