Question # 1

The conversion of molecules of A to B follows a second order kineties. Doubling the concentration of A will inerease the rate of formation of B by a factor of

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2

4

1/2

1/4

If absolute temperature of a gas is doubled and pressure is reduced to one half, then the volume of the gas will

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remains unchanged

increases unchanged

reduces to 1/4

increases 4 times

Most harmful of biosphere is

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Deforestation

Nuclear fail out

Salinity

Water logging

The increase in reaction rate as a result of increase in temperature from 10K to 90K is

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512

256

400

112

Formation of PVC form vinyl chloride is an example of

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substitution reaction

addition polymerization

condensational reaction

Aldol condensation

Which products are formed when triglyceride is hydrolysed

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Glycerol

Fatty acid

Glycerin

Both A and B

Real gases deviate from the ideal behaviour at very

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high pressure

low temperature

low pressure

both a and b

The beaker contains slurry of ice and water, the three thermometers Fahrenheit, Kelvin and centigrade placed init. the thermometers are represented as A, B and C respectively, On which thermometer the lowest reading will be?

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B

A

C

both A and B

A substances has M_r74.5, a melting point of 772°C and a boiling point of 1407°C. It conducts electricity only when in the liquid state.What is the bonding present in this substances?

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covalent

ionic

metallic

hydrogen bonding

By convention, the standard heat of formation of all elements is assumed to be

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Zero

positive

Negative

Infinity

The word polymer is derived from words poly mean many and mer means unit.

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Latin

Greek

English

French

An azeotropic mixture of two liquids boils at a lower temperature than either of them when lower temperature

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It is saturated

it shows positive deviation from Raoult's law

It shows negative deviation form Raoult's law

It is metastable

The development of disagreeable odur in fats or oil is called

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Fragrance

Perfume

Rancidity

Smell

The apex angle of the folded filter paper is slightly greater is termed as:

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60 degree

30 degree

45 degree

90 degree

The energy of the first electron is helium will be

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-13.6 eV

-54.4 eV

-5.44 eV

zero

A carboxylic acid containing Ar group in it is called:

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Aromatic carboxylic acid

Allphatic carboxylic acid

Dicarboxylic acid

Carboxylic acid

In chromatography, the point at which solvent maximum rises called:

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Solvent front

Base line

Element

Chromatogram

Alcohol can be prepared from Grignard's reagent with an aldehyde: If we start with formaldehyde the product alcohol with be

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Primary

Secondary

Territory

Aromatic

Substitution of halogen in the benzene ring requires catalyst

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AlCl₃

FeCl₃

SiO₂

Organo - nickel

Gammexane is

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Chlorobenzene

Benzyl chloride

Brommobenzene

Benzene hexachloride

In cold countries ethylene glycol is added to water in radiators of cars during winter. It results in

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Lowering in b.pt

Reducing viscosity

Reducing specific heat

Lowering in freezing pt

C- X bond is strong in

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CH₃Cl

CH₃Br

CH₃F

CH₃I

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