Question # 1

Glycerin boil at 290°C under normal atmospheric pressure. If the pressure is reduced to 50 mm of Hg, it will boil

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above the given temperature

below the given temperature

at the same temperature

at 25°C

The substance upon which an enzyme acts is known as its

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domain

field

substrate

reactant

The reaction between fat and NaOH is called:

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esterification

hydrogenolysis

fermentation

sponification

How many CI^- ions are there around Na+ ion in NaCI crystal?

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3

4

6

8

Third structure of protein structure refers to

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Number and sequence of amino acids

Three dimensional structure of protein

Proteins formed of more than one monomer

Bending of protein molecule

Which of the following polymers is used for weather resistant paints

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acrylic resins

polyvinyl acetate

polystyrene

PVC

In which of the following molecules strongest hydrogen bond is shown

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water

ammonia

hydrogen fluoride

hydrogen sulphide

Which of the following is not molecular crystal

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Sugar

Iodine

Ice

Graphite

The non polar gases of low polarizability have a very:

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Low critical temperature

Stable critical temperature

High critical temperature

Which one of the following is not an alicyclic compound?

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Cyclohexene

Cyclohexane

Benzene

Cyclopentane

Phosphorous is very useful in growth of:

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Leave

Root

Stem

Seed

Enzymes are catalysts which contain other than carbon and hydrogen one other element

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Oxygen

Sulphur

Phosphorus

Iodine

Ethyl alcohol is industrially prepared from ethylene by

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permanganate oxidation

Catalytic reduction

Absorbing in H₂SO₄followed by hydrolysis

Fermentation

The chloroform reacts with NaOH to give

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CH₃COONa

Sodium oxalate

CH₃OH

HCOONa

Free radical mechanism of halogenation of alkanes follow step:

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Initiation

Propagation

Termination

All of these

The filtration process is used to separate solid from:

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Liquid

Gas

Solid

All of above

Which of these polymers is a synthetic polymer?

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Animal fat

Starch

Cellulose

Polyester

Which of the following has zero depole-moment?

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CIF

PCl₃

SiF₄

CFCl₄

Rusting can be avoided by :

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Making alloys

Tin or Zinc plating

Use of enamel

All of these

Which of the following does not exhibit the periodicity in properties of the elements?

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Ionisation energy

N/P ratio

Electronegativity

Atomic radius

Cl₂reacts with CS₂in presence of AlCl₃to form

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CHCl₃

CCl₄

C₂H₅Cl

C₂H₆

Chief air pollutant which is likely to deplete ozone layer

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Sulphure dioxide

Carbon dioxide

Nitrogen oxides and chloro fluorocarbons

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