Question # 1

Which one of the following does not show isomerism?

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Propane

Hexane

Butane

Pentane

The units of ionic product of H2O is

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Mole dm-3

Mole2 dm-6

Mole-1 dm-3

Mole-2 dm-6

Sterols, vitamin D and terpenese belong to

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Simple lipids

Complex lipids

Derived lipids

None

Primary structure of proteins refers to

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Coiling and folding in form of specific structure

Number of amino acids in a chain

3d structure

Alpha and Beta sheets

It is very much difficult to cook food at Mount Everest, because

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temperature of atmosphere is very low

the boiling point of water is 69°C

water becomes heavier

the boiling point of water is increased

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

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Carbon

Hydrogen

Nitrogen

Sulphur

The three dimensional folding and twisting of a polypeptide chain give rise to

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Primary structure

Secondary structure

Tertiary Structure

All of these tertiary

Which one of the following is not type of polymer:

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copolymer

homopolymer

terpolymer

hereropolymer

Glycerine is a polar compound. It boils at 290°C under one atmospheric pressure. It should be distilled under reduced pressure due to reason that

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there are strong intermolecular forces between molecules of glycerine

it decomposes at 290°C

low pressure makes the liquid to boil at high temperature

the reduced pressure decreases the boiing point of liquids

All the following have crystals except:

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potassium bromide

diamond

cadmium sulphide

sodium chloride

The change in enthalpy of a system when one mole of the substance is completely burnt in excess of air or oxygen is called

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Heat of reaction

Heat of formation

Heat of atomization

Heat of combustion

Law of mass action states that rate of chemical reaction is directly proportional to the product of active masses of the reactants. The term active mass means

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Mass in grams converted to products

Number of moles

Number of moles per dm³of reactants

Total pressures of the reactants

Which of these polymers is an addition polymer

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Nylon 6,6

Polystyrene

Terylene

Epoxy resin

denaturing of alcohol is done by adding methanol in ethanol:

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10%

20%

30%

40%

The orbital in Rutherford's model is

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Spiral

Circular

Both

None

Which is not interstitial hydride

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LaH

VH

TaH

None

Ethylene polymerizes at 100 atm pressure and 400°C to give

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Polybenzene

Polyalcohol

Polypropylene

Polyethylene

Law of mass action was given by :

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Guldberg and Waage.

Berkeley and Hartly.

Ramsay and Reyleigh.

Berthelot.

The filtration process is used to separate solid from:

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Liquid

Gas

Solid

All of above

A single chlorine free radical can destroy how many ozone molecules

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100

100000

10000

10

Alkanes normally have ______ hybridization

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Sp

Sp²

Sp³

d sp³

The cell which generates electricity as a result of spontaneous oxidation-reduction reaction is called

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Electrolytic cell

Nelson's cell

Galvanic cell

Down's cell

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