Question # 1

Which isomer of C4H9Br will produce 2-methyl propane-2-ol on treatment with aqueous KOH

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n-butyI bromide

Sec-butyI bromide

Isobutyl halide

Tertiary butyl chloride

pH value of pepsin is:

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3

2

4

1.4

A crystal system in which all three angles and all three edges are different is called

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triclinic

rhombohedral

cubic

hexagonal

The unit of pressure ______ is commonly used by meteorologists

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mm of Hg

Kilopascal

Millibar

Pound per square inch

The development of industries was a direct result of which major factor

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population

living standards

depletion of resources

all of these

Factors affected denaturation of proteins:

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Change in temp and pH

Strong reducing agent

Strong oxidizing agent

All of these

Which gas diffuses more rapidly?

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O₂

SO₃

NH₃

H₂

The morality of the solution containing x grams ammonium sulfate in 500cm3 of the solution is 0.6 what is x?

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39.6

40.5

42.7

45.1

Which of the following molecules has angel of 120°

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BeCl2

BF3

CH4

NH3

The molecule of CO₂ in dry ice form are the:

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ionic crystals

covalent crystals

molecular crystals

any type of crystals

Which of the following configurations corresponds to alkaline earth metals?

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[Ar] 3d10, 4s2

[Ne] 3d2, 3p2

[Ar] 4s2

[Ar], 3d10, 4s1

Naphthalene, iodine and NH_{4 can :}

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Sublime.

Both (a) and (c).

Crystallize.

None of above.

Chief air pollutant which is likely to deplete ozone layer

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Sulphure dioxide

Carbon dioxide

Nitrogen oxides and chloro fluorocarbons

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

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Polybenzene

Polyalcohol

Polypropylene

Polyethylene

Alkyle halides can be prepared by treating halogen acids with

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Ethane

Ethanol

Ethene and ethanol

Aldehyde

Which of the following statement is correct for a chemical reaction to occur molecules of substances must

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Collide with each other

Collide with energy more than activation energy

Collide with energy less than activation energy

Collide with high frequency

______ gives peroxide

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Li

Ba

Sr

Be

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Plank's equations

de Broglie's equations

Heisenburg's equation

None

Which heavy metals do not have any safe limits

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As

Hg

Cr

All of these

The geometrical shape of a transition complexion is related to the state of hybridizing of the central atom. What is trigonal bipyramidal

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sp³

dsp²

dsp³

d²sp³

The theory of chemical bonding has been a major problem of:

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Modern Physics.

Modern Chemistry.

Modern Biology.

Mechanics.

Factors affecting quality of water:

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D.O

BOD

COD

All of these

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