Question # 1

Molar mass of high molecular w.f. polymers ranges from:

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1000 to 10000

10000 to 100000

100000 to 1000000

1000 to 1000000

Which is an intermediate in SN1 reaction

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Ethoxide ion

Carbocation

alkyl halide

alkene

Which of following factor affect vapour pressure of a liquid?

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temperature

inter molecules forces

size of the molecules

all of these

Which of the following is a molecular formula of vinyl acetate

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C₄H₆O₂

C₂H₄O₂

C₄H₆O₃

None of these

Bond will be covalent when electronegativity difference of bonded atom is

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Equal to 1.7

between 0.5 to l.7

Greater to 1.7

zero

Glucose is converted into ethanol by the enzyme present in the yeast

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Urease

Zymase

Invertase

Sucrase

Primary pollutant is that:

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Waste product of an industry

Which causes cancer

Whose concentration cannot be controlled

Which corrode the metal only

The radioactive disintegration of 238U92 is

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First order

Second order

Third order

Zero order

Water is purified by the process:

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Aeration

Coagulation

Chlorination

All of these

Which of the following is not a postulate of the kinetic theory of gases?

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when gas particles collide, their total kinetic energy increases

gases consist of molecules in a constant state of random motion

when gas particles collide their total kinetic energy does not change at all

The gas particles travel in straight lines unit they collide with one another or with the walls of the container

A single chlorine free radical can destory how many ozone molecules

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10

100

1000

10000

Oxidation of ter-alcohol gives:

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Aldehyde

Formaldehyde

Ketone

Alkens

In sp²hybridization bond angle is _____

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120°

180°

109.5°

None

When quantity of electricity passed is one faraday then the mass deposited at the electrode is equal to

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One gm, atomic weight

One gm, Equivalent

Eletrochemical equivalent

None of the above

Hemoglobin contains nearly:

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10,000 atoms

100 atoms

1000 atoms

1 atom

At room temperature, the mole fraction of a solution in 0.25 and the vapour pressure of the solvent is 0.80 atm. Then the lowering of vapour pressure is

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0.75

0.512

0.80

0.0512

A single free chlorine radical can destroy ozone molecules upto:

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100000

100

1000

10000

The active part in a molecule is called

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Homologous series

Functional group

Chemical bonding

Ionic complex

S-block elements consist of

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Alkali metals

Alkaline earth metals

Alkali and alkaline earth metals

None of these

Rearrangement of an oxime to an amide in the presence of strong acid is called

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Curtius rearrangement

Fries rearrangement

Beckman rearrangement

Aldol condensation

Oxidation of 2-propanol gives

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Propanone

Butanone

Pentanone

None of these

Copolymer is

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Nylon-6

Nylon 66

PMMA

Polyethene

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