Question # 1

Which of the following is derived lipid

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Sterols

Vit D

Terpenes

All

Metals are good conductor of electricity, but their conductivity decreases by increase in temperature because

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electrons attracted strongly by the nuclei which resists their free motion

atoms form ionic bond and no free electrons

electrons go to the iocalized orbital not free

positive metal ions begin to oscillate and their motion hinders the free movement of electrons

Higher the surface area available for reaction

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slower the reaction

faster the reaction

constant the reaction

lower the Ea

Substances that tend to decrease the activity of enzymes are called

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coenzyme

activators

inhibitors

apoenzyme

Which step is unnecessary for purification of water for drinking purposes

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aeration

coagulation

treatment with chlorine

treatment with iodine

No of unpaired electrons are maximum in

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V+3

Mn+2

Fe+3

Cr+3

A single chloride free redical can destroy bow many ozene molecules?

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100

100000

10000

10

The volume of given mass of gas is directly proportional to absolute temperature when pressure is kept constant this is called

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Boyle's law

Charles's law

Graham's law

Dalton's law

Which of following is oxidation state of oxygen in peroxides?

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-2

1/2

-1

+2

An oil of fat with no double bond have iodine number:

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Zero

100%

50%

Minimum

The diffusion of gasses at absolute zero will be:

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Slightly decrease

unchanged

Slightly increased

Zero

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NH₃ HCl

KCN in C₂H₅OH NaOH

KCN in C₂H₅OH HCl

HCN NaOH

Which one of the following is the most abundant organic substance found in nature

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Fructose

Starch

Glucose

Cellulose

UV radiations bring about

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Skin cancer

Mouth cancer

Lung cancer

Liver cancer

Which of the following is an isomer of ethanol

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CH₃OCH₃

C₂H₅OC₂H₅

CH₃OH

C₂H₅OH

Benzene was discovered by Michael Faraday's in

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1824

1825

1826

1827

Which one of the following reagents will distinguish between C₆H₅CHO and C₆H₅COCH₃

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Aqueous bromine

Phosphorus pentachloride

2, 4 DNPH

Tollen's reagent

The molarity of the solution containing x grams (NH₄)₂SO₄in 500 cm³of the solution is 0.6 what is x

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39.6

45.1

40.5

42.7

The element caesium bears resemblance with

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Ca

Cr

Rubidium

None of the above

Classical smog occurs in palces of

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Excess SO₂

Low temperature

High temperature

Excess NH₃

In the earth crust sodium is

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2.50%

2.30%

2.40%

3.50%

The reaction in which ketone is reduced to the alkane is called

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Kolb

Clemmensen

Cannizzaro

None

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