Question # 1

Which one is the formula of chloromethane.

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CH₂Cl₂

CCl₄

CHCl₃

CH₃Cl

DNA was discovered by

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J .Watson

Funk

Robert brown

Hopkins

The % age of carbon is lignite is

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60

70

80

90

The product of any Lewis acid-base reaction is a single specie called:

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free radical

adduct

molecular ion

conjugate

Methyl butanoate smells like;

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a pine apple

an apple

an orange

a lemon

The order of reactivity of hydrogen halides with alkenes is.

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HI>HBr

HBr>HI

HCl>HBr

HBr < HCl

Jabir Bin Haiyan prepared.

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Nitric Acid

Hydrochloric acid

Sulphueric Acid

All of these

Who was prepared acetic acid in laboratory?

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Berzelius

Wohler

Kolbe

Dalton

Mallic acid is present in

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Apple

Feats

String of bees

Urine

Raw materials used in Solvay's process.

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Brine

Lime stone

Ammonia gas

All

Froth flotation process is used to concentrate.

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Copper ore

Iron ore

Chromium ore

Aluminum ore

The forward reaction takes place:

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Right to left

Left to Right

Only to right

Only to left

Which one of the followoing is the Hardest coal.

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Peat

Lignite

Bituminous

Anthracite

The major constituents of troposphere are:

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carbon dioxide and argon

nitrogen and oxygen

argon and oxygen

carbon dioxide and oxygen

Carbohydrates are synthesized by plants through.

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Respiration

Photosynthesis

Dehydrateion

Evaporation

Which one of the diseases causes severe diarrhea and can be fatal?

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Jaundice

Dysentery

Cholera

Typhoid

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