Question # 1

Phenolphthalein produces red colour in

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Acid

Base

Both a and b

None of these

Glucose is:

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Hexabydroxy aldehyde

Hexahydroxy ketone

Polyhydroxy aldehyde

Pentahydroxy ketone.

The % age of carbon is bituminous is

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60

70

80

90

Some orchids attracts bees for pollination by producing.

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alkanes

almenes

alkynes

all the above.

Latin word 'Acidus' means:

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sweet

salty

sour

bitter

Vibrious cholera causes.

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Choleera

Dysentery

Fluorsis

Hepatitis

The molecular formula of the first three members of the alkane hydrocarbons are CH_4,C₂H₆ and C₃H₈. What is the molecular formula for the eight alkane member, octane, which is found is petrol?

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C₈H₈

C₈H₁₆

C₈H₁₈

C₈H₂₀

Which one of the following is not faction of crude oil.

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Paraffin wax

Asphalt

Fuel oil

Petroleum coke

In dry cleaning, which chemical is used.

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Chloroform

Carbon tetachloride

Ecetaldehyde

Ethanol

Grease stains from clothes are removed by sing.

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Ammonium nitrate

Aluminium hydroxide

Ammonium hydroxide

Aluminum chloride

Which one of the not metal.

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Copper

Carbon

chromium

Iron

How many % age of nitrogen present in air by volume?

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70%

75%

78%

80%

Volatility of hydrocarbons deceases with:

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decrease of molecular mass

increase of molecular mass

increase of double or triple bonds

decrease of triple bonds

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