Question # 1

The percentage of potable water on earth is.

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2%

0.2%

0.02%

0.002%

Normally rain water is weakly acidic because of.

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SO₃ gas.

CO₂gas.

SO₂gas.

NO₂gas.

Which of the following can be used as a fuel?

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Methanol

Ethanol

Bio-diesel

All of them

Rickets disease is caused by the deficiency of.

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Vitamin D

Vitamin A

Vitamin E

Vitamin C

Which one is Lewis Acid?

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BF₃

AICI₃

FeCl₃

All of these

Crude oil is heated to the fractionating furnace upto.

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300 ^oC

350^oC

400^oC

450^oC

Brown hair contains.

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Iron compound

Copper compound

titanium compound

Both a and b

Which is a hereditary material?

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DNA

RNA

Protein

All of them

For which reaction Kf is the rate constant?

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Forward reaction

Backward reaction

Upward reaction

Downward reaction

Which one of the following is gas at room temperature:

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C2H6

C6H14

C6H6

C8H18

The number of carbon atoms present in petroleum ether.

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1-5

2-5

3-7

5-7

The acid which is called king of chemicals.

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Sulphuric Acid

Nitric Acid

Hydrochloric acid

Acetic acid

The layer above troposphere extend upto 50 kilometers called.

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Mesosphere

Hydrosphere

Stratosphere

Thermosphere

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