Question # 1

Who discovered the smallpox vaccine:

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Joseph Lister

Alexandr Fleming

Louis Pasteur

Edward Jenner

Which one among the following methods is not effective in removing arsenic form contaminated ground water?

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Boiling

Reverse osmosis

Ton exchange

Coagulation-adsorption

Light energy is stored in the forms of due to the activity of chloroplast:

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Mechanical energy

Electrical energy

Chemical energy

None of the above

How many time zero are used between 1 to 100 numbers:

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20

12

11

10

The most commonly used bleaching agent is

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Sodium chloride

Carbon dioxide

Chlorine

Alcohol

The primary energy for living organisms is

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Solar energy

ATP

Chemical energy

Mitochondria

Oil spreads over the surface of water because:

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Oil is more dense than water

Oil less dense than water

Oil has more surface tension then water

Oil has less surface tension than water

Which one among the following statement is correct

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Concave mirrors are used as reflectors

Convex mirrors are used by doctors to examine oral cavity

Convex mirrors are used as refactors

Convex mirrors should be used for

What do you call the positive electrode of an electric cell?

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Diode

anode

grid

cathode

The term 'Carat' is used to express the purity of gold. The purest form of gold is.The purest form of gold is?

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18 carats

20 carets

22 carats

24 carats

Which of the following is star

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Sun

Mercury

Pluto

Venus

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