A camera uses a _____ to form an image.

A: concave lens

B: convex lens

C: condenser lens

D: none of these

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convex lens

Humans can hear in the range of ______ to __Hertz (Hz).?

A:  20 Hz to 20,000 Hz.

B: 10 Hz to 10,000 Hz.

C:  30 Hz to 30,000 Hz.

D:  40 Hz to 40,000 Hz.

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 20 Hz to 20,000 Hz.

Water vapour beyond the dew point result in____?

A: Hailstorm

B: Precipitation

C: Condensation 

D: Formation of ice

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Condensation

Nearest galaxy to our milky way is ___?

A: Andromeda

B: Messier 81

C: Triangulum

D: Whirlpool

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Andromeda

Sunlight is made of_____colours?

A: Five colours

B: Seven colours 

C: Three colours

D: Non of these

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Seven colours

The major part of natural gas, petroleum and coal consists of?

A: Chlorine

B: Carbon

C: CFC

D: Methane

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Methane

Approximate age of sun is ____?

A: 4.5 billion years

B: 4.4 billion years

C: 4.6 billion years

D: 4.7 billion years

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4.6 billion years

What “Enrico Fermi” invented?

A: Betatron

B: X ray machine

C: Cyclotron

D: Nuclear reactor

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Nuclear reactor

Vitamin C deficiency leads to:_______?

A: Cold

B: Scurvy

C: Cancer

D: Rickets

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Scurvy

Which of the following is not a part of Darwinism?

A: Natural selection

B: Over production

C: Inheritance for acquired characters

D: Competition for survival

E: None of these

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Over production

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