The lowest zone of atmosphere containing about seventy five percent of total mass of atmosphere and ninety percent of its water vapour is called...? Mcqs

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The lowest zone of atmosphere containing about seventy five percent of total mass of atmosphere and ninety percent of its water vapour is called...?

(A) Troposphere
(B) Lonosphere

(C) Aerosphere
(D) Stratosphere

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Optical fiber works on the principle of ______...?

(A) Scattering
(B) Total Internal Reflection

(C) Interference
(D) Principle of refraction

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In the atmosphere, if the temperature is low then the pressure is ____...?

(A) Low
(B) High

(C) Normal
(D) All of these

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The blue colour of the clear sky is due to...?

(A) Refraction of light
(B) Reflection of light

(C) Diffraction of light
(D) scattering of light

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Hydrometer is used to measure...?

(A) Acidity of water
(B) Specific gravity of a liquid

(C) Pollution in water
(D) Gravity of milk

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H=100-4t The equation above can be used to model the number of hours h until a gallon of milk held at a temperature of t, in degrees Celsius, goes sour. Based on the model, which of the following is the best interpretation of the number 4 in the equation...?

(A) An increase of 1 degree Celsius will make a gallon of milk go sour 4 hours faster
(B) An increase of 1 degree Celsius will make 4 gallons of milk go sour 1 hour faster

(C) An increase of 4 degrees Celsius will make a gallon of milk go sour 1 hour faster
(D) An increase of 4 degrees Celsius will make a gallon of milk go sour 4 hours faster

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The theory stating that new matter is always created to fill the space left by the Universe is called...?

(A) Big Bang
(B) Steady State

(C) Hubble's Theory
(D) Black Hole

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What is S.I unit of temperature...?

(A) Kelvin
(B) Celsius

(C) Fahrenheit
(D) None of these

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If there is no Sun, The color of the sky would be ...?

(A) Orance
(B) Blue

(C) Yellow
(D) None of these

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Which type of mirror is used in the head lights of vehicles...?

(A) Concave
(B) Convex

(C) Plain
(D) None of these

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