Why is the Ozone important for mankind...? Mcqs

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Why is the Ozone important for mankind...?

(A) Protection from ultraviolet rays of sun
(B) It releases oxygen in the air

(C) It maintains temperature of the earth
(D) It releases hydrogen in the atmosphere

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The 2nd smallest planet in our solar system is ___________...?

(A) Mars
(B) Mercury

(C) Uranus
(D) None of these

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A ball thrown vertically upwards, on reaching its highest point its value of acceleration due to gravity would be...?

(A) 9.8 m/s downwards
(B) 9.8 m/s upwards

(C) 0.8 m/s vertical
(D) None of these

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Which planet takes the longest time to go once around the Sun...?

(A) Neptune
(B) Mars

(C) Jupiter
(D) Earth

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Which of the following is the most important factor in causing mass movements...?

(A) Temperature
(B) Pressure

(C) Water content
(D) Bulk composition

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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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Who among the following invented steam engine...?

(A) Enrico Fermi
(B) James Watt

(C) James Boyle
(D) None of these

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Which area is known as World's earthquake belt...?

(A) Pacific ring of fire
(B) Andes Range

(C) Sharm el Sheikh , Egypt
(D) Central and Atlantic Ridge

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Phases of the moon occur because:...?

(A) we can see only that part of the moon which reflects sunlight light towards us
(B) our distance from the moon keeps changing

(C) the shadow of the Earth covers only a part of the moon’s surface
(D) None of these

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What is the boiling point of water...?

(A) 60 °C
(B) 80 °C

(C) 100 °C
(D) 120 °C

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