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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Tianwen-1 mission of China is related to_________...?

(A) Mars
(B) Jupiter

(C) Sun
(D) Moon

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The energy generation in starts is due to ...?

(A) Fission of heavy nuclei
(B) Fusion of light nuclei

(C) Fusion of heavy nuclei
(D) None of these

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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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In SI unit of time Picosecond is equal to how many seconds:...?

(A) 10
(B) 10-12

(C) 10-18
(D) None of these

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Sun's diameter is...?

(A) 3 million Km
(B) 2.5 million Km

(C) 1.4 million Km
(D) 1.8 million Km

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To make an uncharged object to have a negative charge we must...?

(A) Remove some portion
(B) Add some atoms

(C) Add some electrons
(D) None of these

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Which is the neutral particle...?

(A) Electron
(B) Proton

(C) Neutron
(D) None of these

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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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Magnetic tap is a ___...?

(A) Serial access medium
(B) Universal access medium

(C) Random access medium
(D) None of these

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