Which one of the following is the main culprit in the thinning of Ozone layer in the earth’s stratosphere...? Mcqs

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Which one of the following is the main culprit in the thinning of Ozone layer in the earth’s stratosphere...?

(A) Carbon dioxide
(B) Chlorofluorocarbons

(C) Nitrogen oxides
(D) Methane

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Near Earth's surface g = ______...?

(A) 10 ms^-2
(B) 1.6 ms^-1

(C) Both (a) and (b)
(D) None of these

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The particles in a Solid have the following movement...?

(A) Move freely in any direction
(B) Vibrate at a fixed position

(C) Move randomly at long distances
(D) Remain stationary

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Which one of the following is not a advantage of friction...?

(A) Walking
(B) Breaking

(C) Securing knots
(D) Fasteners

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Which of the following slows down the formation of RBCs (Red Blood Cells)...?

(A) Vitamin B-1
(B) Vitamin C

(C) Vitamin D
(D) Vitamin E

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A wheel with pointed edges like teeth are...?

(A) Pulley
(B) Gear

(C) Axle
(D) Sprocket

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When the moon comes in front of the sun and blocks most of the sunlight from reaching the earth is known as...?

(A) A Solar Eclipse
(B) A Lunar Eclipse

(C) A Venus Eclipse
(D) A Earth Eclipse

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Medium which sends signal from source to destination is known as ________ ...?

(A) Transmitter
(B) Transmission channel

(C) Receiver
(D) Hardware

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How many Number of eyes found in Earthworm...?

(A) One
(B) Many

(C) No eye
(D) Two

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Which one of the following is reducing agent...?

(A) H2S04
(B) HNO3

(C) Al
(D) I2

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