The depletion of ozone layer has been caused mainly by _____...? Mcqs

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The depletion of ozone layer has been caused mainly by _____...?

(A) The release of industrial waste
(B) The deforestation of large area land

(C) The release of chlorofluorocarbons into the atmosphere
(D) None of these

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Global winds towards western direction are known as:...?

(A) Trade winds
(B) Western winds

(C) Reynolds wind
(D) None of these

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Permissible noise level at Residential area during night time is:...?

(A) 45 dB
(B) 55 dB

(C) 75 dB
(D) 80 dB

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Liquid can be converted into solid by...?

(A) Heating
(B) Cooling

(C) Both A and B
(D) None

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Another name of RDX is ___________...?

(A) Cyanohydrin
(B) Dextran

(C) Cyclohexane
(D) Cyclonite

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A region in a longitudinal wave where the particles are closest together is called...?

(A) Rarefaction
(B) Compression

(C) Crest
(D) Trough

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Winter Solstice means____________...?

(A) longest night
(B) longest day

(C) smallest night
(D) smallest day

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Which of the following is not an example of concave mirror...?

(A) Cosmetic mirror
(B) Dentist mirror

(C) Security mirror
(D) Car headlight mirror

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In 2013, Planck measured the age of the universe at ___________...?

(A) 13.82 billion years
(B) 4.53 billion years

(C) 4.6 billion years
(D) 4.53 billion years

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UPS is now widely use in households. What does UPS stands for ...?

(A) Uniform Power Storage
(B) Universal Product Support

(C) Under Panel Storage
(D) Uninterruptible Power Supply

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