What is known the cold and dense air blowing down from the mountain slope during the night__________...? Mcqs

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What is known the cold and dense air blowing down from the mountain slope during the night__________...?

(A) Anabatic Wind
(B) Katabatic wind

(C) Lue Wind
(D) None of these

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Disolved oxygen (DO) in water should be...?

(A) 400 to 800 ppm
(B) 4000 to 8000 ppm

(C) 0.4 to 0.5 ppm
(D) 4 to 5 ppm

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The main culprit of greenhouse effect is Carbon dioxide. But which is the second element contributing most to greenhouse effect...?

(A) Nitrogen Dioxide (NO2)
(B) Chlorofluorocarbons (CFCs)

(C) Methane (CH4)
(D) High-fructose corn syrup (HFCs)

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The most densest substance on the Earth is __________....?

(A) Platinum
(B) Copper

(C) Steel
(D) Osmium

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What are Columns in Periodic table called...?

(A) Period
(B) Group

(C) Verticals
(D) Perpendiculars

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Polyethene is ______...?

(A) Oil
(B) Paper

(C) Plastic
(D) Wood

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A body can escape the gravitational pull of the earth if it is thrown up with a velocity of...?

(A) 25 miles per sec
(B) 60 miles per sec

(C) 7 miles per sec
(D) 10 miles per sec

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Larva of butterfly is also called...?

(A) Eggs
(B) Caterpillar

(C) Pupa
(D) Adult

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Which of the following is a transition element...?

(A) Cl
(B) Cu

(C) S
(D) None of these

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Science which deals with the position and movement of heavenly bodies ...?

(A) Astrophysics
(B) Astronomy

(C) Astrology
(D) Astronautics

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