_______________ causes biomagnification problem in the Ecosystem....? Mcqs

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_______________ causes biomagnification problem in the Ecosystem....?

(A) Lead
(B) Mercury

(C) Chromium
(D) Copper

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A nucleotide consists of ____...?

(A) Phosphate
(B) Sugar

(C) Base
(D) All of these

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The heat from Sun reaches to earth in form of waves called _____...?

(A) Conduction
(B) Radiation

(C) Convection
(D) None

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The temperature at which water boils depends mainly on ____________...?

(A) Air temperature
(B) Relative humidity

(C) Air pressure
(D) Air density

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The ozone layer is at height of________kilometers from the surface of the Earth...?

(A) 10 to 20
(B) 20 to 30

(C) 30 to 40
(D) 40 to 50

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Fine organic or inorganic particles suspended in air is called _______________...?

(A) particulate pollutant
(B) gaseous pollutant

(C) aerosol
(D) none of these

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If there is no capillarity...?

(A) It would be impossible to use a kerosene lamp
(B) The blotting paper would fail to function

(C) There would have been no plants on earth
(D) All of above

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Steering of a car involves...?

(A) A single force
(B) Two forces acting in the same direction

(C) Two forces acting along different lines and in opposite direction.
(D) A pair of forces acting along the same line and in opposite direction

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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 cathode ray carry ______...?

(A) Positive charge
(B) Neutral

(C) Negative charge
(D) Positrons

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