Which of the following gases do plants and trees give out during photosynthesis...? Mcqs

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Which of the following gases do plants and trees give out during photosynthesis...?

(A) Hydrogen
(B) Nitrogen

(C) Oxygen
(D) Carbon dioxide

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Coal, gas and oil are all examples of _____...?

(A) Tidal energy
(B) Nuclear energy

(C) Fossil fuel energy
(D) Biomass energy

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The container use to grow bacteria on large scale are called...?

(A) Chillers
(B) Sterilizers

(C) Fermenters
(D) Ferments

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what are stars mainly made of ...?

(A) Balls of gass
(B) Rock

(C) Ice
(D) Light

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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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A thermos flask keeps things close to their original temperature by reducing ____...?

(A) Conduction
(B) Convection

(C) Radiation
(D) All of these

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Severe deficiency of Vitamin D results in __________....?

(A) scurvy
(B) rickets

(C) night blindness
(D) None of these

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Fats are found in following except...?

(A) Oil
(B) Margarine

(C) Vegetables
(D) Nuts

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Which of the following has the largest wavelength...?

(A) visible light
(B) x-rays

(C) infrared light
(D) ultraviolet radiation

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In order to prevent the corrosion of iron pipes they are often coated with a layer of zinc. This process is termed as____________...?

(A) Electroplating
(B) Annealing

(C) Galvanization
(D) Vulcanization

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