Which isotope is used to study the uptake of phosphorus containing fertilizers...? Mcqs

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Which isotope is used to study the uptake of phosphorus containing fertilizers...?

(A) Phosphorus - 32
(B) Carbon - 14

(C) Lead - 210
(D) Nitrogen - 15

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Refrigerator works on the phenomenon of ________ of heat transfer....?

(A) Conduction
(B) Convection

(C) Radiation
(D) All of these

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The main Constituent of Biogas is__________...?

(A) Methane
(B) Hydrogyn

(C) Oxygen
(D) Carbin dioxide

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If the ratio of solute to solvent is high, the solution is said to be ______...?

(A) Aqueous Solution
(B) Unsaturated Solution

(C) Concentrated Solution
(D) Saturated Solution

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Vacuum tubes have been replaced by__________...?

(A) Conductors
(B) Diodes

(C) Transistors
(D) None of these

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Which chamber of human heart pumps fully oxygenated blood to aorta and hence to the body:...?

(A) Right Auricle
(B) Left Auricle

(C) Right Ventricle
(D) Left Ventricle

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How many numbers of chromosomes in Pea plant...?

(A) 12
(B) 14

(C) 46
(D) 48

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If the length of a heater coil is reduced by 10% of its original length, then Power consumed by heater will...?

(A) Increase over 10%
(B) Decrease by 10%

(C) Decrease by 0.5%
(D) Increase by 0.5%

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Following are the constituent of polluted air cause of Acid rain except...?

(A) Argon
(B) Nitrogen

(C) Sulphur dioxide
(D) Oxygen

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1 nanometer = ...?

(A) 10-3 meter
(B) 10-6 meter

(C) 10-9 meter
(D) 10-12 meter

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