The half life of a radioactive element is 8-days. How long it take to reduce it from 10 mg to 5 mg...? Mcqs

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The half life of a radioactive element is 8-days. How long it take to reduce it from 10 mg to 5 mg...?

(A) 4 days
(B) 12 days

(C) 16 days
(D) 8 days

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What is the major source of release of direct pollutants in air pollution...?

(A) Air
(B) Fuel

(C) Gas
(D) None

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Alzheimer’s disease is a _________ disorder....?

(A) Genetic
(B) Brain

(C) Eye
(D) Body Weight Loss

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Which of the following is a non-luminous object...?

(A) Burning coal
(B) Glassware

(C) Fireworks
(D) Jupiter

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Organisms that eat all the dead and waste products of producers and consumers are called...?

(A) Producers
(B) Consumers

(C) Decomposers
(D) None

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Which one of the following substances traps sunlight...?

(A) Cellulose
(B) Chlorophyll

(C) Cytoplasm
(D) Cell sap

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Silicon is an example of _________...?

(A) No-conductor
(B) Semiconductor

(C) Super Conductor
(D) None of these

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The day and night are formed due to 'Earth' rotation on its axis from...?

(A) North to south
(B) South to North

(C) West to East
(D) East to West

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What does a cylinder measure...?

(A) Length and width
(B) Width and height

(C) Height and diameter
(D) Diameter and circumference

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A fathom is equal to ________feets...?

(A) 6
(B) 5

(C) 4
(D) 3

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