By which process copper is refined ____________...? Mcqs

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By which process copper is refined ____________...?

(A) Roasting
(B) Oxidation

(C) Zone Refining
(D) Electrolysis

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According to the theory of relativity, which of the following always remains constant ...?

(A) Length of an object
(B) Time

(C) Space
(D) Velocity of light

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Sound travels fastest in _______...?

(A) Air
(B) Water

(C) Diamond
(D) Steel

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Calcium level in the blood is regulated by the: ___________...?

(A) Thyroid
(B) Parathyroid

(C) Adrenal medulla
(D) A and B

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Which of the following does not pollute the air...?

(A) Nitrogen Dioxide
(B) Sulfur dioxide

(C) Carbon dioxide
(D) none of these

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Law of independent Assortment was given by :...?

(A) Gregor Mendal
(B) fariady

(C) Mendala
(D) None

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Television signals are converted into light signals by___________...?

(A) Optical fiber
(B) Transistor

(C) Decoder
(D) Photo diode

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Frederick Sanger is a twice recipient of the Nobel Prize for ________...?

(A) Physics in 1956 and 1972
(B) Chemistry in 1958 and 1980

(C) Physics in 1903 and Chemistry in 1911
(D) Chemistry in 1954 and Peace in 1962

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Which two organs glands are affected by malaria...?

(A) Lungs and heart
(B) Spleen and liver

(C) Kidneys and lungs
(D) Heart and brain

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Radioactivity was discovered by __________...?

(A) Kelvin
(B) Thomson

(C) Rutherford
(D) Bacquerel

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