What is the main component of bones and teeth...? Mcqs

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What is the main component of bones and teeth...?

(A) Calcium carbonate
(B) Calcium phosphate

(C) Calcium sulphate
(D) Calcium nitrate

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An iron nail/steel rod can be magnetize by...?

(A) By passing an electric current around it
(B) By heating it on a high flame

(C) By hammering
(D) By keeping it with an iron rod

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Water has been discovered on which potentially habitable super-Earth ...?

(A) K2-14d
(B) K2-15c

(C) K2-13a
(D) K2-18b

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A thick permeable layer around the plant cell is called...?

(A) Cell Wall
(B) Cytoplasm

(C) Cell Membrane
(D) None

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Which vitamin is most soluble in water...?

(A) Vitamin D
(B) Vitamin B

(C) Vitamin C
(D) Both B and C

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Fan was invented by___________...?

(A) Arthur Schimit
(B) Alfered Nobel

(C) Skaats Wheeler
(D) None of these

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The season changes because of the ____________...?

(A) Moon is revolving round the earth
(B) Earth is revolving round its axis

(C) Earth is revolving round the sun
(D) Planet Mars is attracting the sun

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Law of conservation of mass was given by ____...?

(A) Antoine Lavoisier
(B) Joseph Black

(C) Mikhail Lomonosov
(D) Jean Stas

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Which salts are excessively dissolved to make temporary hard water...?

(A) CaSO4 and CaCl2
(B) KNO3 and KOH

(C) CaCO3 and Ca(OH)2
(D) Ca(HCO3)2 and Mg(HCO3)2

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Which diagnostic scan gives some of the highest radiation doses in diagnostic radiography ...?

(A) CT-Scan
(B) Ultrasound

(C) MRI
(D) X-Ray

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