The main constituent of Pearls are: ______________...? Mcqs

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The main constituent of Pearls are: ______________...?

(A) Calcium oxide &Ammonium Chloride
(B) Calcium Carbonate &Megnesium Carbonate

(C) Aragonite & Conchiolin
(D) None of these

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How does the Navstar GPS work for different applications (5)...?

(A) see the answer
(B) empty

(C) empty
(D) empty

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The most suitable thermometer for measuring boiling point of water is ...?

(A) Mercury Thermometer
(B) Liquid crystal thermometer

(C) Bimetallic thermometer
(D) Alcohol thermometer

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At night, Plants intake __________ and release __________...?

(A) Oxygen – Carbon dioxide
(B) Carbon dioxide – Oxygen

(C) Oxygen – Carbon monoxide
(D) None of theseCarbon monoxide – Oxygen

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Which part of the atmosphere are you breathing right now...?

(A) Bathysphere
(B) Stratosphere

(C) Troposphere
(D) Lonosphere

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Who invented the safety pin...?

(A) Charles Goodbye
(B) steward Harshone

(C) Walter Hunt
(D) A.Rose

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Which of the following is nutritional deficiency disease...?

(A) Albinism
(B) Cirrhosis

(C) Rabies
(D) Pellagra

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Two similar chromosomes in a cell which are similar in shape, size and position of centromere called _______...?

(A) Chromatids
(B) Arms

(C) Homologous
(D) Homology

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Soil pollution is caused by...?

(A) Aerosol
(B) Ozone

(C) Acid rain
(D) All of these

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Carbon dioxide was discovered by_______...?

(A) Niels Bohr
(B) Amedeo Avogadro

(C) Joseph Black
(D) None of Above

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