Approximate age of moon is _________...? Mcqs

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Approximate age of moon is _________...?

(A) 4.51 billion years
(B) 4.55 billion years

(C) 4.53 billion years
(D) 4.57 billion years

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Air contains maximum amount of__________...?

(A) oxygen
(B) nitrogen

(C) hydrogen
(D) carbon dioxide

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Nuclei having the same nuclear charge but different masses are called ____...?

(A) Isobars
(B) Isotopes

(C) Isoelectronic
(D) Isomers

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Who invented the Lever...?

(A) Stephen Hawking
(B) Archimedes

(C) Marie Curie
(D) None

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The main constituent of hemoglobin is___________...?

(A) Chlorine
(B) Iron

(C) Calcium
(D) None of these

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Which one of the following incorrectly shows the types of vertebrates through its examples...?

(A) Reptile → Snake
(B) Bird → Ostrich

(C) Amphibian → Toad
(D) Mammal → Shark

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what is anthracite...?

(A) Carbon
(B) Hard coal

(C) Ammonia
(D) None of these

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Which mineral is the present in meat, onion, eggs, iodized salt and seafood...?

(A) Calcium
(B) Iodine

(C) Magnesium
(D) Copper

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The following are the methods to purify water except...?

(A) Filtration
(B) Distillation

(C) Crystallization
(D) Chlorination

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Which one is the world’s largest mangrove forest(s)...?

(A) Changa Manga Forest
(B) Amazon Forest

(C) Sundarbans Forest
(D) None of the above

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