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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A camera uses a __________ to form an image....?

(A) convex lens
(B) concave lens

(C) condenser lens
(D) none of these

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Wood is the main raw material for the manufacture of ____________...?

(A) Paint
(B) Gun powder

(C) Paper
(D) Ink

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Which of the following have maximum calorific value...?

(A) Carbohydrates
(B) Fats

(C) Proteins
(D) Vitamins

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How many bones are there in a newly born infant...?

(A) 206
(B) 230

(C) 280
(D) 300

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Fuse wire is made of_____________...?

(A) 63% tin and 37% lead
(B) 63% lead and 37% tin

(C) 63% tin and 37% aluminum
(D) 63% lead and 37% aluminum

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The heaviest naturally-occurring element is_________...?

(A) Radium
(B) Platinum

(C) Uranium
(D) Cadmium

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Coleoptile is a structure found in _____...?

(A) Maize Seed
(B) Bean Seed

(C) Both A and B
(D) None

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Aphasia is the inability to do what...?

(A) Walk
(B) Communicate

(C) Study
(D) Bath

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Naturally occurring enzyme used as a defense chemical by bacteria ______...?

(A) Defense protein
(B) Restriction enzyme

(C) Hydrolytic enzyme
(D) Ligase enzyme

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