If nucleon number of potassium is 39, number of neutrons will be _______...? Mcqs

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If nucleon number of potassium is 39, number of neutrons will be _______...?

(A) 39
(B) 19

(C) 20
(D) 29

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Who is considered the founder of meteorology...?

(A) Aristotle
(B) Plato

(C) Einstein
(D) Newton

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Night vision is possible with the help of ___________...?

(A) Red light
(B) Violet light

(C) Infrared Rays
(D) Ultra violet Light

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The temperature at which water boils depends mainly on ____________...?

(A) Air temperature
(B) Relative humidity

(C) Air pressure
(D) Air density

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When WBCs greatly increased in number, they cause a disease called...?

(A) Anaemia
(B) Leukaemia

(C) Haemophilia
(D) Diarrhoea

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Diameter of Sun is_____________...?

(A) 12 Lakh kms
(B) 13 Lakh kms

(C) 14 Lakh kms
(D) 15 Lakh kms

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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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What is the reason of kinetic energy...?

(A) resistance
(B) motion

(C) object
(D) all of these

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The rear view mirror of a motor vehicle is ________...?

(A) Concave
(B) Plane

(C) Convex
(D) Biconcave

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One of the following ways of expressing the concentration of a solution does not depend on temperature. It is__________...?

(A) Molarity
(B) Molality

(C) Normality
(D) Formality

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