4th and 5th period in periodic table are known as...? Mcqs

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4th and 5th period in periodic table are known as...?

(A) Short period
(B) Long period

(C) Normal period
(D) Very long period

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The movement of free electrons is called ____...?

(A) Electric Field
(B) Electric Potential

(C) Electric Current
(D) Electric Charge

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A substance which produces hydrogen ion (H+) in the aqueous solution is called...?

(A) Base
(B) Acid

(C) Oxidizing agent
(D) Reducing agent

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What is the frequency formula...?

(A) check in details
(B) empty

(C) empty
(D) empty

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In the normal human eye, the image is formed ______...?

(A) In from of the retina
(B) On the retina

(C) Behind the retina
(D) In between lens and retina

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NASA’s ________ rover landed on Mars in February 2021....?

(A) Persistence
(B) Desistance

(C) Perseverance
(D) None of the above

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The Planet of the solar system which has Maximum number of moons is___________...?

(A) Jupiter
(B) Venus

(C) Saturn
(D) Uranus

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The atmospheric greenhouse effect is produced mainly by the __________________...?

(A) Absorption and re-emission of visible light by the atmosphere
(B) Absorption and re-emission of ultraviolet radiation by the atmosphere

(C) Absorption and re-emission of infrared radiation by the atmosphere
(D) Absorption and re-emission of visible light by clouds

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Which mineral is essential for building bones and teeth, muscle functioning and blood clotting...?

(A) Calcium
(B) Magnesium

(C) Iron
(D) Sodium

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How long does the Earth take to complete one rotation...?

(A) 23 hours 59 minutes 59 seconds
(B) 24 hours 00 minutes 00 seconds

(C) 23 hours 56 minutes 04 seconds
(D) 24 hours 01 minutes 01 seconds

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