A radioactive element emits a particle from the nucleus of one of its atoms. The particle comprises two protons and two neutrons. The name of this process is called...? Mcqs

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A radioactive element emits a particle from the nucleus of one of its atoms. The particle comprises two protons and two neutrons. The name of this process is called...?

(A) α-emission
(B) β-emission

(C) γ-emission
(D) Nuclear fission

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Evaporation can occur at ____...?

(A) Freezing point
(B) Melting point

(C) Boiling point
(D) All temperatures

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What divides the Earth into the Northern and the Southern Hemispheres...?

(A) Axis of rotation
(B) Equator

(C) North Pole
(D) South Pole

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Which mineral is involved in formation of a hormone that is required to produce energy...?

(A) Copper
(B) Magnesium

(C) Calcium
(D) Iodine

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Kidney disease happens due to overdose of...?

(A) Vitamin A
(B) Vitamin B

(C) Vitamin C
(D) Proteins

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Recapitulation of biogenetic law was given by:...?

(A) Darwin
(B) Lamarck

(C) Haeckel
(D) Mendel

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Electron has a much shorter wavelength than visible light, and this allows electron microscopes to produce _____ images....?

(A) Lower-resolution
(B) Higher-magnification

(C) Equal-resolution
(D) Higher-resolution

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Sound travels in air at an average speed of nearly________ ...?

(A) 1257 miles per hour
(B) 755 miles per hour

(C) 330 miles per hour
(D) None of these

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The amount of energy required by the children of age between one to three years is___________...?

(A) 300 k Calories
(B) 600 k Calories

(C) 900 k Calories
(D) 1200 k Calories

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If order and corresponding element of the matrices are same then matrices are said to be...?

(A) scalar
(B) diagonal

(C) equal
(D) rectangular

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