Vertical columns in the periodic table of elements are called as__________...? Mcqs

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Vertical columns in the periodic table of elements are called as__________...?

(A) Periods
(B) Groups

(C) Rows
(D) Lanthanoids series

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An atom of an element has 11 protons, 11 electrons and 12 neutrons. The atomic mass of an atom is...?

(A) 11
(B) 12

(C) 22
(D) 23

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Exposure to sunlight helps a person improve his health because ________...?

(A) Resistance power increases
(B) The infrared light kills bacteria in the body

(C) The ultraviolet rays convert skin oil into Vitamin D
(D) The pigment cells in the skin get stimulated and produce a healthy tan

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The process of sublimation _______...?

(A) A solid turns directly into a liquid
(B) A liquid turns directly into a gas

(C) A gas turns directly into a liquid
(D) A solid turns directly into a gas

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The sun has a __________ year solar cycle during which its activity increases and decreases....?

(A) 10
(B) 11

(C) 12
(D) 13

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Winter Solstice means____________...?

(A) longest night
(B) longest day

(C) smallest night
(D) smallest day

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In modern periodic table, how many periods are there...?

(A) 7
(B) 8

(C) 9
(D) 6

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Gales occur when the wind moves at the speed of _____ ...?

(A) 35 km/h
(B) 55 km/h

(C) 75 km/h
(D) 100 km/h

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One Gross is equal to___________...?

(A) 5 Dozen
(B) 10 Dozen

(C) 12 Dozen
(D) None of them

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Pneumatic systems is (are) used in ______...?

(A) Spray guns
(B) Pumps

(C) Vacuum cleaner
(D) Dental drill or dentistry tools

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