The horizontal rows of the periodic table are called ______...? Mcqs

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The horizontal rows of the periodic table are called ______...?

(A) Groups
(B) Periods

(C) Sets
(D) Matrices

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Who enunciated the laws of planetary motion...?

(A) Nicolaus Copernicus
(B) Johannes Kepler

(C) Isaac Newton
(D) Galile

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Which of the following is secreted by liver and stored in the gallbladder...?

(A) Saliva
(B) Bile

(C) Gastric juice
(D) Pancreatic juice

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The altitude on stratosphere is ______...?

(A) 40 to 45 km
(B) 50 to 55 km

(C) 60 to 65 km
(D) 70 to 75 km

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Newton’s Third Law of Motion...?

(A) every action there is an equal and opposite reaction.
(B) attraction or repulsion between two charges

(C) volume of a given mass of gas increases or decreases
(D) temperature remaining constant, volume of a given mass of a gas varies inversely

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The cow’s milk contains how much amount of water in terms of percentage...?

(A) 60%
(B) 65%

(C) 72%
(D) 80%

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Fat provides _______ as much energy as the same amount of carbohydrate....?

(A) Half
(B) Twice

(C) Same
(D) One-quarter

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In a typical H-R diagram, stars are graphed by these two characteristics:...?

(A) Temperature and luminosity
(B) Luminosity and distance

(C) Distance and temperature
(D) Size and distance

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A type of sample machine which is used to move heavy objects up or down over a vertical Height is known as...?

(A) Inclined plane
(B) Layer

(C) Wedge
(D) Fulcrum

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The number of neutron(s) in Protium is ______...?

(A) One
(B) Three

(C) Two
(D) No

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