Which one of the following is not a way to reduce friction...? Mcqs

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Which one of the following is not a way to reduce friction...?

(A) Smooth and polishing surfaces
(B) Less contact area

(C) Oil and lubricants
(D) Ball bearing and rollers

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Blue dwarfs’ and ‘Red giants’ respectively refer to:...?

(A) Moons of Jupiter
(B) Young star and Old star

(C) Old star and Young star
(D) None of these

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How many ounces in a kg...?

(A) 28
(B) 30

(C) 33
(D) 35

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Which is the best indication that a chemical reaction has taken place...?

(A) Blue powder turns water blue
(B) Metal budding when placed in an unknown liquid

(C) A white substance dissolving in water
(D) None

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Which month of calendar year can lack a new moon...?

(A) December
(B) February

(C) May
(D) None

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The heaviest naturally-occurring element is_________...?

(A) Radium
(B) Platinum

(C) Uranium
(D) Cadmium

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The density of gases increases when its ______...?

(A) Pressure increased
(B) Temperature increased

(C) Volume increased
(D) None of these

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Members of different species living in specific habitat are called...?

(A) Community
(B) Population

(C) Ecosystem
(D) Biomes

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Triple point of water is _________...?

(A) 271 K
(B) 272.2 K

(C) 273.16 K
(D) None of these

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Which planet is called “red planet”...?

(A) Mars
(B) Venus

(C) Jupiter
(D) Saturn

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