What is an example of a synthesis reaction...? Mcqs

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What is an example of a synthesis reaction...?

(A) Water decomposing into Hydrogen and Oxygen
(B) Carbon combining with Oxygen to form Carbon Monoxide

(C) Nitrogen and Oxygen combining to form Nitrogen Dioxide
(D) Hydrogen and Oxygen combining to form water

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According to World Health Organization (WHO), the industrial limit of sound in the industries must be...?

(A) 80 dB
(B) 75 dB

(C) 85 dB
(D) 100 dB

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In a mercury thermometer, what is the range of the linear scale that the mercury rises in the tube...?

(A) 35°C - 42°C
(B) 20°C - 30°C

(C) 50°C - 60°C
(D) 80°C - 90°C

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Which among the following is a good conductor of heat...?

(A) Wood
(B) Plastic

(C) Paper
(D) Copper

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Rainbow is the best example of _____...?

(A) Refraction of light
(B) Dispersion of light

(C) Spectrum of white light
(D) Reflection of light

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Frog eggs are also called...?

(A) Spawn
(B) Froglet

(C) Tadpoles
(D) Adult

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Which of the following is not the base quantity/quantities...?

(A) Length
(B) Mass

(C) Time
(D) Acceleration

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About 50% of the Earth’s crust, including the waters on the Earth and atmosphere, is...?

(A) Oxygen
(B) Cabon Dioxide

(C) Silicon
(D) Clay

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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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Diamond is an allotropic form of_______...?

(A) Carbon
(B) Hydrogen

(C) Nitrogen
(D) Silicon

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