What is the first element in the periodic table?...? Mcqs

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What is the first element in the periodic table?...?

(i) Hydrogen
(ii) Helium

(iii) Nitrogen
(iv) Carbon

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Biogas produced as a result of anaerobic decay of organic matter consist primarily of __________ gases...?

(i) N₂ & SO2
(ii) NH3 & CO2

(iii) O2 & N₂
(iv) None of these

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The most abundant metal in the Earth's crust is________...?

(i) Iron
(ii) Silicon

(iii) Carbon
(iv) Aluminum

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Which gas is filled in electric bulb...?

(i) Nitrogen
(ii) Oxygen

(iii) Carbon dioxide
(iv) None of these

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The Third Most abundant element is:...?

(i) Oxygen
(ii) Silicon

(iii) Aluminium
(iv) None ofthese

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The most abundant metal in the earth's crust is:...?

(i) Zinc
(ii) Copper

(iii) Aluminum
(iv) Iron

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Which of the following has the maximum density...?

(i) Water
(ii) Ice

(iii) Benzene
(iv) Chloroform

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The most brightest planet is ______...?

(i) Sun
(ii) Mercury

(iii) Venus
(iv) None of these

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Galvanized iron sheets have on the coating of...?

(i) Lead
(ii) Chromium

(iii) Tin
(iv) Zinc

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Which of the following is not a chemical reaction...?

(i) Burning of a paper
(ii) Conversion of Water into stream

(iii) Digestion of food
(iv) Burning of coal

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