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

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

(A) N₂ & SO2
(B) NH3 & CO2

(C) O2 & N₂
(D) None of these

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What was the deadline of Kyoto Protocol for CO₂ limit upto 5,86% from 1990s to:...?

(A) 2020
(B) 2004

(C) 2012
(D) None of these

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

(A) Lead
(B) Chromium

(C) Tin
(D) Zinc

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Soap and detergents remove the dirt from clothes due to...?

(A) Capillary action
(B) Osmosis

(C) Diffusion
(D) Lowering of interfacial tension

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A chemical solution has 8% acid the acid is 15 ml the total volume of solution is...?

(A) 179.5 ml
(B) 180.5 ml

(C) 187.5 ml
(D) None of these

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What makes a lemon sour...?

(A) Tartaric acid
(B) Citric acid

(C) Acetic acid
(D) Hydrochloric acid

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Vaccination was discovered by...?

(A) Galileo
(B) Edward Jenner

(C) Baird
(D) Roentgen

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Which is the oldest freezing method:...?

(A) Contact freezing
(B) Flash freezing

(C) Brine freezing
(D) None of these

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When a gas turns into a liquid the process is called:...?

(A) Condensation
(B) Evaporation

(C) Deposition
(D) Sulimation

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Which of the following metals is not only magnetic but also radioactive...?

(A) Thorium
(B) Aluminum

(C) Iron
(D) None of these

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