Chemistry MCQs

A. COD B. DO C. PH D. Salinity The correct answer to the question: “Which one of the following gives the measure of Organic pollution in water?” is “COD”.

A. Source B. Receptor C. Sink D. All of them The correct answer to the question: “The medium which interact with long lived pollutant is:_____________?” is “Sink”.

A. Water pollution B. Sound pollution C. Soil pollution D. Air pollution  The correct answer to the question: “Cyclone collector is used for minimizing:____________-?” is “Air pollution “.

A. DDT B. mercury salt C. Domestic waste D. Aluminum foil The correct answer to the question: “Biodegradable pollutant is:_____________?” is “Domestic waste”.

A. only salt B. Organic matter C. Salt & Organic matter D. Suspended impurity The correct answer to the question: “Surface water contains:_____________?” is “Organic matter”.

A. Free radicals B. Cosmic rays C. Nitrogen oxides  D. UV -rays The correct answer to the question: “Ozone is formed in the upper layer of the atmosphere from oxygen by action of:____________?” is “UV -rays”.

A. Hg, Pb B. Zn, Mn C. As, CD D. Cd , Pb The correct answer to the question: “which of the following pair is not distinguished by passing H2S?” is “Hg, Pb”.

A. Alum B. Chlorine C. Lime D. permangnate The correct answer to the question: “The phosphate present in sewage water which cause eutrophication Can be removed by adding:” is “Lime”.

A. Mordent dye B. Vat dye C. Acid dye  D. Direct dye The correct answer to the question: “The most useful dye for those fabric which can form hydrogen bonds is:_____________?” is “Direct dye”.

A. As water purifier B. As mordant  C. fire proofing fabrics D. Softening of hard water The correct answer to the question: “Alum is used by dyers of cloth:” is “As mordant “.