MCQOPTIONS
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MCQOPTIONS
This section includes 36 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The non-viable particulate is among the following is |
| A. | Dust |
| B. | Bacteria |
| C. | Moulds |
| D. | Fungi |
| Answer» B. Bacteria | |
| 2. |
Which of the following statements is not true about classical smog? |
| A. | Its main components are produced by the action of sunlight on emissions of automobiles and factories. |
| B. | Produced in cold and humid climate. |
| C. | It contains compounds of reducing nature. |
| D. | It contains smoke fog and sulphur dioxide |
| Answer» B. Produced in cold and humid climate. | |
| 3. |
The substance having the largest concentration in acid rain? |
| A. | \[{{H}_{2}}C{{O}_{3}}\] |
| B. | \[HN{{O}_{3}}\] |
| C. | \[HCL\] |
| D. | \[{{H}_{2}}S{{O}_{4}}\] |
| Answer» E. | |
| 4. |
Presence of which of the following fuel gas in the exhaust fumes shows incomplete combustion of fuel? |
| A. | Sulphur dioxide |
| B. | Carbon monoxide and water vapour |
| C. | Carbon monoxide |
| D. | Nitrogen dioxide |
| Answer» D. Nitrogen dioxide | |
| 5. |
Which among the following statements is falser |
| A. | Oil slick in sea water increases D.O. value |
| B. | The main reason for river water pollution is industrial and domestic sewage discharge |
| C. | Surface water contains a lot of organic matter mineral nutrients and radioactive materials |
| D. | Oil spill in sea water causes heavy damage to fishery |
| Answer» B. The main reason for river water pollution is industrial and domestic sewage discharge | |
| 6. |
Eutrophication causes reduction in |
| A. | dissolved oxygen |
| B. | nutrients |
| C. | dissolved salts |
| D. | All of these |
| Answer» B. nutrients | |
| 7. |
BOD is connected with |
| A. | microbes and organic matter |
| B. | organic matter |
| C. | microbes |
| D. | None of these |
| Answer» B. organic matter | |
| 8. |
Minamata disease is due to pollution of |
| A. | aresenic into the atmosphere |
| B. | organic waste into drinking water |
| C. | oil spill in water |
| D. | industrial waste mercury into fishing water |
| Answer» E. | |
| 9. |
Which of the following statements about polar stratosphere clouds (PSCs) is not correct? |
| A. | PSCs do not react with chlorine nitrate and HCL |
| B. | Type I clouds are formed at about \[-\,77{}^\circ C\] and contain solid \[HN{{O}_{3}}.3{{H}_{2}}O\] |
| C. | Type II clouds are formed at about \[-\,85{}^\circ C\]and contain some ice |
| D. | A tight whirlpool of wind called Polar Vortex is formed which surrounds Antarctica |
| Answer» B. Type I clouds are formed at about \[-\,77{}^\circ C\] and contain solid \[HN{{O}_{3}}.3{{H}_{2}}O\] | |
| 10. |
Which of the following is not involved in the formation of photochemical smog? |
| A. | Hydrocarbon |
| B. | NO |
| C. | \[S{{O}_{2}}\] |
| D. | \[{{O}_{3}}\] |
| Answer» D. \[{{O}_{3}}\] | |
| 11. |
The greatest affinity for haemoglobin is shown by which of the following: |
| A. | NO |
| B. | CO |
| C. | \[{{O}_{2}}\] |
| D. | \[C{{O}_{2}}\] |
| Answer» B. CO | |
| 12. |
The substance which is not regarded as a pollutant? |
| A. | \[N{{O}_{2}}\] |
| B. | \[C{{O}_{2}}\] |
| C. | \[{{O}_{3}}\] |
| D. | Hydrocarbons |
| Answer» C. \[{{O}_{3}}\] | |
| 13. |
Which of the following gases is not a greenhouse gas? |
| A. | CO |
| B. | \[{{O}_{3}}\] |
| C. | \[C{{H}_{4}}\] |
| D. | \[{{H}_{2}}O\] vapour |
| Answer» B. \[{{O}_{3}}\] | |
| 14. |
Which of the following is not a consequence of greenhouse effect? |
| A. | Climatic conditions will be changed |
| B. | Plants in warmer climates with adequate rainfall would grow faster |
| C. | The incidence of infectious diseases is likely to increase |
| D. | Malaria will be controlled as the mosquitoes will not survive. |
| Answer» E. | |
| 15. |
The pollutants which came directly in the air from sources are called primary pollutants. Primary pollutants are sometimes converted into secondary pollutants. Which of the following belongs to secondary air pollutants? |
| A. | CO |
| B. | Hydrocarbon |
| C. | Peroxyacetyl nitrate |
| D. | NO |
| Answer» D. NO | |
| 16. |
The gas leaked from a storage tank of the Union Carbide plant in Bhopal gas tragedy was |
| A. | Methyl isocyanate |
| B. | Methylamine |
| C. | Ammonia |
| D. | Phosgene |
| Answer» B. Methylamine | |
| 17. |
What is DDT among the following? |
| A. | Greenhouse gas |
| B. | A fertilizer |
| C. | Biodegradable pollutant |
| D. | Non-biodegradable pollutant |
| Answer» E. | |
| 18. |
Identify the incorrect statement from the following. |
| A. | Ozone absorbs the intense ultraviolet radiation of the sun. |
| B. | Depletion of ozone layer is because of its chemical reactions with chlorofluoro alkanes. |
| C. | Ozone absorbs infrared radiation. |
| D. | Oxides of nitrogen in the atmosphere can cause the depletion of ozone layer. |
| Answer» D. Oxides of nitrogen in the atmosphere can cause the depletion of ozone layer. | |
| 19. |
Green chemistry means such reasons which |
| A. | produce colour during reactions |
| B. | reduce the use and production of hazardous chemicals |
| C. | are related to the depletion of ozone layer |
| D. | study the reactions in plants |
| Answer» C. are related to the depletion of ozone layer | |
| 20. |
Which of the following is/are the hazardous pollutant(s) present in automobile exhaust gases? (i) \[{{N}_{2}}\], (ii) CO (iii) \[C{{H}_{4}}\] (iv) Oxides of nitrogen |
| A. | (ii) and (iii) |
| B. | (i) and (ii) |
| C. | (ii) and (iv) |
| D. | (i) and (iii) |
| Answer» D. (i) and (iii) | |
| 21. |
The greenhouse effect is because of the |
| A. | presence of gases, which in general are strong infrared absorbers, in the atmosphere |
| B. | presence of \[C{{O}_{2}}\]only in the atmosphere |
| C. | pressure of \[{{O}_{3}}\] and \[C{{H}_{4}}\] in the atmosphere |
| D. | \[{{N}_{2}}O\] and chlorofluorohydrocarbons in the atmosphere |
| Answer» B. presence of \[C{{O}_{2}}\]only in the atmosphere | |
| 22. |
The type of pollution caused by spraying of DDT |
| A. | Air and soil |
| B. | Air and water |
| C. | Air |
| D. | Air, water and soil |
| Answer» E. | |
| 23. |
Phosphate pollution is caused by |
| A. | sewage and agricultural fertilizers |
| B. | weathering of phosphate rocks only |
| C. | agriculutral fertilizers only |
| D. | phosphate rocks and sewage |
| Answer» B. weathering of phosphate rocks only | |
| 24. |
Photochemical smog occurs in warm, dry and sunny climate. One of the following is not amongst the components of photochemical smog, identify it. |
| A. | \[N{{O}_{2}}\] |
| B. | \[{{O}_{3}}\] |
| C. | \[S{{O}_{2}}\] |
| D. | Unsaturated hydrocarbon |
| Answer» D. Unsaturated hydrocarbon | |
| 25. |
Which raw material is used in the preparation of soft glass? [NDA] |
| A. | \[{{K}_{2}}C{{O}_{3}},Si{{o}_{2}},CaC{{O}_{3}}\] |
| B. | \[{{K}_{2}}C{{O}_{3}},Si{{O}_{2}},PbC{{O}_{3}}\] |
| C. | \[N{{a}_{2}}C{{O}_{3}},Si{{O}_{2}},CaC{{O}_{3}}\] |
| D. | \[N{{a}_{2}}C{{O}_{3}},Si{{O}_{2}},PbO\] |
| Answer» D. \[N{{a}_{2}}C{{O}_{3}},Si{{O}_{2}},PbO\] | |
| 26. |
Which of the following chemicals is used in foam fire extinguishers? [NDA] |
| A. | Aluminium sulphate |
| B. | Copper sulphate |
| C. | Cobalt sulphate |
| D. | Nickel sulphate |
| Answer» B. Copper sulphate | |
| 27. |
Which fertilizer is assimilated directly by the plant? [NDA] |
| A. | Super phosphate |
| B. | Nitrolim |
| C. | Muriate of Potash |
| D. | Humus |
| Answer» D. Humus | |
| 28. |
Minimata disease is a pollution-related disease, which results from - |
| A. | release of human organic waste into drinking water |
| B. | release of industrial waste mercury into fishing water |
| C. | accumulation of arsenic into atmosphere |
| D. | oil spills into sea |
| Answer» C. accumulation of arsenic into atmosphere | |
| 29. |
A green house |
| A. | is an enclosure of glass in which plants are kept to protect them from cold air outside |
| B. | is that "body" which allows the short wavelength incoming solar radiation to enter in, but does not allow long wavelength outgoing infra-red radiations to escape out |
| C. | both the above |
| D. | none of the above |
| Answer» D. none of the above | |
| 30. |
Which of the following is the major cause of global warming? |
| A. | Re-radiation of U.V. rays by \[C{{O}_{2}}\] and \[{{H}_{2}}O\] |
| B. | Re-radiation of I.R. rays by \[C{{O}_{2}}\] and \[{{H}_{2}}O\] |
| C. | Re-radiation of I.R. rays by \[{{O}_{2}}\] and \[{{N}_{2}}\] |
| D. | Re-radiation of U.V. rays by \[{{O}_{2}}\] and \[{{N}_{2}}\] |
| Answer» C. Re-radiation of I.R. rays by \[{{O}_{2}}\] and \[{{N}_{2}}\] | |
| 31. |
Which one of the following is used as an explosive? [IAS Prelim] |
| A. | Phosphorus trichloride |
| B. | Mercuric oxide |
| C. | Graphite |
| D. | Nitro-glycerine |
| Answer» E. | |
| 32. |
Consider the following chemicals: [IAS Prelim] 1. Benzene 2. Carbon tetrachloride 3. Sodium carbonate 4. Trichloroethylene Which of the above/is are used as dry cleaning chemical? |
| A. | 1 only |
| B. | 2 only |
| C. | 1, 2 and 4 only |
| D. | 1, 2, 3 and 4 |
| Answer» D. 1, 2, 3 and 4 | |
| 33. |
Which one of the following is another name of RDX? [IAS Prelim] |
| A. | Cyanohydrin |
| B. | Dextran |
| C. | Cyclohexane |
| D. | Cyclonite |
| Answer» E. | |
| 34. |
Which one of the following polymeric materials is used for making bullet proof jacket? [CDS] |
| A. | Nylon-6, 6 |
| B. | Rayon |
| C. | Kevlar |
| D. | Dacron |
| Answer» D. Dacron | |
| 35. |
Which one of the following is used as a mordant in dyeing and tanning industry? [CDS] |
| A. | Magnesium oxide |
| B. | Magnesium carbonate |
| C. | Magnesium chloride |
| D. | Magnesium sulphate |
| Answer» B. Magnesium carbonate | |
| 36. |
Which one of the following substances is used in the manufacture of safety matches? [CDS] |
| A. | Red phosphorus |
| B. | White phosphorus |
| C. | Phosphorus trioxide (P203) |
| D. | Black phosphorus |
| Answer» B. White phosphorus | |