MCQOPTIONS
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MCQOPTIONS
This section includes 28 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following is not a heavy industry? |
| A. | Iron |
| B. | Fertilizer |
| C. | Paper |
| D. | None |
| Answer» E. | |
| 2. |
Which of the following is a macronutrient? |
| A. | Boron |
| B. | Iron |
| C. | Copper |
| D. | Carbon |
| Answer» E. | |
| 3. |
Residence time of methane in the atmosphere is |
| A. | 3 - 7 days |
| B. | 2 -3 days |
| C. | 3 - 7 years |
| D. | 2 - 3 years |
| Answer» D. 2 - 3 years | |
| 4. |
Three elements needed for the healthy growth of plants are |
| A. | N P K |
| B. | N K C |
| C. | N S P |
| D. | N Ca P |
| Answer» B. N K C | |
| 5. |
Requirement of macronutrient per acre of the land is |
| A. | 5 to 200 kg |
| B. | 20-200 kg |
| C. | 200-400 kg |
| D. | 30-400 kg |
| Answer» B. 20-200 kg | |
| 6. |
Which of the following is not a secondary pollutant |
| A. | Ozone |
| B. | Carbonic acid |
| C. | Sulphuric acid |
| D. | Carbon dioxide |
| Answer» E. | |
| 7. |
Major cause of SO2 on global scale is |
| A. | Volcanoes |
| B. | Electric sparks |
| C. | Combustion |
| D. | All |
| Answer» B. Electric sparks | |
| 8. |
The yellow colour in photochemical smog is due to presence of |
| A. | Dinitrogen oxide |
| B. | Nitrogen dioxide |
| C. | Chlorine gas |
| D. | Chlorine dioxide |
| Answer» C. Chlorine gas | |
| 9. |
Hypochlorous acid is used for disinfecting the water it reacts with the dissolved ammonia producing |
| A. | NH2Cl |
| B. | NHCI2 |
| C. | NCI2 |
| D. | All of the above |
| Answer» E. | |
| 10. |
Incineration of muncipal waste is carried out in the temperature range of |
| A. | 250 to 500?C |
| B. | 500 to 900?C |
| C. | 950 to 1300?C |
| D. | 900 to 1000?C |
| Answer» E. | |
| 11. |
Which of the following is not a condition for the formation of smog? |
| A. | Sufficient NO |
| B. | Sunlight |
| C. | Less movement of air |
| D. | Winds |
| Answer» E. | |
| 12. |
In which of the following layer of atmosphere there is more thickness of ozone layer? |
| A. | Troposphere |
| B. | Stratosphere |
| C. | Mesosphere |
| D. | Photosphere |
| Answer» C. Mesosphere | |
| 13. |
Which of the following is not primary pollutant |
| A. | SO3 |
| B. | CO |
| C. | NO |
| D. | H2SO4 |
| Answer» E. | |
| 14. |
Which of the following air pollutants is more dangerous for ozone layer? |
| A. | CFC |
| B. | CO2 |
| C. | CO |
| D. | Oxides of nitrogen |
| Answer» B. CO2 | |
| 15. |
Which of the following gases is the main cause of acid rain? |
| A. | CO |
| B. | NO2 |
| C. | Both a & b |
| D. | None of the above |
| Answer» C. Both a & b | |
| 16. |
Which of the following factors help to measure quallity of water? |
| A. | DO |
| B. | BOD |
| C. | COD |
| D. | All of the above |
| Answer» E. | |
| 17. |
In the purification of portable water the coagulant used is |
| A. | Alum |
| B. | Nickel sulphate |
| C. | Copper sulphate |
| D. | Barium sulphate |
| Answer» B. Nickel sulphate | |
| 18. |
Newspaper can be recycled again and again how many times? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» E. | |
| 19. |
The main pollutant of leather tanneries in the waste water is |
| A. | Chromium III |
| B. | Chromium IV |
| C. | Chromium V |
| D. | Chromium VI |
| Answer» C. Chromium V | |
| 20. |
A single chlorine free radical can destroy how many ozone molecules? |
| A. | 10 |
| B. | 100 |
| C. | 10000 |
| D. | 100000 |
| Answer» E. | |
| 21. |
Which substance can be used for disinfecting water? |
| A. | KMnO4 |
| B. | Alums |
| C. | Ozone |
| D. | All |
| Answer» B. Alums | |
| 22. |
Chlorination of water may be harmful if the water contains |
| A. | Ammonia |
| B. | Dissolved oxygen |
| C. | Carbon dixide |
| D. | All |
| Answer» B. Dissolved oxygen | |
| 23. |
Which one of the following makes the bulk of hydrospheres content? |
| A. | Oceans |
| B. | Glaciers & icecaps |
| C. | Fresh water lakes and ponds |
| D. | All have equal distribution |
| Answer» B. Glaciers & icecaps | |
| 24. |
Which of the following is used as water disinfectant to avoid the formation of toxic compounds |
| A. | Cl2 |
| B. | O3 |
| C. | ClO2 |
| D. | Both b & c |
| Answer» E. | |
| 25. |
The percentage of suspended solid waste in raw water is removed by coagulation is |
| A. | 60 |
| B. | 70 |
| C. | 80 |
| D. | 90 |
| Answer» D. 90 | |
| 26. |
Ozone hole is substantial depletion of ozone in every year during |
| A. | Aug - Nov |
| B. | Sep - Nov |
| C. | Nov - Dec |
| D. | Dec - Jan |
| Answer» C. Nov - Dec | |
| 27. |
The main product of bacterial action is |
| A. | Nox |
| B. | NO2 |
| C. | N2O3 |
| D. | NO |
| Answer» E. | |
| 28. |
Pollutants have adverse effect over |
| A. | Biosphere |
| B. | Ecosystem |
| C. | Both a & b |
| D. | Hydrosphere |
| Answer» C. Both a & b | |