MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The poisonous gas accidentally released in Bhopal Gas Tragedy is |
| A. | Methane |
| B. | Nitrous Oxide |
| C. | Methyl Isocyanate |
| D. | Cyanogen |
| Answer» D. Cyanogen | |
| 2. |
The process of conversion of sugar to alcohol is called |
| A. | Moulding |
| B. | Infection |
| C. | Fermentation |
| D. | Alcohol fixation |
| Answer» D. Alcohol fixation | |
| 3. |
The principal quantum number indicates what property of an electron? |
| A. | energy of electron |
| B. | distance of electron from nucleus |
| C. | both a & b |
| D. | number of subshells |
| Answer» D. number of subshells | |
| 4. |
The phosphorus cycle differs from the biogeochemical cycles in that |
| A. | does not have atmospheric reservoir |
| B. | uses water more |
| C. | have atmospheric reservoir |
| D. | None of the above |
| Answer» B. uses water more | |
| 5. |
The pH of a solution, whose hydrogen ion concentration is 1 x 10 mole per litre, will be ____. |
| A. | 7 |
| B. | 5 |
| C. | 4 |
| D. | 6 |
| Answer» C. 4 | |
| 6. |
The pH of pure water is nearly 7.It will increase on the addition of |
| A. | ammonia |
| B. | cane sugar |
| C. | common salt |
| D. | hydrochloric acid |
| Answer» B. cane sugar | |
| 7. |
The pH value increase from 7 to 14 represents a |
| A. | decrease in H+ ion concentration |
| B. | decrease in OH- ion concentration |
| C. | increase in OH- ion concentration |
| D. | increase in H+ ion concentration |
| Answer» D. increase in H+ ion concentration | |
| 8. |
The pH value of a sample of multiple-distilled water is |
| A. | zero |
| B. | 14 |
| C. | very near to zero |
| D. | very near to seven |
| Answer» E. | |
| 9. |
The percentage of carbon in CO2 is |
| A. | 12 |
| B. | 44 |
| C. | 14 |
| D. | 27.3 |
| Answer» E. | |
| 10. |
The PCl5 molecule has trigonal bipyramidal structure. Therefore,the hybridization of p orbitals should be |
| A. | sp2 |
| B. | sp3 |
| C. | dsp2 |
| D. | dsp3 |
| Answer» E. | |
| 11. |
The pH of a solutiion is 3. When its pH changes to 6, then H+ ion concentration |
| A. | increases 2 times |
| B. | increases 3 times |
| C. | decreases 1000 times |
| D. | decreases 100 times |
| Answer» D. decreases 100 times | |
| 12. |
The percentage of nitrogen in the air is about |
| A. | 0.74 |
| B. | 0.76 |
| C. | 0.78 |
| D. | 0.8 |
| Answer» D. 0.8 | |
| 13. |
The passage of an electric current through a conducting liquid causes ___________. |
| A. | Galvanisation |
| B. | Evaporation |
| C. | Physical Reaction |
| D. | Chemical Reaction |
| Answer» E. | |
| 14. |
The particle with 13 protons and 10 electrons is |
| A. | Al -atom |
| B. | Al3+ ion |
| C. | nitrogen isotope |
| D. | None of these |
| Answer» C. nitrogen isotope | |
| 15. |
The ore which is found in abundance in India is |
| A. | fluorspar |
| B. | magnetite |
| C. | monazite |
| D. | bauxite |
| Answer» D. bauxite | |
| 16. |
The only non-metal which is liquid at room temperature is |
| A. | Mercury |
| B. | Bromine |
| C. | Chlorine |
| D. | Gallium |
| Answer» C. Chlorine | |
| 17. |
The oldest known organic compound is |
| A. | Urea |
| B. | Methane |
| C. | Acetic acid |
| D. | Benzene |
| Answer» D. Benzene | |
| 18. |
The oceanic crust mainly consists of silica and __________. |
| A. | magnesium |
| B. | iron |
| C. | manganese |
| D. | sulphur |
| Answer» B. iron | |
| 19. |
The number of neutrons present in a nitrogen atom is ___. |
| A. | 14 |
| B. | 7 |
| C. | 11 |
| D. | 5 |
| Answer» C. 11 | |
| 20. |
The number of neutrons in dipositive Zinc ion is |
| A. | 34 |
| B. | 36 |
| C. | 38 |
| D. | 40 |
| Answer» E. | |
| 21. |
The number of valence electrons in an atom of Phosphorous is |
| A. | 4 |
| B. | 3 |
| C. | 2 |
| D. | 5 |
| Answer» E. | |
| 22. |
The number of free electrons in the outermost shell of carbon atoms in diamand is |
| A. | zero |
| B. | two |
| C. | four |
| D. | three |
| Answer» B. two | |
| 23. |
The number of electrons that can be accommodated in the M shell is |
| A. | 18 |
| B. | 8 |
| C. | 2 |
| D. | 32 |
| Answer» B. 8 | |
| 24. |
The number of electron levels in a magnesium atom is |
| A. | 3 |
| B. | 2 |
| C. | 1 |
| D. | 0 |
| Answer» B. 2 | |
| 25. |
The nitrogenous waste of Human Beings is |
| A. | Ammonia |
| B. | Urea |
| C. | Ammonium Nitrate |
| D. | Uric Acid |
| Answer» C. Ammonium Nitrate | |
| 26. |
The  chemical  properties  of  an  element depend upon |
| A. | the number of isotopes of the element |
| B. | the mass number of the element |
| C. | the total number of neutrons in the element |
| D. | the  number  of  electrons  in  the outermost shell of the element |
| Answer» E. | |
| 27. |
The nitrogen atom has 7 protons and 7 electrons,The nitride ion will have |
| A. | 10 protons and 7 electrons |
| B. | 7 protons and 10 electrons |
| C. | 4 protons and 7 electrons |
| D. | 4 protons and 10 electrons |
| Answer» C. 4 protons and 7 electrons | |
| 28. |
The movement of water molecules through the plasma membrane is called ______._x005F_x000D_ |
| A. | Osmosis |
| B. | Sedimentation |
| C. | Precipitation |
| D. | Transpiration |
| Answer» B. Sedimentation | |
| 29. |
The most serious air pollutant causing health hazard is |
| A. | Sulphur dioxide |
| B. | Carbon monoxide |
| C. | Ozone |
| D. | Nitrogen oxide |
| Answer» B. Carbon monoxide | |
| 30. |
The most reactive of the following metals is_x005F_x000D_ |
| A. | Al |
| B. | Ca |
| C. | Ni |
| D. | Pb |
| Answer» C. Ni | |
| 31. |
The most pure form of carbon among the options is |
| A. | Anthracite |
| B. | Lampblack |
| C. | Graphite |
| D. | Wood Charcoal |
| Answer» B. Lampblack | |
| 32. |
The most extensive use of molasses after fermentation is for producing |
| A. | Methanol |
| B. | Sugar |
| C. | Ethanol |
| D. | Sugarcane |
| Answer» D. Sugarcane | |
| 33. |
The Most Abundant Rare Gas in the Atmosphere is |
| A. | Xe |
| B. | He |
| C. | Ne |
| D. | Ar |
| Answer» E. | |
| 34. |
The most active ingredient in bleaching powder is |
| A. | Iodine |
| B. | Calcium hypochlorite |
| C. | Nitric acid |
| D. | Ammonium sulphate |
| Answer» C. Nitric acid | |
| 35. |
The most abundant of the rare gases i ?_x005F_x000D_ |
| A. | Helium |
| B. | Argon |
| C. | Neon |
| D. | Nitrogen |
| Answer» C. Neon | |
| 36. |
The most abundant metal in earth crust is |
| A. | Iron |
| B. | magnesium |
| C. | calcium |
| D. | aluminium |
| Answer» E. | |
| 37. |
The monomer of polythene is |
| A. | ethylene |
| B. | ethyl alcohol |
| C. | vinyl chloride |
| D. | ethanol |
| Answer» B. ethyl alcohol | |
| 38. |
The most abundant element in the earth's atmosphere is |
| A. | Argon |
| B. | Nitrogen |
| C. | Oxygen |
| D. | Krypton |
| Answer» C. Oxygen | |
| 39. |
The monomer/monomers used for the synthesis of Nylon 6 is/are |
| A. | hexamethylenediamine and adipic acid |
| B. | caprolactam |
| C. | urea and formaldehydeD. |
| D. | phenol and formaldehyde |
| Answer» B. caprolactam | |
| 40. |
The molecular mass of sulphuric acid is 98. If 49 g of the acid is dissolved in water to make one litre of solution, what will be the strength of the acid? |
| A. | Two normal |
| B. | One normal |
| C. | 0.5 normal |
| D. | Four normal |
| Answer» C. 0.5 normal | |
| 41. |
The modern periodic table consists of 18 groups and 7 periods. What is the atomic number of the element placed in the 2nd group and the 4th period? |
| A. | 20 |
| B. | 22 |
| C. | 18 |
| D. | 10 |
| Answer» B. 22 | |
| 42. |
The molecular formula of Propane is |
| A. | C2H6 |
| B. | C4H10 |
| C. | C3H8 |
| D. | CH4 |
| Answer» D. CH4 | |
| 43. |
The modern periodic table consists of 18 groups and 7 periods. What is the atomic number of the element placed in the 3rd group and the 4th period? |
| A. | 23 |
| B. | 21 |
| C. | 19 |
| D. | 11 |
| Answer» C. 19 | |
| 44. |
The modern periodic table consists of 18 groups and 7 periods. What is the atomic number of the element placed in the 1st group and the 4th period? |
| A. | 21 |
| B. | 17 |
| C. | 19 |
| D. | 9 |
| Answer» D. 9 | |
| 45. |
The melting point of ice is ____ K. |
| A. | 253.16 |
| B. | 263.16 |
| C. | 273.16 |
| D. | 283.16 |
| Answer» D. 283.16 | |
| 46. |
The metal that can be cut with a knife is |
| A. | Sodium |
| B. | Iron |
| C. | Aluminium |
| D. | Copper |
| Answer» B. Iron | |
| 47. |
The metal which reacts most violently with with cold water is |
| A. | calcium |
| B. | sodium |
| C. | magnesium |
| D. | potassium |
| Answer» E. | |
| 48. |
The maximum number of hydrogen bonds in a water molecule is........... |
| A. | 1 |
| B. | 3 |
| C. | 4 |
| D. | 2 |
| Answer» D. 2 | |
| 49. |
The maximum number of electrons that can be accommodated in M shell is |
| A. | 8 |
| B. | 2 |
| C. | 18 |
| D. | 32 |
| Answer» D. 32 | |
| 50. |
The maximum number of electrons that can be accommodated in a shell is indicated by the formula |
| A. | 2n-2 |
| B. | 2n3 |
| C. | 2n |
| D. | 2n2 |
| Answer» E. | |