MCQOPTIONS
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MCQOPTIONS
This section includes 64 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The nucleus of an atom consists of |
| A. | electrons and neutrons |
| B. | electrons and protons |
| C. | protons and neutrons |
| D. | All of the above |
| Answer» D. All of the above | |
| 2. |
The high reactivity of fluorine is due to |
| A. | its high electro negativity |
| B. | small size of fluorine atom |
| C. | availability of d-orbitals |
| D. | strong F - F bond |
| Answer» B. small size of fluorine atom | |
| 3. |
The method that cannot be used for removing permanent hardness of water is |
| A. | adding sodium carbonate |
| B. | distillation |
| C. | adding caustic soda |
| D. | boiling |
| Answer» E. | |
| 4. |
The main chemical constituent of clay is |
| A. | silicon oxide |
| B. | aluminium borosilicate |
| C. | zeolites |
| D. | aluminium silicate |
| Answer» E. | |
| 5. |
The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is |
| A. | 5x/36 |
| B. | 5x |
| C. | 7.2 x |
| D. | x/6 |
| Answer» B. 5x | |
| 6. |
The major constituent of air is |
| A. | nitrogen |
| B. | carbon dioxide |
| C. | oxygen |
| D. | hydrogen |
| Answer» B. carbon dioxide | |
| 7. |
The mineral containing both magnesium and calcium is |
| A. | magnesite |
| B. | calcite |
| C. | carnallite |
| D. | dolomite |
| Answer» E. | |
| 8. |
The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock's called |
| A. | granite |
| B. | basalt |
| C. | igneous rocks |
| D. | sedimentary rocks |
| Answer» D. sedimentary rocks | |
| 9. |
The main use of salt in the diet is to |
| A. | make the taste of food better |
| B. | produce in small amounts the hydrochloric acid required for the digestion of food |
| C. | ease the process of cooking |
| D. | increase the solubility of food particles in water |
| Answer» C. ease the process of cooking | |
| 10. |
The monomer of polythene is |
| A. | vinyl chloride |
| B. | ethylene |
| C. | ethyl alcohol |
| D. | None of the above |
| Answer» C. ethyl alcohol | |
| 11. |
The luster of a metal is due to |
| A. | its high density |
| B. | its high polishing |
| C. | its chemical inertness |
| D. | presence of free electrons |
| Answer» E. | |
| 12. |
The nucleus of a hydrogen atom consists of |
| A. | 1 proton only |
| B. | 1 proton + 2 neutron |
| C. | 1 neutron only |
| D. | 1 electron only |
| Answer» B. 1 proton + 2 neutron | |
| 13. |
The heat required to raise the temperature of body by 1 K is called |
| A. | specific heat |
| B. | thermal capacity |
| C. | water equivalent |
| D. | None of the above |
| Answer» C. water equivalent | |
| 14. |
The nuclear particles which are assumed to hold the nucleons together are |
| A. | electrons |
| B. | positrons |
| C. | neutrons |
| D. | mesons |
| Answer» E. | |
| 15. |
The gas used for artificial ripening of green fruit is |
| A. | ethylene |
| B. | ethane |
| C. | carbon dioxide |
| D. | acetylene |
| Answer» B. ethane | |
| 16. |
The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle? |
| A. | 3 billion years |
| B. | 100 years |
| C. | 0.01 minute |
| D. | 13 days |
| Answer» D. 13 days | |
| 17. |
The graphite rods in the nuclear reactor |
| A. | react with U to release energy |
| B. | produce neutrons |
| C. | undergo combustion which triggers the nuclear fission |
| D. | convert fast moving neutrons into thermal neutrons |
| Answer» E. | |
| 18. |
Zone refining is used for the purification of |
| A. | Au |
| B. | Ge |
| C. | Ag |
| D. | Cu |
| Answer» C. Ag | |
| 19. |
The molecule which has the highest percentage of ionic character among the following is |
| A. | HI |
| B. | HF |
| C. | HCI |
| D. | HBr |
| Answer» C. HCI | |
| 20. |
The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is |
| A. | Dalton's law |
| B. | Gay Lussac's law |
| C. | Henry's law |
| D. | Raoult's law |
| Answer» D. Raoult's law | |
| 21. |
The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is |
| A. | helium |
| B. | ozone |
| C. | oxygen |
| D. | methane |
| Answer» C. oxygen | |
| 22. |
The most commonly used bleaching agent is |
| A. | alcohol |
| B. | carbon dioxide |
| C. | chlorine |
| D. | sodium chlorine |
| Answer» D. sodium chlorine | |
| 23. |
The most malleable metal is |
| A. | platinum |
| B. | silver |
| C. | iron |
| D. | gold |
| Answer» E. | |
| 24. |
The most abundant rare gas in the atmosphere is |
| A. | He |
| B. | Ne |
| C. | Ar |
| D. | Xe |
| Answer» D. Xe | |
| 25. |
The Latin word formica means ant. The name formic acid is derived from this Latin word because |
| A. | this acid, in ancient times, was used to eliminate ant-hills |
| B. | this corrosive acid is secreted by ants to drive away their enemies |
| C. | this acid was first obtained by the distillation of ants |
| D. | ants are attracted by the odour of this acid |
| Answer» D. ants are attracted by the odour of this acid | |
| 26. |
The oil used in the froth floatation process is |
| A. | coconut oil |
| B. | olive oil |
| C. | kerosene oil |
| D. | pine oil |
| Answer» E. | |
| 27. |
The ore which is found in abundance in India is |
| A. | monazite |
| B. | fluorspar |
| C. | bauxite |
| D. | magnetite |
| Answer» B. fluorspar | |
| 28. |
The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is |
| A. | 2.05 gram |
| B. | 3.05 gram |
| C. | 4.05 gram |
| D. | 5.05 gram |
| Answer» C. 4.05 gram | |
| 29. |
The inherited traits of an organism are controlled by |
| A. | RNA molecules |
| B. | nucleotides |
| C. | DNA molecules |
| D. | enzymes |
| Answer» D. enzymes | |
| 30. |
The heat energy produced when the human body metabolises 1 gram of fat is |
| A. | 30 KJ |
| B. | 1 KJ |
| C. | 39 KJ |
| D. | 29 KJ |
| Answer» D. 29 KJ | |
| 31. |
What are the number of moles of CO2 which contains 16 g of oxygen? |
| A. | 0.5 mole |
| B. | 0.2 mole |
| C. | 0.4 mole |
| D. | 0.25 mole |
| Answer» B. 0.2 mole | |
| 32. |
The octane number of zero is assigned to |
| A. | 2-methyl octane |
| B. | n-heptane |
| C. | iso-octane |
| D. | 3-methyl octane |
| Answer» C. iso-octane | |
| 33. |
The metal that is used as a catalyst in the hydrogenation of oils is |
| A. | Ni |
| B. | Pb |
| C. | Cu |
| D. | Pt |
| Answer» B. Pb | |
| 34. |
The most electropositive elements among the following is |
| A. | Na |
| B. | Ca |
| C. | K |
| D. | Cs |
| Answer» E. | |
| 35. |
The items amenable to detection by soft x-rays are |
| A. | contrabands |
| B. | lead in bullets |
| C. | narcotics |
| D. | genuine coins from counterfeit coins |
| Answer» E. | |
| 36. |
The material which can be deformed permanently by heat and pressure is called a |
| A. | thermoplastic |
| B. | thermoset |
| C. | chemical compound |
| D. | polymer |
| Answer» C. chemical compound | |
| 37. |
The inexpensive and commonly used variety of glass is called soda glass. It is called so because |
| A. | was used initially for making bottles of soda(carbonated drink) |
| B. | is made using soda(sodium carbonate) |
| C. | was initially used for storing sodium carbonate |
| D. | is made using soda lime |
| Answer» C. was initially used for storing sodium carbonate | |
| 38. |
The gas used in the manufacture of vanaspati from vegetable oil is |
| A. | hydrogen |
| B. | oxygen |
| C. | nitrogen |
| D. | carbon dioxide |
| Answer» B. oxygen | |
| 39. |
The names of the scientists, Newlands, Mendeleev, and Meyer are associated with the development of |
| A. | atomic structure |
| B. | metallurgy |
| C. | periodic table of contents |
| D. | discovery of elements |
| Answer» D. discovery of elements | |
| 40. |
The maximum number of covalent formed by nitrogen is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 41. |
The formula C6H5-CO-CH3 represents |
| A. | Acetone |
| B. | Acetic acid |
| C. | Acetophenone |
| D. | Phenyl acetate |
| Answer» D. Phenyl acetate | |
| 42. |
The method of concentrating the ore which makes use of the difference in density between ore and impurities is called |
| A. | liquation |
| B. | leaching |
| C. | levigation |
| D. | magnetic separation |
| Answer» D. magnetic separation | |
| 43. |
The inert gases are ____ in water |
| A. | sparingly soluble |
| B. | insoluble |
| C. | soluble |
| D. | None of these |
| Answer» B. insoluble | |
| 44. |
The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind? |
| A. | 1/6 |
| B. | 1/3 |
| C. | 1/8 |
| D. | 1/4 |
| Answer» D. 1/4 | |
| 45. |
The human body is made up of several chemical elements; the element present in the highest proportion (65%) in the body is |
| A. | carbon |
| B. | hydrogen |
| C. | oxygen |
| D. | nitrogen |
| Answer» D. nitrogen | |
| 46. |
The metal does not give H2 on treatment with dilute HCL is |
| A. | Zn |
| B. | Fe |
| C. | Ag |
| D. | Ca |
| Answer» D. Ca | |
| 47. |
The number of g-molecule of oxygen in 6.02 x 1024CO molecules is |
| A. | 1 gram of molecule |
| B. | 0.5 gram of molecule |
| C. | 5 gram of molecule |
| D. | 10 gram of molecule |
| Answer» D. 10 gram of molecule | |
| 48. |
The most extensive, commercially useful source of thorium as monazite sand occurs in India at |
| A. | Orissa coast |
| B. | Travancore coast |
| C. | West Bengal coast |
| D. | Gujarat coast |
| Answer» C. West Bengal coast | |
| 49. |
The main active constituent of tea and coffee is |
| A. | nicotine |
| B. | chlorophyll |
| C. | caffeine |
| D. | aspirin |
| Answer» D. aspirin | |
| 50. |
The maximum number of isomers for an alkene with molecular formula C4H8 is |
| A. | 5 |
| B. | 4 |
| C. | 2 |
| D. | 3 |
| Answer» C. 2 | |