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. |
During which change is energy absorbed? |
| A. | Exothermic |
| B. | Endothermic |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» C. Both A & B | |
| 2. |
During the melting of solid, its temperature_x005F_x000D_ Â _x005F_x000D_ |
| A. | Decreases |
| B. | increases |
| C. | May increase or decrease depending on the nature of solid |
| D. | Does not change |
| Answer» E. | |
| 3. |
During combustion of unsaturated compounds a ___ is seen. |
| A. | clean flame |
| B. | blue flame |
| C. | red flame |
| D. | yellow flame |
| Answer» E. | |
| 4. |
Dry ice is nothing but |
| A. | Solid carbon dioxide |
| B. | Baking soda |
| C. | Gaseous carbon dioxide |
| D. | Carbon monoxide |
| Answer» B. Baking soda | |
| 5. |
Dry distillation of calcium formate gives |
| A. | HCOOH |
| B. | CH3COOH |
| C. | HCHO |
| D. | CH3CHO |
| Answer» D. CH3CHO | |
| 6. |
Dried fruit like raisins when soaked in water, bulge and get filled with water. What is the scientific reason that explains this daily life event?_x005F_x000D_ |
| A. | Osmosis |
| B. | Active Transport |
| C. | Diffusion |
| D. | Passive Transport |
| Answer» B. Active Transport | |
| 7. |
Dobereiner could identify only ......... triads from the elements known at that time._x005F_x000D_ |
| A. | 1 |
| B. | 3 |
| C. | 4 |
| D. | 2 |
| Answer» C. 4 | |
| 8. |
Dissolving is best described as_x005F_x000D_ |
| A. | molecules breaking into ions |
| B. | a change from a solid to a liquid |
| C. | breaking covalent bonds |
| D. | a mingling of molecules and/or ions |
| Answer» E. | |
| 9. |
Discovery of the nucleus of an atom was due to the experiment carried out by |
| A. | Bohr |
| B. | Rutherford |
| C. | Moseley |
| D. | Thomson |
| Answer» C. Moseley | |
| 10. |
Dimond is |
| A. | an element |
| B. | a compound |
| C. | a mixture |
| D. | a liquid |
| Answer» B. a compound | |
| 11. |
Diamond is harder than Graphite because of |
| A. | tetrahedral structure of diamond |
| B. | difference of crystalline structures |
| C. | difference of layers of atoms |
| D. | hexagonal structure of graphite |
| Answer» C. difference of layers of atoms | |
| 12. |
Decane has how many hydrogen atoms? |
| A. | 22 |
| B. | 24 |
| C. | 11 |
| D. | 33 |
| Answer» B. 24 | |
| 13. |
Cutting and peeling of onion brings tears to the eyes because of the presence of _____ ? |
| A. | Amino acid |
| B. | Sulfur |
| C. | Carbon |
| D. | Fat |
| Answer» C. Carbon | |
| 14. |
Curdling of milk is an example of |
| A. | Inversion |
| B. | Denaturation |
| C. | Hydrolysis |
| D. | Coagulation |
| Answer» E. | |
| 15. |
Curd contains mainly ___ acid. |
| A. | Benzoic |
| B. | Fumaric |
| C. | Lactic |
| D. | Malic |
| Answer» D. Malic | |
| 16. |
CuO + H2 ---> Cu + H2O. This equation is an example of |
| A. | Oxidation |
| B. | Decomposition |
| C. | Reduction |
| D. | Redox |
| Answer» E. | |
| 17. |
Crystallisation is an example of? |
| A. | Physical Change |
| B. | Chemical Change |
| C. | Chemical Reaction |
| D. | Galvanisation |
| Answer» B. Chemical Change | |
| 18. |
Covalent bonds hold atoms together because they |
| A. | fill shells without giving atoms much charge |
| B. | bring electrons closer to protons |
| C. | Both A & B |
| D. | use forces between nuclei as well as forces between electrons |
| Answer» D. use forces between nuclei as well as forces between electrons | |
| 19. |
Covalent bonds are formed when electrons are |
| A. | Transfer of electrons |
| B. | Sharing of electrons |
| C. | Dividing of electrons |
| D. | All of the above |
| Answer» C. Dividing of electrons | |
| 20. |
Covalent Bond is also called _________. |
| A. | Molecular Bond |
| B. | Proton Bond |
| C. | Nucleus Bond |
| D. | Electron Bond |
| Answer» B. Proton Bond | |
| 21. |
Constantan is an alloy of copper and _______._x005F_x000D_ |
| A. | aluminium |
| B. | tin |
| C. | nickel |
| D. | iron |
| Answer» D. iron | |
| 22. |
Constantan is alloyed from ...... metals. |
| A. | Ni, Ti, Fe, Cr |
| B. | Cu, Ni, Mn |
| C. | Ni, Cr, Mn, Fe |
| D. | Cu, Ni |
| Answer» E. | |
| 23. |
Consider the following constituent gases of the atmosphere :_x005F_x000D_ 1. Argon_x005F_x000D_ 2. Neon_x005F_x000D_ 3. Helium_x005F_x000D_ 4.Ceirbon dioxide_x005F_x000D_ Which one of the following is the correct ascending sequence of the above gases in terms of the volume percentage? |
| A. | 1-3-2-4 |
| B. | 1-4-2-3 |
| C. | 4-2-3-1 |
| D. | 2-4-1-3 |
| Answer» C. 4-2-3-1 | |
| 24. |
Consider the following chemical reaction :_x005F_x000D_ aFe2O3(s)Â +Â bCO(g)Â +Â cFe(s)Â +Â dCO2_x005F_x000D_ In the balanced chemical equation of the above, which of the following will be the values of the coefficients a, b, c and d respectively? |
| A. | 3, 2, 3, 1 |
| B. | 1, 3, 2, 3 |
| C. | 2, 3, 3, 1 |
| D. | 3, 3, 2, 1 |
| Answer» C. 2, 3, 3, 1 | |
| 25. |
Conductivity in a metal results from the metal atoms having |
| A. | highly mobile electrons in the valence shell |
| B. | high electronegativity |
| C. | high ionization energy |
| D. | highly mobile protons in the nucleus |
| Answer» B. high electronegativity | |
| 26. |
Compounds are formed as a result of chemica change. |
| A. | 1 |
| B. | |
| C. | |
| D. | |
| Answer» B. | |
| 27. |
Common salt (NaCl) is made up of |
| A. | a weak acid and a weak base |
| B. | a strong acid and a weak base |
| C. | a weak acid and a strong base |
| D. | a strong acid and a strong base |
| Answer» E. | |
| 28. |
Common metals arranged in order of their decreasing reactivity is known as |
| A. | Reactivity |
| B. | Conductivity |
| C. | Electrolytic reduction |
| D. | Activity series |
| Answer» E. | |
| 29. |
Coagulation during water treatment is designed to remove |
| A. | Sand and gravel |
| B. | Bad smells |
| C. | Pathogenic microorganisms |
| D. | Particles suspended in water |
| Answer» E. | |
| 30. |
Cinnabar is an ore/mineral of |
| A. | Lead |
| B. | Manganese |
| C. | Molybdenum |
| D. | Mercury |
| Answer» E. | |
| 31. |
Chromite is an ore/mineral of |
| A. | Zinc |
| B. | Uranium |
| C. | Chromium |
| D. | Titanium |
| Answer» D. Titanium | |
| 32. |
Choose the pure substance from the list below._x005F_x000D_ |
| A. | Sugar |
| B. | Lemonade |
| C. | Air |
| D. | Sea water |
| Answer» B. Lemonade | |
| 33. |
Choose the one which is different or odd from the following. |
| A. | Aluminium |
| B. | Iron |
| C. | Copper |
| D. | Brass |
| Answer» E. | |
| 34. |
Choose the incorrect pair from the below._x005F_x000D_ |
| A. | pH of stomach acid- 1.0 |
| B. | pH of lemon juice- 2.0 |
| C. | pH of acid rain -5.0 |
| D. | pH of caustic soda- 5.0 |
| Answer» E. | |
| 35. |
Chloroform used as anaesthetic should be preserved in the dark in tightly stoppered bottles because otherwise |
| A. | it becomes coloured |
| B. | it gets evaporated in air |
| C. | it gets oxidised to phosgene |
| D. | it gets decomposed to chloropicrin |
| Answer» D. it gets decomposed to chloropicrin | |
| 36. |
Chlorine gas is used in the manufacture of: |
| A. | Baking powder |
| B. | Bleaching powder |
| C. | Baking soda |
| D. | Washing soda |
| Answer» C. Baking soda | |
| 37. |
Chemical properties of isotopes ............. |
| A. | must be same |
| B. | must be different |
| C. | need not be same |
| D. | need not be different |
| Answer» B. must be different | |
| 38. |
Chemical name of vinegar is |
| A. | Onam |
| B. | Pongal |
| C. | Bihu |
| D. | Hornbill |
| Answer» C. Bihu | |
| 39. |
Chemical name of Gold? |
| A. | Argentinum |
| B. | Ferrus |
| C. | Aurum |
| D. | Selenium |
| Answer» D. Selenium | |
| 40. |
Chemical formula of Ozone is ______._x005F_x000D_ |
| A. | h202 |
| B. | 2 |
| C. | 3 |
| D. | NH3 |
| Answer» D. NH3 | |
| 41. |
Chemical Formula of Water is _____ . |
| A. | O2H |
| B. | OH |
| C. | HO |
| D. | H2O |
| Answer» E. | |
| 42. |
Chemical formula for sulphurous acid is: |
| A. | H2SO4 |
| B. | H2SO3 |
| C. | H3SO3 |
| D. | H3SO4 |
| Answer» C. H3SO3 | |
| 43. |
Chemical composition of cement is |
| A. | Limestone and Clay |
| B. | Limestone, Clay and Gypsum |
| C. | Limestone and Gypsum |
| D. | Clay and Gypsum |
| Answer» C. Limestone and Gypsum | |
| 44. |
Charge on proton is equal to the charge on ______._x005F_x000D_ |
| A. | Electron |
| B. | Positron |
| C. | Neutron |
| D. | Alpha particle |
| Answer» C. Neutron | |
| 45. |
Ce-58 is a member of ........ block of elements._x005F_x000D_ |
| A. | d |
| B. | p |
| C. | f |
| D. | s |
| Answer» D. s | |
| 46. |
Cathode rays have |
| A. | mass only |
| B. | charge only |
| C. | no mass and no charge |
| D. | mass and charge both |
| Answer» E. | |
| 47. |
Carnotite is an ore/mineral of _____. |
| A. | Beryllium |
| B. | Chromium |
| C. | Uranium |
| D. | Copper |
| Answer» D. Copper | |
| 48. |
Carbon disulfide is prepared by heating sulfur and charcoal. |
| A. | 1 |
| B. | |
| C. | |
| D. | |
| Answer» B. | |
| 49. |
Carbon dioxide is one of the gases that cause the _________._x005F_x000D_ |
| A. | greenhouse effect_x005F_x000D_ |
| B. | ozonification_x005F_x000D_ |
| C. | oven phenomenon_x005F_x000D_ |
| D. | sunburn_x005F_x000D_ |
| Answer» B. ozonification_x005F_x000D_ | |
| 50. |
Calcium salts used as fertilizer is: |
| A. | Calcium Carbide |
| B. | Calcium Carbonate |
| C. | Calcium Cyanide |
| D. | Calcium Sulphate |
| Answer» E. | |