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. |
Which of the following induces souring of milk? |
| A. | Acetic Acid |
| B. | Citric Acid |
| C. | Ascorbic Acid |
| D. | Lactic Acid |
| Answer» E. | |
| 2. |
Which of the following inert gases is placed in period 4 of the periodic table? |
| A. | Kr |
| B. | Rn |
| C. | Xe |
| D. | Ar |
| Answer» B. Rn | |
| 3. |
Which of the following has the largest sized atoms? |
| A. | Al |
| B. | S |
| C. | Si |
| D. | P |
| Answer» B. S | |
| 4. |
Which of the following has the highest melting and boiling point?_x005F_x000D_ |
| A. | Lithium |
| B. | Phosphorous |
| C. | Carbon |
| D. | Argon |
| Answer» D. Argon | |
| 5. |
Which of the following has the lowest melting point?_x005F_x000D_ |
| A. | Zinc |
| B. | Silver |
| C. | Lead |
| D. | Tin |
| Answer» E. | |
| 6. |
Which of the following green house gases has the greatest heat-trapping ability? |
| A. | Chlorofluoro carbon |
| B. | Methane |
| C. | Carbon dioxide |
| D. | Nitrous oxide |
| Answer» B. Methane | |
| 7. |
Which of the following gases turns lime water milky? |
| A. | O3 |
| B. | CO2 |
| C. | O2 |
| D. | CO |
| Answer» C. O2 | |
| 8. |
Which of the following has largest atomic radius?_x005F_x000D_ |
| A. | Li |
| B. | Be |
| C. | B |
| D. | O |
| Answer» B. Be | |
| 9. |
Which of the following group does NOT follow Newlands Law of Octaves?_x005F_x000D_ |
| A. | Li, Na |
| B. | Be, Mg_x005F_x000D_ |
| C. | C, Si_x005F_x000D_ |
| D. | Mn, Hg |
| Answer» E. | |
| 10. |
Which of the following group is NOT Dobereiner Triads?_x005F_x000D_ |
| A. | Li, Na, K |
| B. | N, P Au |
| C. | Cl, Br, I |
| D. | Ca, Sr, Ba |
| Answer» C. Cl, Br, I | |
| 11. |
Which of the following gases is produced due to incomplete combustion of fuel? |
| A. | Carbon Dioxide |
| B. | Carbon Monoxide |
| C. | Methane |
| D. | Ethane |
| Answer» C. Methane | |
| 12. |
Which of the following gases is used to prevent food material from getting oxidised? |
| A. | Oxygen |
| B. | Chlorine |
| C. | Nitrogen |
| D. | Hydrogen |
| Answer» D. Hydrogen | |
| 13. |
Which of the following gases is not generated in a biogas plant? |
| A. | H2S |
| B. | CO2 |
| C. | CH4 |
| D. | CO |
| Answer» E. | |
| 14. |
Which of the following gases makes bread or cake rise making them soft and spongy? |
| A. | CO |
| B. | CO2 |
| C. | H2 |
| D. | O2 |
| Answer» C. H2 | |
| 15. |
Which of the following gases is present under pressure in soft drinks? |
| A. | Nitrous oxide |
| B. | Oxygen |
| C. | Nitrogen |
| D. | Carbon dioxide |
| Answer» E. | |
| 16. |
Which of the following gases is liberated when Sodium Hydrogen Carbonate is heated? |
| A. | Carbon Monoxide |
| B. | Carbon Dioxide |
| C. | Oxygen |
| D. | Hydrogen |
| Answer» C. Oxygen | |
| 17. |
Which of the following gases is heavier than oxygen? |
| A. | Carbon dioxide |
| B. | Ammonia |
| C. | Methane |
| D. | Helium |
| Answer» B. Ammonia | |
| 18. |
Which of the following gases is known as "Laughing Gas"? |
| A. | Nitrous oxide |
| B. | Nitrogen peroxide |
| C. | Nitrogen |
| D. | Nitric oxide |
| Answer» B. Nitrogen peroxide | |
| 19. |
Which of the following gas was released during Bhopal gas tragedy? |
| A. | Methyl isocyanate |
| B. | Sodium isothiocyanate |
| C. | Nitrogen isothiocyanate |
| D. | Potassium isothiocyanate |
| Answer» B. Sodium isothiocyanate | |
| 20. |
Which of the following gases are responsible for the greenhouse gas effect on Earth? |
| A. | Water Vapour and Carbon dioxide |
| B. | Carbon dioxide and Nitrogen |
| C. | Oxygen and Methane |
| D. | Ozone and Methane |
| Answer» B. Carbon dioxide and Nitrogen | |
| 21. |
Which of the following equations represents Photosynthesis? |
| A. | 6CO2 + 6H2O -----> C6H12O6 + 6O2 |
| B. | C6H12O6 + 6O2 -----> CO2 + 6H2O |
| C. | CO2 + H2O -----> C6H12O6 + 6O2 |
| D. | 6O2 + 6H2O -----> C6H12O6 + 6CO2 |
| Answer» B. C6H12O6 + 6O2 -----> CO2 + 6H2O | |
| 22. |
Which of the following fuel has maximum calorific value? |
| A. | Petrol |
| B. | Coal |
| C. | Wood |
| D. | Cow dung_x005F_x000D_ |
| Answer» B. Coal | |
| 23. |
Which of the following gas leaked in the Bhopal Gas tragedy in December 1984? |
| A. | Methyl isocyanate |
| B. | Methyl isochlorate |
| C. | Methyl Phosphate |
| D. | Methyl Isopropate |
| Answer» B. Methyl isochlorate | |
| 24. |
Which of the following equals one atomic mass unit? |
| A. | one-twelfth the mass of one carbon-12 atom |
| B. | the mass of one electron |
| C. | one-sixth the mass of one helium-4 atom |
| D. | the mass of one carbon-12 atom |
| Answer» B. the mass of one electron | |
| 25. |
Which of the following elements was the last element in Newland's Law of Octaves? |
| A. | Thorium |
| B. | Hydrogen |
| C. | Rubidium |
| D. | Bromine |
| Answer» B. Hydrogen | |
| 26. |
Which of the following elements is a metalloid? |
| A. | arsenic |
| B. | boron |
| C. | antimony |
| D. | All of the above |
| Answer» E. | |
| 27. |
Which of the following elements is used for vulcanizing rubber? |
| A. | Sulphur |
| B. | Chlorine |
| C. | Bromine |
| D. | Phosphorus |
| Answer» B. Chlorine | |
| 28. |
Which of the following elements replaced eka-Aluminium in Mendeleev's Periodic table? |
| A. | Scandium |
| B. | Gallium |
| C. | Titanium |
| D. | Germanium |
| Answer» C. Titanium | |
| 29. |
Which of the following elements has the unique ability to form bonds with other atoms of the same element giving rise to large molecules? |
| A. | Aluminum |
| B. | Hydrogen |
| C. | Carbon |
| D. | Nitrogen |
| Answer» D. Nitrogen | |
| 30. |
Which of the following elements has the lowest electronegativity |
| A. | Bromine |
| B. | Fluorine |
| C. | Carbon |
| D. | Lithium |
| Answer» E. | |
| 31. |
Which of the following elements has the lowest melting point? |
| A. | Chromium |
| B. | Hydrogen |
| C. | Zinc |
| D. | Silver |
| Answer» C. Zinc | |
| 32. |
Which of the following elements has the electronic configuration 2, 8, 3? |
| A. | Magnesium |
| B. | Sodium |
| C. | Aluminium |
| D. | Argon |
| Answer» D. Argon | |
| 33. |
Which of the following elements has a total of 3 shells with 8 electrons in the last orbit? |
| A. | Ar |
| B. | P |
| C. | S |
| D. | Al |
| Answer» B. P | |
| 34. |
Which of the following elements has the highest electronegativity? |
| A. | Chlorine |
| B. | Bromine |
| C. | Fluorine |
| D. | Helium |
| Answer» D. Helium | |
| 35. |
Which of the following element is NOT a metal?_x005F_x000D_ |
| A. | Al_x005F_x000D_ |
| B. | P_x005F_x000D_ |
| C. | Ca |
| D. | K |
| Answer» C. Ca | |
| 36. |
Which of the following element has highest electronegativity?_x005F_x000D_ |
| A. | Fluorine |
| B. | Sodium |
| C. | Chlorine |
| D. | Oxygen |
| Answer» B. Sodium | |
| 37. |
Which of the following describes the process of glycolysis? |
| A. | It represents the first stage in the chemical oxidation of glucose by a cell. |
| B. | Breakdown of Glucose |
| C. | Converts Glucose to Pyruvate |
| D. | All the above |
| Answer» E. | |
| 38. |
Which of the following does not contain the material particles |
| A. | alpha - rays |
| B. | beta - rays |
| C. | gamma - rays |
| D. | anode rays |
| Answer» D. anode rays | |
| 39. |
Which of the following constitutes highest percentage of Green House gases? |
| A. | Ethane |
| B. | Methane |
| C. | Carbon Dioxide |
| D. | Propane |
| Answer» D. Propane | |
| 40. |
Which of the following displays a non-polar covalent bonding?_x005F_x000D_ |
| A. | Chlorine molecule |
| B. | Sulphuric acid |
| C. | Water molecule |
| D. | Ammonia molecule |
| Answer» B. Sulphuric acid | |
| 41. |
Which of the following definitions describes a chemical hazard? |
| A. | Microorganisms, such as bacteria, fungus, mold, or viruses that can cause illness |
| B. | These hazards can lead to injuries to the joints or muscles by way of heavy, frequent lifting, repetitive tasks |
| C. | Can be present in dust, fumes, liquids, solids, mists, vapors, or gases of products used at a site or released during a construction job |
| D. | The most commonly thought of hazards for construction |
| Answer» D. The most commonly thought of hazards for construction | |
| 42. |
Which of the following chemical compounds has the highest boiling point? |
| A. | Dimethyl ether (CH3OCH3) |
| B. | Methanol (CH3OH) |
| C. | Methane (CH4) |
| D. | None |
| Answer» C. Methane (CH4) | |
| 43. |
Which of the following classifications is based on atomic numbers? |
| A. | Mendeleev's Periodic Table |
| B. | Modern Periodic Table |
| C. | Newlands Law of Octaves |
| D. | Dobereiner's Law of Triads |
| Answer» C. Newlands Law of Octaves | |
| 44. |
Which of the following compounds has a double bond? |
| A. | Acetylene |
| B. | Ethene |
| C. | Ethane |
| D. | Methane |
| Answer» C. Ethane | |
| 45. |
Which of the following compounds from nitrites with nitrous acid? |
| A. | Primary amines |
| B. | Secondary amines |
| C. | Tertiary amines |
| D. | All of these |
| Answer» E. | |
| 46. |
Which of the following compounds is the strongest acid? |
| A. | p-nitrophenol |
| B. | phenol |
| C. | m-nitrophenol |
| D. | p-cresol |
| Answer» B. phenol | |
| 47. |
Which of the following causes damage to bridges, iron railings and all objects made of metals? |
| A. | Reduction |
| B. | Rancidity |
| C. | Acidity |
| D. | Corrosion |
| Answer» E. | |
| 48. |
Which of the following carbohydrates is a polysaccharide? |
| A. | Fructose |
| B. | Cellulose |
| C. | Glucose |
| D. | Sucrose |
| Answer» C. Glucose | |
| 49. |
Which of the following causes acid rain?_x005F_x000D_ I. SO2_x005F_x000D_ II. NO2_x005F_x000D_ III. CO2_x005F_x000D_ |
| A. | Only I and II |
| B. | Only II and III |
| C. | Only I and III |
| D. | All I, II and III |
| Answer» B. Only II and III | |
| 50. |
Which of the following carbon compounds is used as a fire- extinguisher? |
| A. | Carbon disulphide |
| B. | Chloroform |
| C. | Carbon tetrachloride |
| D. | Methyl ene chloride |
| Answer» D. Methyl ene chloride | |