MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 180 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The presence of Cobalt in Vitamin B12 was established for the first time by |
| A. | Hydrolysis test |
| B. | Spectroscopy |
| C. | Borax-Bead test |
| D. | Sodium Nitroprusside test |
| Answer» C. Borax-Bead test | |
| 2. |
Alcoholic ( OH) group can be identified by : |
| A. | Tollen's Reagent Test |
| B. | Esterification Test |
| C. | FeCl |
| D. | Test |
| E. | Ozonolysis Reaction |
| Answer» D. Test | |
| 3. |
Which of the following causes the rusting of iron? a. Oxidation b. Reduction c. Chemical reaction with oxygend. Chemical reaction with CO2 |
| A. | a and b |
| B. | b and c |
| C. | c and d |
| D. | a and c |
| Answer» E. | |
| 4. |
Which of the following statements are correct about chloroform? a. Liquid fuel b. Anaesthetic in nature c. Produces phosgene d. Fire extinguisher |
| A. | a, b |
| B. | a, c |
| C. | b, c |
| D. | d, a |
| Answer» D. d, a | |
| 5. |
The main constituent of biogas is |
| A. | oxygen |
| B. | methane |
| C. | acetic acid |
| D. | methyl alcohol |
| Answer» C. acetic acid | |
| 6. |
Which of the following appeared to be with a significant potential for accumulation through food chains ? |
| A. | DDT |
| B. | Parathion |
| C. | Lindane |
| D. | Carbary |
| Answer» E. | |
| 7. |
Which of the following can be found as pollutants in the drinking water in some parts of India? Select the correct answer using the code given below.(A) Arsenic (B) Sorbitol (C) Fluoride (D) Formaldehyde (E) Uranium |
| A. | B, D and E |
| B. | A, B, C, D and E |
| C. | A, C and E |
| D. | A and C |
| Answer» D. A and C | |
| 8. |
What happens when a drop of glycerol is added to crushed KMnO4 spread on a paper ? |
| A. | There is a crackling sound. |
| B. | There is a violent explosion. |
| C. | There is no reaction. |
| D. | The paper ignites. |
| Answer» C. There is no reaction. | |
| 9. |
Which one of the following has a maximum tendency to form M3 ion ? |
| A. | N |
| B. | Bi |
| C. | P |
| D. | As |
| Answer» B. Bi | |
| 10. |
Adding Cl2 to benzene in the presence of AlCl3 is an example of : |
| A. | Elimination reaction |
| B. | Substitution reaction |
| C. | None of the options |
| D. | Addition reaction |
| Answer» C. None of the options | |
| 11. |
If there is one million Mg2+ ions in MgCl2, how many chloride ions are there? |
| A. | Two million |
| B. | One million |
| C. | Half a million |
| D. | Ten million |
| Answer» B. One million | |
| 12. |
KMnO4 can be used as |
| A. | Insecticide |
| B. | Fertilizer |
| C. | Pesticide |
| D. | Disinfectant |
| Answer» E. | |
| 13. |
The solid waste is also known as |
| A. | Sedge |
| B. | Toxic waste |
| C. | Sludge |
| D. | Scrubber |
| Answer» D. Scrubber | |
| 14. |
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 | |
| 15. |
Brown stains in vessels and clothes indicate the presence of high quantities of ______ in water |
| A. | Magnesium |
| B. | Calcium |
| C. | Manganese |
| D. | Chromium |
| E. | None of these |
| Answer» F. | |
| 16. |
The compound used in pricklyheat powder to prevent excessive sweating is |
| A. | Boric acid |
| B. | Phosphoric acid |
| C. | Carbonic acid |
| D. | Sulphonic acid |
| Answer» B. Phosphoric acid | |
| 17. |
Particulates (< 1 m size) remaining suspended in air indefinitely and transported by wind currents are called |
| A. | Mists |
| B. | Fumes |
| C. | Aerosols |
| D. | Smoke |
| Answer» D. Smoke | |
| 18. |
Chemical composition of cementis |
| A. | Limestone and Clay |
| B. | Limestone, Clay and Gypsum |
| C. | Limestone and Gypsum |
| D. | Clay and Gypsum |
| Answer» C. Limestone and Gypsum | |
| 19. |
The most abundant element in the earth s atmosphere is |
| A. | Argon |
| B. | Nitrogen |
| C. | Oxygen |
| D. | Krypton |
| Answer» C. Oxygen | |
| 20. |
____ is used for making vinegar. |
| A. | Tartaric acid |
| B. | Malic acid |
| C. | Oxalic acid |
| D. | Acetic acid |
| Answer» E. | |
| 21. |
Major portion of the earth s crust is mainly constituted by |
| A. | Oxygen and Iron |
| B. | Oxygen and Silicon |
| C. | Silicon and Iron |
| D. | Silicon and Aluminium |
| Answer» C. Silicon and Iron | |
| 22. |
_________ is a by product of sewage treatment and can be decomposed to produce biogas |
| A. | Sewage |
| B. | Sludge |
| C. | Sewer |
| D. | Scum |
| Answer» C. Sewer | |
| 23. |
The basic process taking place in nuclear reactors is |
| A. | Radioactivity |
| B. | Fission |
| C. | Fusion |
| D. | None of the above |
| Answer» C. Fusion | |
| 24. |
Sullage water is |
| A. | waste water released from kitchen |
| B. | waste water released from toilets |
| C. | waste water released from factories |
| D. | waste water released from hospitals |
| Answer» B. waste water released from toilets | |
| 25. |
The manufacturing of iron from ironore involves the process of |
| A. | Oxidation |
| B. | Reduction |
| C. | Electrolysis |
| D. | Fractional distillation |
| Answer» C. Electrolysis | |
| 26. |
Potassium Permanganate is used for purifying drinking water, because_________ |
| A. | It is a reducing agent |
| B. | It is an oxidising agent |
| C. | It is a sterilising agent |
| D. | It dissolves the impurities of water |
| Answer» C. It is a sterilising agent | |
| 27. |
Sweat contains water and _______. |
| A. | Citric acid |
| B. | Lactic acid |
| C. | Salt |
| D. | Vinegar |
| Answer» D. Vinegar | |
| 28. |
Which of the following particles has the dual nature of particle wave? |
| A. | Electron |
| B. | Meson |
| C. | Proton |
| D. | Neutron |
| Answer» B. Meson | |
| 29. |
The radiation that can penetrate deepest in our body |
| A. | UV-radiation |
| B. | Alpha-particles |
| C. | b-particles |
| D. | Gamma-particles |
| Answer» E. | |
| 30. |
If there is one million Mg |
| A. | Two million |
| B. | One million |
| C. | Half a million |
| D. | Ten million |
| Answer» B. One million | |
| 31. |
In a reaction of the type A+B C+D one could ensure it to be a first order reaction by : |
| A. | Increasing the temperature |
| B. | Increasing the concentration of a product |
| C. | Increasing the concentration of a reactant |
| D. | Adding a catalyst |
| Answer» D. Adding a catalyst | |
| 32. |
The King of Metals is : |
| A. | Gold |
| B. | Silver |
| C. | Iron |
| D. | Aluminium |
| Answer» B. Silver | |
| 33. |
Organic food is supposed to be better for human consumption because : |
| A. | It is grown in glass house & air tight environment. |
| B. | It is grown without the use of chemicals & synthetic pesticides. |
| C. | It depends on chemicals & fertilizers. |
| D. | It is too expensive to buy. |
| Answer» C. It depends on chemicals & fertilizers. | |
| 34. |
The number of hydrogen bonds between guanine and cytosine in DNA is |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 1 |
| Answer» C. 4 | |
| 35. |
Which of the following does the Nucleus of an atom consist of? |
| A. | Protons and neutrons |
| B. | Protons and electrons |
| C. | Electrons |
| D. | Protons |
| Answer» B. Protons and electrons | |
| 36. |
J.J. Thomson s proposed model of action is generally called ................... model. |
| A. | Cream and cake |
| B. | Plum and pudding |
| C. | Plum and cake |
| D. | Cream and pudding |
| Answer» C. Plum and cake | |
| 37. |
Which of the following substance s smell is similar to Ethanoic acid? |
| A. | Tomato juice |
| B. | Kerosene |
| C. | Vinegar |
| D. | Lemon |
| Answer» D. Lemon | |
| 38. |
Which one of the following has a maximum tendency to form M |
| A. | N |
| B. | Bi |
| C. | P |
| D. | As |
| Answer» B. Bi | |
| 39. |
Adding Cl |
| A. | Elimination reaction |
| B. | Substitution reaction |
| C. | None of the options |
| D. | Addition reaction |
| Answer» C. None of the options | |
| 40. |
_____ gives hardness to stainless steel. |
| A. | Zinc |
| B. | Lead |
| C. | Carbon |
| D. | Tin |
| Answer» D. Tin | |
| 41. |
The most abundant metal in the Earth s crust is |
| A. | zinc |
| B. | copper |
| C. | aluminium |
| D. | iron |
| Answer» D. iron | |
| 42. |
Biofertilizers convert nitrogen to _______ . |
| A. | nitrates |
| B. | ammonia |
| C. | nitrogenase |
| D. | amino acids |
| Answer» C. nitrogenase | |
| 43. |
Ozone saves the biosphere by absorbing high energy radiations called _____ . |
| A. | Infra-red (IR) |
| B. | Gamma rays |
| C. | Ultraviolet rays (UV) |
| D. | X rays |
| Answer» D. X rays | |
| 44. |
Silver gets corroded due to ___ in air. |
| A. | Oxygen |
| B. | Hydrogen Sulphide |
| C. | Carbon dioxide |
| D. | Nitrogen |
| Answer» C. Carbon dioxide | |
| 45. |
All isotopes of the same element have ______ |
| A. | different atomic numbers and different atomic mass |
| B. | different atomic numbers and the same atomic mass |
| C. | the same atomic number but different atomic masses |
| D. | the same atomic number and the atomic mass |
| Answer» D. the same atomic number and the atomic mass | |
| 46. |
Even after sunset, the air near the Earth s surface continue to receive heat due to |
| A. | Insolation |
| B. | Terrestrial Radiation |
| C. | Conduction |
| D. | Convection |
| Answer» C. Conduction | |
| 47. |
The enormous amount of energy released in an explosion of an atmoic bomb is due to the |
| A. | conversion of mass into energy |
| B. | conversion of chemical energy into heat energy |
| C. | conversion of mechnical energy into nuclear energy |
| D. | conversion of neutrons into protons |
| Answer» E. | |
| 48. |
The weight of 6.023 1022 atoms of carbon is |
| A. | 12 gms |
| B. | 120 gms |
| C. | 1.2 gms |
| D. | 0.12 gms |
| Answer» B. 120 gms | |
| 49. |
The process of improving the quality of rubber by heating it with sulphur is called. |
| A. | Vulcanization |
| B. | Acceleration |
| C. | Sulphonation |
| D. | Galvanization |
| Answer» B. Acceleration | |
| 50. |
The chemical name of Plaster of Paris commonly used for setting broken bones is |
| A. | Calcium nitrate |
| B. | Calcium sulphate |
| C. | Calcium carbonate |
| D. | Calcium chloride |
| Answer» C. Calcium carbonate | |