MCQOPTIONS
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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. | 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. | 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. | 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 | |