MCQOPTIONS
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MCQOPTIONS
This section includes 69 Mcqs, each offering curated multiple-choice questions to sharpen your GK knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Chemical structure of pearl is- |
| A. | Calcium carbonate |
| B. | Calcium carbonate and magnesium carbonate |
| C. | Calcium chloride |
| D. | Calcium sulfate |
| Answer» C. Calcium chloride | |
| 52. |
Which of the following is purified by Elevation method- |
| A. | Naphthalene |
| B. | Ether |
| C. | Benzoic acid |
| D. | None of these |
| Answer» B. Ether | |
| 53. |
Boiling Point of a liquid due to impurities |
| A. | increases |
| B. | decreases |
| C. | remains unchanged |
| D. | None of these |
| Answer» B. decreases | |
| 54. |
Crystallization is an example of |
| A. | Physical change |
| B. | Chemical Transformation |
| C. | Chemical reaction |
| D. | Galvanization |
| Answer» B. Chemical Transformation | |
| 55. |
The halogen used as an analgesic is- |
| A. | Chlorine |
| B. | Bromine |
| C. | Iodine |
| D. | Fluorine |
| Answer» D. Fluorine | |
| 56. |
A catalyst is a substance that_________ the velocity of a chemical reaction. |
| A. | Increases |
| B. | Decreases |
| C. | Changes |
| D. | None of these |
| Answer» D. None of these | |
| 57. |
Nowadays yellow lamps are being used in abundance in street lights. Which of the following gas are used in these lamps? |
| A. | Sodium |
| B. | Neon |
| C. | Hydrogen |
| D. | Nitrogen |
| Answer» B. Neon | |
| 58. |
The tendency to receive electrons is called- |
| A. | Oxidation |
| B. | Reduction |
| C. | Catalysis |
| D. | Motivation |
| Answer» C. Catalysis | |
| 59. |
The tendency to give up electrons is called- |
| A. | Oxidation |
| B. | Reduction |
| C. | Catalysis |
| D. | Motivation |
| Answer» B. Reduction | |
| 60. |
Oxygenation is a chemical reaction in which |
| A. | The electron is discarded. |
| B. | Oxygen is a combination. |
| C. | The ratio of the positive group increases. |
| D. | All of the above |
| Answer» E. | |
| 61. |
What is the basic element of all organic compounds? |
| A. | Nitrogen |
| B. | Oxygen |
| C. | Carbon |
| D. | Sulfur |
| Answer» D. Sulfur | |
| 62. |
What is Neela Thoth? |
| A. | Copper sulphate |
| B. | Calcium sulfate |
| C. | Iron sulfate |
| D. | sodium sulfate |
| Answer» B. Calcium sulfate | |
| 63. |
Bronze is an alloy of |
| A. | Copper and zinc |
| B. | Copper and Lead |
| C. | Copper and Tin |
| D. | Copper and Silver |
| Answer» D. Copper and Silver | |
| 64. |
Limestone on decomposition gives_______and carbon dioxide. |
| A. | Calcium hydrogen carbonate |
| B. | Calcium carbonate |
| C. | Calcium hydroxide |
| D. | Calcium oxide |
| Answer» E. | |
| 65. |
In which process is a protective zinc coating applied on iron to prevent it from rusting? |
| A. | Galvanisation |
| B. | Annealing |
| C. | Smelting |
| D. | Welding |
| Answer» B. Annealing | |
| 66. |
Which of the following compound contains only Carbon and Hydrogen atoms in their formation? |
| A. | Chloroform |
| B. | Teflon |
| C. | Ethanol |
| D. | Benzene |
| Answer» E. | |
| 67. |
Methane an air pollutant is produced ___________ |
| A. | by burning of coal in insuf cient air |
| B. | by digestion of food by animals |
| C. | by action of ultraviolet light on nitrogenous compounds. |
| D. | as a by-product of manufacturing ammoniacal fertilizers |
| Answer» C. by action of ultraviolet light on nitrogenous compounds. | |
| 68. |
Which energy is converted into electrical energy by a solar cell? |
| A. | Chemical Energy |
| B. | Nuclear energy |
| C. | Solar energy |
| D. | Magnetic energy |
| Answer» D. Magnetic energy | |
| 69. |
In which state of matter, the distance between the molecules is minimum ? |
| A. | Solid |
| B. | Liquid |
| C. | Gas |
| D. | Plasma |
| Answer» B. Liquid | |