MCQOPTIONS
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MCQOPTIONS
This section includes 621 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge (GK) knowledge and support exam preparation. Choose a topic below to get started.
| 501. |
Aluminium salt commonly used to stop bleeding is - |
| A. | Aluminium nitrate |
| B. | Aluminium sulphate |
| C. | Aluminium Chloride |
| D. | Potash alum |
| Answer» C. Aluminium Chloride | |
| 502. |
The chemical used for cloud seeding for artificial rains is - |
| A. | Silver Nitrate |
| B. | Potassium Bromide |
| C. | Silver Iodide |
| D. | Potassium Nitrate |
| Answer» D. Potassium Nitrate | |
| 503. |
Which among the following metals provides amphoteric oxide? |
| A. | Sodium |
| B. | Silver |
| C. | Aluminium |
| D. | Calcium |
| Answer» D. Calcium | |
| 504. |
The ultrapure metal is obtained by - |
| A. | Calcination |
| B. | Sublimation |
| C. | zone refining |
| D. | None of these |
| Answer» D. None of these | |
| 505. |
Which of the following elements is obtained from sea weeds? |
| A. | Argon |
| B. | Sulphur |
| C. | Vanadium |
| D. | Iodine |
| Answer» E. | |
| 506. |
Which of the following is a mono- atomic gas? |
| A. | Oxygen |
| B. | Neon |
| C. | Nitrogen |
| D. | Fluorine |
| Answer» C. Nitrogen | |
| 507. |
Oxide of sulphur present in the atmosphere are washed down by rains to cause |
| A. | Depletion of fossil fuel reserves |
| B. | Eutrophication in lakes |
| C. | Lowering of pH of soil |
| D. | Industrial smog formation |
| Answer» B. Eutrophication in lakes | |
| 508. |
What is the most common salt in sea water? |
| A. | Calcium carbonate |
| B. | Potassium chloride |
| C. | Sodium chloride |
| D. | Magnesium sulphate |
| Answer» D. Magnesium sulphate | |
| 509. |
Which of the following is used to iodise common salt? |
| A. | Potassium iodide |
| B. | Iodine |
| C. | Potassium iodate |
| D. | Sodium iodide |
| Answer» D. Sodium iodide | |
| 510. |
Heavy water is so called because it contains - |
| A. | Heavy isotope of hydrogen |
| B. | Heavy isotope of oxygen |
| C. | Mole number of hydrogen atoms |
| D. | Mole number of oxygen atoms |
| Answer» B. Heavy isotope of oxygen | |
| 511. |
The chemical name of rat poison is - |
| A. | zinc oxide |
| B. | potassium cyanide |
| C. | lead nitrate |
| D. | zinc phosphide |
| Answer» E. | |
| 512. |
Sulphur dioxide level in the atmosphere can be reduced by using - |
| A. | more efficient car engines |
| B. | catalytic converters in industry |
| C. | static electricity to attract it in factory chimneys |
| D. | low - sulphur fuels |
| Answer» E. | |
| 513. |
Chemical composition of heavy water is |
| A. | H2O2 |
| B. | H2O |
| C. | HDO |
| D. | D2O |
| Answer» E. | |
| 514. |
Who proposed first atomic theory? |
| A. | E. Rutherford |
| B. | De Broglie |
| C. | John Dalton |
| D. | D. I. Mendeleev |
| Answer» D. D. I. Mendeleev | |
| 515. |
A solution turns blue litmus red, its pH is likely to be - |
| A. | 11 |
| B. | 9 |
| C. | 5 |
| D. | 10 |
| Answer» D. 10 | |
| 516. |
An atomic clock is based on transitions in - |
| A. | Sodium |
| B. | Caesium |
| C. | Magnesium |
| D. | Aluminium |
| Answer» C. Magnesium | |
| 517. |
What is the common name of CaOCI2? |
| A. | Baking Powder |
| B. | Baking Soda |
| C. | Bleaching Powder |
| D. | Washing Soda |
| Answer» D. Washing Soda | |
| 518. |
If a solution turns blue litmus red, its pH is likely to be : |
| A. | 7 |
| B. | 8 |
| C. | 9 |
| D. | 6 |
| Answer» E. | |
| 519. |
The chemical name for common salt - |
| A. | Sodium chloride |
| B. | Sodium hydroxide |
| C. | Sodium chlorate |
| D. | Potasium chloride |
| Answer» B. Sodium hydroxide | |
| 520. |
If water smells bad, then that odour can be removed by adding - |
| A. | alum |
| B. | bleach |
| C. | activated carbon |
| D. | deactivated nitrogen |
| Answer» D. deactivated nitrogen | |
| 521. |
The presence of which of the following salts in water causes corrosion in steam boilers? |
| A. | Sodium Chloride |
| B. | Magnesium Chloride |
| C. | Calcium bicarbonate |
| D. | Potassium bicarbonate |
| Answer» C. Calcium bicarbonate | |
| 522. |
Haemoglobin is used to transport in humans. |
| A. | Oxygen |
| B. | Carbon Dioxide |
| C. | Both are correct |
| D. | Both are incorrect |
| Answer» B. Carbon Dioxide | |
| 523. |
The fuel in atomic pile is - |
| A. | carbon |
| B. | sodium |
| C. | petroleum |
| D. | uranium |
| Answer» E. | |
| 524. |
Which one of the following substances does not have a melting point? |
| A. | Bromine |
| B. | Sodium chloride |
| C. | Mercury |
| D. | Glass |
| Answer» D. Glass | |
| 525. |
Which of the following processes is used for the production of Biodiesel? |
| A. | Transamination |
| B. | Transcription |
| C. | Transesterification |
| D. | Translation |
| Answer» D. Translation | |
| 526. |
The rate of change of linear momentum of a body falling freely under gravity is equal to it's |
| A. | Kinetic Energy |
| B. | Weight |
| C. | Potential Energy |
| D. | Impulse |
| Answer» C. Potential Energy | |
| 527. |
Which of the following substances undergoes chemical change on heating? |
| A. | Sodium chloride |
| B. | Silica |
| C. | Lead nitrate |
| D. | Platinum wire |
| Answer» D. Platinum wire | |
| 528. |
Which of the following metals is used in Space Crafts to withstand high temperatures? |
| A. | Fe |
| B. | Ti |
| C. | Ni |
| D. | Pb |
| Answer» C. Ni | |
| 529. |
What is a common name for the substance which irritates lachrymal glands? |
| A. | Tear Gas |
| B. | Laughing Gas |
| C. | Anaesthetic Gas |
| D. | Noble Gas |
| Answer» B. Laughing Gas | |
| 530. |
The process of covering water pipes made of Iron with Zinc layer to prevent corrosion is called |
| A. | Zinc plating |
| B. | Alloy formation |
| C. | Vulcanization |
| D. | Galvanization |
| Answer» E. | |
| 531. |
What material is used to make electric heater coil? |
| A. | Copper |
| B. | Iron |
| C. | Silver |
| D. | Nichrome |
| Answer» E. | |
| 532. |
In vulcanisation process, rubber can be hardened by adding - |
| A. | Nitrogen |
| B. | Silicon |
| C. | Sulphur |
| D. | Alcohol |
| Answer» D. Alcohol | |
| 533. |
Which of the following metals has least, melting point? |
| A. | Gold |
| B. | Silver |
| C. | Mercury |
| D. | Copper |
| Answer» D. Copper | |
| 534. |
There are some substances whose odor changes in acidic or basic media. These are called - |
| A. | Olfactory indicators |
| B. | Litmus indicator |
| C. | Gustatory indicators |
| D. | All of the above |
| Answer» B. Litmus indicator | |
| 535. |
The polymerisation of which of the Following is used in manufacturing of polythene in industry? |
| A. | Methane |
| B. | Styrene |
| C. | Acetylene |
| D. | Ethylene |
| Answer» E. | |
| 536. |
Thissubstance is commonly used in the kitchen for making tasty crispy pakoras and is sometimes added for faster cooking. Which of the following is it? |
| A. | Baking soda |
| B. | Bleaching powder |
| C. | Vinegar |
| D. | Artificial sweeteners |
| Answer» B. Bleaching powder | |
| 537. |
In vulcanization, natural rubber is heated with- |
| A. | Carbon |
| B. | Sulphur |
| C. | Silicon |
| D. | Phosphorus |
| Answer» C. Silicon | |
| 538. |
Superconductivity is a material property associated with - |
| A. | cooling a substance without a phase change |
| B. | frictionless liquid flow |
| C. | a loss of thermal resistance |
| D. | a loss of electrical resistance |
| Answer» D. a loss of electrical resistance | |
| 539. |
Which one of the following has the highest fuel value? |
| A. | Hydrogen |
| B. | Charcoal |
| C. | Natural gas |
| D. | Gasoline |
| Answer» B. Charcoal | |
| 540. |
The heat value of combustion of Gasoline is - |
| A. | 12600 kJ/kg |
| B. | 14600 kJ/kg |
| C. | 39400 kJ/kg |
| D. | 47000 kJ/kg |
| Answer» E. | |
| 541. |
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 | |
| 542. |
The metal that is used as a catalyst in the hydrogenation of oils is - |
| A. | Pb |
| B. | Ni |
| C. | Cu |
| D. | Pt |
| Answer» C. Cu | |
| 543. |
The catalyst used in hydrogenation of oils is - |
| A. | Fe |
| B. | V2O5 |
| C. | Ni |
| D. | O2 |
| Answer» D. O2 | |
| 544. |
Glycol is added to aviation gasoline because it - |
| A. | reduces evaporation of petrol |
| B. | increases efficiency of petrol |
| C. | prevents freezing of petrol |
| D. | reduces consumption of petrol |
| Answer» D. reduces consumption of petrol | |
| 545. |
Natural rubber is a polymer derived from - |
| A. | ethylene |
| B. | propylene |
| C. | isoprene |
| D. | butadiene |
| Answer» D. butadiene | |
| 546. |
An alloy used in making heating elements for electric heating device is - |
| A. | Solder |
| B. | Alloy Steel |
| C. | Nichrome |
| D. | German Silver |
| Answer» D. German Silver | |
| 547. |
The metal, used to galvanise iron to protect it from rusting is - |
| A. | Zine |
| B. | Chromium |
| C. | Lead |
| D. | Antimony |
| Answer» B. Chromium | |
| 548. |
Which of the following is chiefly present in LPG (Liquefied Petroleum Gas)? |
| A. | Methane |
| B. | Ethane |
| C. | Propane |
| D. | Butane |
| Answer» E. | |
| 549. |
Which of the following is used to increase the anti-knocking property of petrol? |
| A. | Tetramethyl lead |
| B. | Tetraethyl lead |
| C. | nimethyl lead |
| D. | Triethyl lead |
| Answer» C. nimethyl lead | |
| 550. |
Freon' used as refrigerants is chemically known as - |
| A. | chlorinated hydrocarbon |
| B. | fluorinated hydrocarbon |
| C. | chlorofluoro hydrocarbon |
| D. | fluorinated aromatic compound |
| Answer» D. fluorinated aromatic compound | |