MCQOPTIONS
Saved Bookmarks
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.
| 401. |
The common refrigerant in domestic refrigerator is - |
| A. | Neon |
| B. | Oxygen |
| C. | Nitrogen |
| D. | Freon |
| Answer» E. | |
| 402. |
The gas causing acid rain in an industrial area is - |
| A. | Carbon dioxide |
| B. | Carbon monoxide |
| C. | Sulphur dioxide |
| D. | Methane |
| Answer» D. Methane | |
| 403. |
Radioactive elements emit |
| A. | Radiowaves |
| B. | Infrared waves |
| C. | Ultraviolet waves |
| D. | , and radiations |
| Answer» E. | |
| 404. |
Rcmoval of carbon particles from air involves the principle of |
| A. | Precipitation |
| B. | FiIteration |
| C. | Electrophoresis |
| D. | Sedimentation |
| Answer» D. Sedimentation | |
| 405. |
When iron rusts, its weight - |
| A. | decreases |
| B. | increases |
| C. | Constant |
| D. | None |
| Answer» C. Constant | |
| 406. |
Hydrochloric acid is also known as - |
| A. | Galic acid |
| B. | Picric acid |
| C. | Muriatic acid |
| D. | Chloric acid |
| Answer» D. Chloric acid | |
| 407. |
When iron rusts, its weight : |
| A. | decreases |
| B. | increases |
| C. | remains the same |
| D. | first increases and then decreases |
| Answer» C. remains the same | |
| 408. |
The anode of a dry cell is made up of - |
| A. | Iron |
| B. | Cadmium |
| C. | Zine |
| D. | Lead |
| Answer» D. Lead | |
| 409. |
Which of the following is also known as 'Galena'? |
| A. | Lead sulphate |
| B. | Lead oxide |
| C. | Lead sulphide |
| D. | Calcium sulphate |
| Answer» D. Calcium sulphate | |
| 410. |
Meson particles are found in- |
| A. | R-rays |
| B. | X-rays |
| C. | Laser beam |
| D. | Cosmic rays |
| Answer» E. | |
| 411. |
Which of the following particles has the dual nature of particle-wave? |
| A. | Electron |
| B. | Meson |
| C. | Proton |
| D. | Neutron |
| Answer» B. Meson | |
| 412. |
The mass number of a nucleus is - |
| A. | always less than its atomic number |
| B. | the sum of the number of protons and neutrons present in the nucleus |
| C. | always more than the atomic weight |
| D. | a fraction |
| Answer» C. always more than the atomic weight | |
| 413. |
The most electronegative element among the following is - |
| A. | sodium |
| B. | bromine |
| C. | fluorine |
| D. | oxygen |
| Answer» D. oxygen | |
| 414. |
Milk is an example of - |
| A. | suspension |
| B. | true solution |
| C. | emulsion |
| D. | gel |
| Answer» D. gel | |
| 415. |
The solid waste is also known as - |
| A. | Sedge |
| B. | Toxic waste |
| C. | Sludge |
| D. | Scrubber |
| Answer» D. Scrubber | |
| 416. |
The least preferred technique in the disposal of Municipal Solid Waste is - |
| A. | Incineration |
| B. | Composting |
| C. | Land filling |
| D. | Bricketting |
| Answer» E. | |
| 417. |
Fullerenes form a class of carbon allotropes. The first one to be identified was - |
| A. | C-59 |
| B. | C-60 |
| C. | C-61 |
| D. | C-69 |
| Answer» C. C-61 | |
| 418. |
Methanol cannot be dried with anhydrous CaCl2 because - |
| A. | CaCl2 dissolves in it |
| B. | it is not good dehydrating agent |
| C. | it forms a solid CaCl2 4CH3OH |
| D. | it reacts with CH3OH |
| Answer» D. it reacts with CH3OH | |
| 419. |
Which gas is used in fire extinguishers? |
| A. | Carbon dioxide |
| B. | Nitrogen oxide |
| C. | Carbon monoxide |
| D. | Sulpher dioxide |
| Answer» B. Nitrogen oxide | |
| 420. |
Which of the following fibres catches fire least? |
| A. | Nylon |
| B. | Cotton |
| C. | Rayon |
| D. | Terricot |
| Answer» C. Rayon | |
| 421. |
Which one of the following is responsible for the stimulating effect of tea? |
| A. | Tannin |
| B. | Steroid |
| C. | Alkaloid |
| D. | Flavonoid |
| Answer» D. Flavonoid | |
| 422. |
Which one of the following group of gases contribute to the "Green House Effect"? |
| A. | Carbon dioxide and Methane |
| B. | Ammonia and Ozone |
| C. | Carbon monoxide and Sulphur dioxide |
| D. | Carbon tetrailouride and Nitrous oxide |
| Answer» B. Ammonia and Ozone | |
| 423. |
Which one of the following contributes largely to the green house effect ? |
| A. | Ozone |
| B. | Carbon monoxide |
| C. | Carbon dioxide |
| D. | Water vapour |
| Answer» E. | |
| 424. |
Sodium Carbonate is commonly known as - |
| A. | Baking Soda |
| B. | Washing Soda |
| C. | Caustic Soda |
| D. | Caustic Potash |
| Answer» C. Caustic Soda | |
| 425. |
Diamond is the form of carbon that is - |
| A. | Crystalline |
| B. | Amorphous |
| C. | Chemical |
| D. | Alkaline |
| Answer» B. Amorphous | |
| 426. |
Wich of the following is a method/process of disposing of solid waste which cannot be re-used or recycled? |
| A. | Landfills |
| B. | Incineration |
| C. | Pyrolysis and Gasification |
| D. | An the above |
| Answer» E. | |
| 427. |
In a freezer ice cubes will be formed more quickly in trays made of - |
| A. | rubber |
| B. | plastic |
| C. | aluminium |
| D. | wood |
| Answer» D. wood | |
| 428. |
Wood Spirit is which of the following? |
| A. | Ethyl Alcohol |
| B. | Propanol |
| C. | Methyl Alcohol |
| D. | Butanol |
| Answer» D. Butanol | |
| 429. |
An emulsion is a colloidal solution of - |
| A. | Liquid in liquid |
| B. | Solid in liquid |
| C. | Gas in solid |
| D. | Solid in Solid |
| Answer» B. Solid in liquid | |
| 430. |
Which of the following metals occurs in free state? |
| A. | Copper |
| B. | Iron |
| C. | Zinc |
| D. | Lead |
| Answer» E. | |
| 431. |
Spirit in contact with body gives cool sensation because it is |
| A. | liquid |
| B. | transparent |
| C. | highly volatile |
| D. | a good conductor |
| Answer» D. a good conductor | |
| 432. |
Silver gets corroded due to in air. |
| A. | Oxygen |
| B. | Hydrogen Sulphide |
| C. | Carbon dioxide |
| D. | Nitrogen |
| Answer» C. Carbon dioxide | |
| 433. |
Which of the following acts as a resistance against disease in the body? |
| A. | Carbohydrates |
| B. | Red corpuscles |
| C. | Vitamins |
| D. | White corpuscles |
| Answer» E. | |
| 434. |
Iron and manganese present as pollutants in water cannot be re-moved by - |
| A. | oxidation followed by settling and filtration |
| B. | chlorination |
| C. | ion exchange process |
| D. | lime soda process or manganese zeolite process |
| Answer» C. ion exchange process | |
| 435. |
Which of the following gas is used in cigarette lighters? |
| A. | Butane |
| B. | Propane |
| C. | Methane |
| D. | Ethane |
| Answer» B. Propane | |
| 436. |
The major component of honey is - |
| A. | glucose |
| B. | sucrose |
| C. | maltose |
| D. | fructose |
| Answer» E. | |
| 437. |
Which halide is used in making sensitive emulsion on photographic film? |
| A. | Sodium chloride |
| B. | Silver bromide |
| C. | Silver iodide |
| D. | Silver chloride |
| Answer» C. Silver iodide | |
| 438. |
The element used for vulcanizing rubber is - |
| A. | Sulphur |
| B. | Bromine |
| C. | Silicon |
| D. | Phosphorus |
| Answer» B. Bromine | |
| 439. |
When Hydrogen starts burning in air, it produces? |
| A. | Ammonia |
| B. | Water |
| C. | Methane |
| D. | Carbonic Acid |
| Answer» C. Methane | |
| 440. |
Which of the following gases will effuse out of football bladder most wieldy? |
| A. | He |
| B. | H2 |
| C. | N2 |
| D. | 02 |
| Answer» C. N2 | |
| 441. |
The open "Sigrees or coal stoves often require fanning to sustain burning because of |
| A. | tendency of carbon dioxide to form a layer along with dust smoke |
| B. | lack of oxygen in the surroundings of sigrees |
| C. | accumulation of smoke and dust over the sigrees |
| D. | interrupted release of moisture from the material |
| Answer» B. lack of oxygen in the surroundings of sigrees | |
| 442. |
Chlorophyll is porphyrin containing - |
| A. | magnesium |
| B. | iron |
| C. | calcium |
| D. | (4) tin |
| Answer» B. iron | |
| 443. |
One light year is equal to - |
| A. | 9.46x 10 7m |
| B. | 9.46x 10 7m |
| C. | 9.46x 10 m |
| D. | 9.46x 10 m |
| Answer» C. 9.46x 10 m | |
| 444. |
A nibble is equal to |
| A. | 32 |
| B. | 4 |
| C. | 8 |
| D. | 16 |
| Answer» C. 8 | |
| 445. |
Sodium vapour lamps glow with yellow colour. This is due to - |
| A. | sublimation of sodium to emit yellow colour |
| B. | the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum |
| C. | the low ionisation energy of sodium |
| D. | its ability to absorb all other colours except yellow |
| Answer» C. the low ionisation energy of sodium | |
| 446. |
A body moving in a circular path with a constant speed has a - |
| A. | constant velocity |
| B. | constant acceleration |
| C. | constant kinetic energy |
| D. | constant displacement |
| Answer» D. constant displacement | |
| 447. |
The working of a dry cell is based on - |
| A. | Decomposition reaction |
| B. | Spontaneous oxidation-reduction reaction |
| C. | Combination reaction. |
| D. | Electrolysis |
| Answer» E. | |
| 448. |
PVC is formed by polymerization of - |
| A. | Styrene |
| B. | Acetylene |
| C. | Propene |
| D. | Vinyl Chloride |
| Answer» E. | |
| 449. |
Which of the following is used as filler in tyre of rubber? |
| A. | Carbon black |
| B. | Coal |
| C. | Coke |
| D. | Graphite |
| Answer» B. Coal | |
| 450. |
The addition of gypsum to port-land cement helps in : |
| A. | increasing the strength of cement |
| B. | rapid setting of cement |
| C. | preventing rapid setting of cement |
| D. | reduction in the cost of cement |
| Answer» D. reduction in the cost of cement | |