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.
| 351. |
Non-metallic oxides are in nature. |
| A. | Basic |
| B. | Acidic |
| C. | Neutral |
| D. | None of the above |
| Answer» C. Neutral | |
| 352. |
Which of the following imparts a blue colour to glass? |
| A. | Cobalt oxide |
| B. | Copper oxide |
| C. | Iron oxide |
| D. | Nickel oxide |
| Answer» B. Copper oxide | |
| 353. |
Which one of the following elements is metalloid? |
| A. | Si |
| B. | Pb |
| C. | Ge |
| D. | C |
| Answer» D. C | |
| 354. |
Which one of the following elements exhibits the greatest tendency to lose electrons? |
| A. | Fluorine |
| B. | Lithium |
| C. | Oxygen |
| D. | Zine |
| Answer» C. Oxygen | |
| 355. |
Hydrofluoric acid is not kept in glass bottles because it reacts with - |
| A. | visible light |
| B. | silicon dioxide of glass |
| C. | aluminium oxide of glass |
| D. | sodium oxide of glass |
| Answer» C. aluminium oxide of glass | |
| 356. |
What is a mixture of potassium nitrate powdered charcoal and sulfur called? |
| A. | paint |
| B. | aluminum |
| C. | brass |
| D. | gun powder |
| Answer» E. | |
| 357. |
Potassium Permanganate is used for purifying drinking water, because - |
| A. | it dissolves the impurities of water |
| B. | It is a sterilizing agent |
| C. | It is an oxidising agent |
| D. | It is a reducing agent |
| Answer» D. It is a reducing agent | |
| 358. |
Sulphur dioxide bleaches colouring matter by |
| A. | Reduction |
| B. | Dehydration |
| C. | Decomposition |
| D. | Oxidation |
| Answer» B. Dehydration | |
| 359. |
Which of the following gases is most toxic? |
| A. | Carbon dioxide |
| B. | Carbon monoxide |
| C. | Sulphur dioxide |
| D. | Chlorine |
| Answer» C. Sulphur dioxide | |
| 360. |
The nuclear reaction in which a heavy nucleus splits into two nuclei of nearly equal mass is called - |
| A. | Nuclear fusion |
| B. | Nuclear fission |
| C. | Nuclear reaction |
| D. | Fast breeding |
| Answer» C. Nuclear reaction | |
| 361. |
Liquid metal is - |
| A. | Mercury |
| B. | Sodium |
| C. | Antimony |
| D. | None |
| Answer» B. Sodium | |
| 362. |
The characteristic odour of garlic is due to - |
| A. | a chloro compound |
| B. | a sulphur compound |
| C. | a fluorine compound |
| D. | acetic acid |
| Answer» C. a fluorine compound | |
| 363. |
Who developed the model of atomic structure? |
| A. | Bohr and Rutherford |
| B. | Volta |
| C. | Alfred Nobel |
| D. | Faraday |
| Answer» B. Volta | |
| 364. |
Catalytic converters are generally made from |
| A. | Alkaline metals |
| B. | Hydrogen |
| C. | Transition metals |
| D. | Carbon |
| Answer» D. Carbon | |
| 365. |
Permanent - hardness of water may be removed by addition of |
| A. | Alum |
| B. | Sodium carbonate |
| C. | Lime |
| D. | Potassium Permangante |
| Answer» C. Lime | |
| 366. |
If lime water is kept in the air, it turns milky due to presence of |
| A. | Carbondioxide |
| B. | Nitrogen |
| C. | Oxygen |
| D. | Sulphurdioxide |
| Answer» B. Nitrogen | |
| 367. |
Sour taste of lemon is due to the presence of which of the follow-ing? |
| A. | Citric acid |
| B. | Acetic acid |
| C. | Oxalic acid |
| D. | Formic acid |
| Answer» B. Acetic acid | |
| 368. |
Which one of the following elements exists in liquid state at room temperature? |
| A. | Mercury |
| B. | Lead |
| C. | Sodium |
| D. | Calcium |
| Answer» B. Lead | |
| 369. |
Sour taste of 'Coca Cola' is due to the presence of |
| A. | acetic acid |
| B. | phosphoric acid |
| C. | hydrochloric acid |
| D. | formic acid |
| Answer» C. hydrochloric acid | |
| 370. |
Quartz is a crystalline form of - |
| A. | Alumina |
| B. | Glass |
| C. | Silica |
| D. | Limestone |
| Answer» D. Limestone | |
| 371. |
The liquid waste from kitchens and baths, of residences is known as: |
| A. | Domestic sewage |
| B. | Storm water |
| C. | Sullage |
| D. | Refuse |
| Answer» D. Refuse | |
| 372. |
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 | |
| 373. |
Rust is - |
| A. | A mixture of Fe O and Fe(OH) |
| B. | A mixture of FeO and Fe(OH) |
| C. | FeO only |
| D. | A mixture of Fe O , 3H O and FeO |
| Answer» E. | |
| 374. |
Which of the following is chief source of Naphthalene? |
| A. | Moth balls |
| B. | Moth flakes |
| C. | Tar Camphor |
| D. | Methyl Alcohol |
| Answer» D. Methyl Alcohol | |
| 375. |
The three elements most needed in common fertilizers are |
| A. | Sulphur, Phosphorous and Sodium |
| B. | Nitrogen, Phosphorous and Sodium |
| C. | Phosphorous, Sodium and Nitrogen |
| D. | Calcium, Phosphorous and Potassium |
| Answer» C. Phosphorous, Sodium and Nitrogen | |
| 376. |
The chief source of naphthalene is - |
| A. | Coal-tar |
| B. | Diesel |
| C. | Charcoal |
| D. | Camphor |
| Answer» B. Diesel | |
| 377. |
The Green House effect' is produced due to the presence of excess amount of |
| A. | Sulphur dioxide |
| B. | Nitrogen dioxide |
| C. | Carbon monoxide |
| D. | Methane |
| Answer» E. | |
| 378. |
Chemical name of Gammaxane is - |
| A. | Toluene |
| B. | Chloro benzene |
| C. | Aniline |
| D. | Benzene hexachloride |
| Answer» E. | |
| 379. |
The chemical name or Quartz is |
| A. | Calcium oxide |
| B. | Calcium phosphate |
| C. | Sodium phosphate |
| D. | Sodium silicate |
| Answer» E. | |
| 380. |
Epsom salt is used - |
| A. | as purgative |
| B. | in softening water |
| C. | in paper industry |
| D. | in making tooth paste |
| Answer» B. in softening water | |
| 381. |
Bleaching action of chlorine is by - |
| A. | decomposition |
| B. | hydrolysis |
| C. | reduction |
| D. | oxidation |
| Answer» E. | |
| 382. |
The green colour seen in firework displays is due to the chloride salt of |
| A. | Sodium |
| B. | Strontium |
| C. | Barium |
| D. | Calcium |
| Answer» D. Calcium | |
| 383. |
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 | |
| 384. |
Iron is extracted from - |
| A. | Cinnabar |
| B. | Haematite |
| C. | Bauxite |
| D. | Dolomite |
| Answer» C. Bauxite | |
| 385. |
Which one of the following is a major green gas? |
| A. | Carbon dioxide |
| B. | Chloro fluorocarbon |
| C. | Carbon monoxide |
| D. | Freon |
| Answer» B. Chloro fluorocarbon | |
| 386. |
Which of the following is a not a green house gas? |
| A. | Carbon Dioxide |
| B. | Water Vapour |
| C. | Carbon Monoxide |
| D. | Nitrous Oxide |
| Answer» D. Nitrous Oxide | |
| 387. |
The atmospheric gas that is mainly responsible for Green House effect |
| A. | Ozone |
| B. | Nitrogen |
| C. | Oxygen |
| D. | Carbondioxide |
| Answer» E. | |
| 388. |
Biogas majorly contains? |
| A. | Ethane |
| B. | Methane |
| C. | Hydrogen |
| D. | CO |
| Answer» C. Hydrogen | |
| 389. |
Copper is refined by - |
| A. | roasting |
| B. | oxidation |
| C. | electrolysis |
| D. | zone refining |
| Answer» B. oxidation | |
| 390. |
Biogas majorly contains - |
| A. | Ethane |
| B. | Methane |
| C. | Hydrogen |
| D. | CO |
| Answer» C. Hydrogen | |
| 391. |
`Milk of Magnesia' is a suspension of |
| A. | magnesium sulphate |
| B. | magnesium carbonate |
| C. | magnesium hydroxide |
| D. | magnesium chloride |
| Answer» D. magnesium chloride | |
| 392. |
Newlands' table, the elements were placed with the halogens - |
| A. | Mn and As |
| B. | Fe and Se |
| C. | Ce and La |
| D. | Co and Ni |
| Answer» E. | |
| 393. |
The nuclear particle having no mass and no charge, but only spin is - |
| A. | proton |
| B. | neutrino |
| C. | meson |
| D. | electron |
| Answer» C. meson | |
| 394. |
The electronic configuration of an atom having atomic number `20' is |
| A. | 2, 8, 10 |
| B. | 2, 6, 8, 4 |
| C. | 2, 8, 8, 2 |
| D. | 2, 10, 8 |
| Answer» D. 2, 10, 8 | |
| 395. |
In which of the following states maximum iron are is found? |
| A. | FeCO3 |
| B. | Fe2O3 |
| C. | Fe3O4 |
| D. | FeS2 |
| Answer» C. Fe3O4 | |
| 396. |
The smallest particle of an element is called - |
| A. | Ion |
| B. | Electron |
| C. | Atom |
| D. | Molecule |
| Answer» D. Molecule | |
| 397. |
Threshold limit value of copper in the atmospheric air is - |
| A. | 0.001 mg/m3 |
| B. | 0.01 mg/m3 |
| C. | 1.0 mg/m3 |
| D. | 5.0 mg/m3 |
| Answer» D. 5.0 mg/m3 | |
| 398. |
The lightest radioactive element is - |
| A. | deuterium |
| B. | polonium |
| C. | technetium |
| D. | uranium |
| Answer» D. uranium | |
| 399. |
Which one of the following is a micro- element? |
| A. | Chlorine |
| B. | Hydrogen |
| C. | Nitrogen |
| D. | Oxygen |
| Answer» B. Hydrogen | |
| 400. |
Which of the following elements is not radioactive? |
| A. | Radium |
| B. | Plutonium |
| C. | Zirconium |
| D. | Uranium |
| Answer» D. Uranium | |