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.
| 251. |
What is the name of that system, which uses radioactivity to decide the period of materials of-prehistoric period? |
| A. | Radium dating |
| B. | Uranium dating |
| C. | Carbon dating |
| D. | Deuterium dating |
| Answer» D. Deuterium dating | |
| 252. |
The name of the scientist who discovered neutron is - |
| A. | Fermi |
| B. | Rutherford |
| C. | Chadwick |
| D. | Bohr |
| Answer» D. Bohr | |
| 253. |
Which metal is heaviest - |
| A. | osmium |
| B. | mercury |
| C. | iron |
| D. | nickel |
| Answer» B. mercury | |
| 254. |
Which among the following is liquid non-metal? |
| A. | Mercury |
| B. | Bromine |
| C. | Water |
| D. | Alcohol |
| Answer» C. Water | |
| 255. |
The chemicals most commonly used for cloud seeding or artificial rainmaking' is/are |
| A. | Silver Iodide |
| B. | Sodium Chloride |
| C. | Dry ice or frozen carbon dioxide |
| D. | (4) All the above |
| Answer» B. Sodium Chloride | |
| 256. |
Magnetism at the centre of a bar magnet is - |
| A. | minimum |
| B. | maximum |
| C. | zero |
| D. | minimum or maximum |
| Answer» D. minimum or maximum | |
| 257. |
Atomic explosion is triggered by - |
| A. | thermo nuclear reaction |
| B. | chemical reaction |
| C. | controlled chain reaction |
| D. | uncontrolled chain reaction |
| Answer» E. | |
| 258. |
Who developed atom bomb? |
| A. | Warn& Wan Brown |
| B. | J. Robert Openheimer |
| C. | Edward Taylor |
| D. | Samuel Koehen |
| Answer» C. Edward Taylor | |
| 259. |
Hydrogen bomb is based upon the principle of . |
| A. | Nuclear fission |
| B. | Nuclear fusion |
| C. | Controller nuclear reaction |
| D. | None of these |
| Answer» C. Controller nuclear reaction | |
| 260. |
Which element behaves chemically both as metal and nonmetal? |
| A. | Argon |
| B. | Boron |
| C. | Xenon |
| D. | Carbon |
| Answer» C. Xenon | |
| 261. |
Silk fibre chemically is |
| A. | Carbohydrate |
| B. | Fat |
| C. | Protein |
| D. | Cellulose |
| Answer» D. Cellulose | |
| 262. |
Neutron was discovered by - |
| A. | Chadwick |
| B. | Rutherford |
| C. | Fermi |
| D. | Bohr |
| Answer» B. Rutherford | |
| 263. |
The metallic Constituents of hard water are |
| A. | Magnesium, calcium and tin |
| B. | Iron, tin and calcium |
| C. | Calcium, magnesium and iron |
| D. | Magnesium, tin and iron |
| Answer» D. Magnesium, tin and iron | |
| 264. |
Type metal used in printing press is an alloy of - |
| A. | lead and copper |
| B. | lead and antimony |
| C. | lead and bismuth |
| D. | lead and zinc |
| Answer» C. lead and bismuth | |
| 265. |
Which of the following alloy is used in making magnet? |
| A. | Duralumin |
| B. | Stainless steel |
| C. | Elniko |
| D. | Magnalium |
| Answer» D. Magnalium | |
| 266. |
The most suitable unit for expressing nuclear radius is - |
| A. | nanometre |
| B. | fermi |
| C. | angstrom |
| D. | micron |
| Answer» C. angstrom | |
| 267. |
Nuclear fission is caused by the impact of. |
| A. | Proton |
| B. | Electron |
| C. | Neutron |
| D. | (1) and (b) |
| Answer» D. (1) and (b) | |
| 268. |
'Monazite' is an ore of - |
| A. | Sodium |
| B. | Titaniurm |
| C. | Thorium |
| D. | Zirconium |
| Answer» D. Zirconium | |
| 269. |
The polymer obtained by the condensation of hexamethylene diamine and adipic acid is |
| A. | Nylon 66 |
| B. | Terylene |
| C. | Tollen's |
| D. | Bakelite |
| Answer» B. Terylene | |
| 270. |
Philosopher's Wool is - |
| A. | Zinc carbonate |
| B. | Zinc sulphate |
| C. | Zinc oxide |
| D. | Zinc blende |
| Answer» D. Zinc blende | |
| 271. |
The highest volume of gases in lower atmosphere is comprised of - |
| A. | Hydrogen |
| B. | Carbon dioxide |
| C. | Oxygen |
| D. | Nitrogen |
| Answer» E. | |
| 272. |
The temperature of oxyacetylene flame is around |
| A. | 2800 C |
| B. | 3200 C |
| C. | 4000 C |
| D. | 1500 C |
| Answer» C. 4000 C | |
| 273. |
Photo chemical smog is a result-ant of the reaction among |
| A. | High concentration of NO2, O3, and CO in the evening |
| B. | CO, CO2 and NO2 at low temperature |
| C. | CO, O2 and peroxy acetyl nitrate in the presence of Sunlight |
| D. | NO2, O3 and peroxy acetyl nitrate in the presence of Sunlight |
| Answer» E. | |
| 274. |
Nuclear sizes are expressed in a unit named - |
| A. | Fermi |
| B. | Angstrom |
| C. | Newton |
| D. | Tesla |
| Answer» B. Angstrom | |
| 275. |
During the formation of a chemical bond - |
| A. | energy decreases |
| B. | energy increases |
| C. | energy of the system does not change |
| D. | electron-electron repulsion becomes more than the nucleus-electron attraction |
| Answer» B. energy increases | |
| 276. |
Isobar is produced by the emission of which of the following? |
| A. | X-ray |
| B. | Gamma ray |
| C. | Beta ray |
| D. | Alpha ray |
| Answer» D. Alpha ray | |
| 277. |
Which one of the following minerals is found in Monazite sand? |
| A. | Potassium |
| B. | Uranium |
| C. | Thorium |
| D. | Sodium |
| Answer» D. Sodium | |
| 278. |
Fission and fusion are called - |
| A. | molecular reactions |
| B. | potential reactions |
| C. | nuclear reactions |
| D. | heat reactions |
| Answer» D. heat reactions | |
| 279. |
The gas dissolved in water that makes it basic is |
| A. | ammo |
| B. | sulphur dioxide |
| C. | hydrogen |
| D. | carbon dioxide |
| Answer» C. hydrogen | |
| 280. |
The temperature at which both the Fahrenheit and Centigrade scales have the same value is |
| A. | -60 |
| B. | -40 |
| C. | -20 |
| D. | 0 |
| Answer» C. -20 | |
| 281. |
Why is water not suitable for putting out a petrol fire? |
| A. | The oxygen content of water is isolated by petrol and thus it helps in burning |
| B. | Petrol is too inflammable to be extinguished by water |
| C. | The heat required for combustion of petrol is very low |
| D. | Water, being heavy, slips below petrol which thus remains in contact with air and burns |
| Answer» E. | |
| 282. |
An antiknock for petrol is - |
| A. | sodium hydroxide |
| B. | ethanol |
| C. | sodium benzoate |
| D. | lead tetraethyl |
| Answer» E. | |
| 283. |
Soldering of two metals is possible because of the property of |
| A. | Viscosity |
| B. | Osmosis |
| C. | Cohesion |
| D. | Surface tension |
| Answer» D. Surface tension | |
| 284. |
Fuse wire is made of an alloy of . |
| A. | Lead and Copper |
| B. | Tin and Copper |
| C. | Tin and Lead |
| D. | Copper and Silver |
| Answer» D. Copper and Silver | |
| 285. |
The commonly used safety fuse-wire is made of - |
| A. | an alloy of Nickel and Lead |
| B. | an alloy of Tin and Lead |
| C. | an alloy of Tin and Nickel |
| D. | an alloy of Lead and Iron |
| Answer» C. an alloy of Tin and Nickel | |
| 286. |
Which have the maximum density? |
| A. | Water |
| B. | Benzene |
| C. | Ice |
| D. | Chloroform |
| Answer» B. Benzene | |
| 287. |
Which gas does not form the part, of atmosphere? |
| A. | Nitrogen |
| B. | Helium |
| C. | Chlorine |
| D. | None of the above |
| Answer» D. None of the above | |
| 288. |
Bee sting contains - |
| A. | An acidic liquid |
| B. | asalt solution |
| C. | an alkaline liquid |
| D. | acorrosive liquid |
| Answer» B. asalt solution | |
| 289. |
Which hydrocarbons are the major constituents of 'LPG'? |
| A. | Methane and Ethane |
| B. | Propane and Butane |
| C. | Pentane and Benzene |
| D. | Only Methane |
| Answer» C. Pentane and Benzene | |
| 290. |
The major component in the LPG is - |
| A. | methane |
| B. | butane |
| C. | ethane |
| D. | propane |
| Answer» C. ethane | |
| 291. |
The rusting of iron is a/an - |
| A. | physical change |
| B. | electrochemical change |
| C. | electrical change |
| D. | None of the above |
| Answer» C. electrical change | |
| 292. |
An electric iron has a heating element made of |
| A. | Copper |
| B. | Tungsten |
| C. | Nichrome |
| D. | Zinc |
| Answer» D. Zinc | |
| 293. |
Which one of the following does not form oxyacid? |
| A. | Sulphur |
| B. | Chlorine |
| C. | Nitrogen |
| D. | Fluorine |
| Answer» E. | |
| 294. |
Natural rubber is a polymer derived from? |
| A. | ethylene |
| B. | propylene |
| C. | isoprene |
| D. | butadiene |
| Answer» D. butadiene | |
| 295. |
The chemical name of "Hypo" commonly used in photography is |
| A. | Sodium thiosulphate |
| B. | Silver nitrate |
| C. | Sodium nitrate |
| D. | Silver iodide |
| Answer» B. Silver nitrate | |
| 296. |
The chemical name of 'Common salt' is |
| A. | Sodium chloride |
| B. | Sodium nitrate |
| C. | Ammonium chloride |
| D. | Calcium chloride |
| Answer» B. Sodium nitrate | |
| 297. |
A bee-sting leaves an acid which causes pain and irritation. |
| A. | The injected acid is - |
| B. | acetic acid |
| C. | sulphuric acid |
| D. | citric acid |
| Answer» E. | |
| 298. |
The chemical name of laughing gas is - |
| A. | Nitric oxide |
| B. | Nitrogen dioxide |
| C. | Nitrogen pentoxide |
| D. | Nitrous oxide |
| Answer» E. | |
| 299. |
Antacids are found in drugs that give relief to - |
| A. | Eye sight |
| B. | Stomach ache |
| C. | Acne |
| D. | Headache |
| Answer» C. Acne | |
| 300. |
The particle required to continue the chain process of Uranium fission is |
| A. | Electron |
| B. | Proton |
| C. | Neutron |
| D. | Positron |
| Answer» D. Positron | |