MCQOPTIONS
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MCQOPTIONS
This section includes 731 Mcqs, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
Isotones are those which have: |
| A. | Equal number of protons |
| B. | Equal number of neutrons |
| C. | Equal number of nucleons |
| D. | None of these |
| Answer» C. Equal number of nucleons | |
| 202. |
The radio isotope used to control the disease like blood cancer (Leukaemia) is: |
| A. | Phosphorus-32 |
| B. | Cobalt-60 |
| C. | Iodine-131 |
| D. | Sodium-24 |
| Answer» C. Iodine-131 | |
| 203. |
Which isotope is used through the radioactive age estimation technique to obtain (determine) the age of rocks? |
| A. | Uranium isotope |
| B. | Plutonium isotope |
| C. | Thorium isotope |
| D. | Carbon isotope |
| Answer» B. Plutonium isotope | |
| 204. |
What is the radioactive isotope of hydrogen is called? |
| A. | Deuterium |
| B. | Rotium |
| C. | Radium |
| D. | Tritium |
| Answer» E. | |
| 205. |
8O16, 8O17, 8O18 are called: |
| A. | Isotopes |
| B. | Isotones |
| C. | Isobars |
| D. | Isoneutrons |
| Answer» E. | |
| 206. |
Which of the following is not the isotope of hydrogen? |
| A. | Protium |
| B. | Deuterium |
| C. | Iterium |
| D. | Tritium |
| Answer» D. Tritium | |
| 207. |
The number of isotopes in the hydrogen: |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» C. 4 | |
| 208. |
Which of the following is estimated by the radio carbon dating? |
| A. | Age of the human being |
| B. | Age of the fossils |
| C. | Disease of the human body |
| D. | Purity of the metals |
| Answer» C. Disease of the human body | |
| 209. |
The group displacement law is propounded by: |
| A. | Sody & Fujan |
| B. | Rutherford & Sody |
| C. | Rutherford & Fujan |
| D. | Rutherford & Madam Curie |
| Answer» B. Rutherford & Sody | |
| 210. |
The isotope of any atomic nucleus is in which: |
| A. | Number of neutrons be same but number of protons be different |
| B. | Number of protons be same but the number of neutrons be different |
| C. | Number of protons and neutrons both are same |
| D. | Number of protons and neutrons both are different |
| Answer» C. Number of protons and neutrons both are same | |
| 211. |
The estimation of the age of the earth is done by: |
| A. | Uranium dating |
| B. | Carbon dating |
| C. | Atomic clock |
| D. | Bio clock |
| Answer» B. Carbon dating | |
| 212. |
The half life of a radioactive substance is 4 months then the time spent in decaying ¾th of the substance would be: |
| A. | 3 months |
| B. | 4 months |
| C. | 8 months |
| D. | 12 months |
| Answer» D. 12 months | |
| 213. |
The substance (element) obtained after emission of a beta-particle from 11Na22: |
| A. | Mg |
| B. | Mn |
| C. | Ag |
| D. | Pb |
| Answer» B. Mn | |
| 214. |
Which of the following is the unit of radioactivity? |
| A. | Curie |
| B. | Becquerel |
| C. | Rutherford |
| D. | All of these |
| Answer» C. Rutherford | |
| 215. |
Which of the following is not a radioactive element? |
| A. | Astatine |
| B. | Francium |
| C. | Titanium |
| D. | Zirconium |
| Answer» E. | |
| 216. |
How many charges alpha-rays consist of? |
| A. | Two unit positive charges |
| B. | Unit negative charge |
| C. | Unit positive charge |
| D. | None of these |
| Answer» B. Unit negative charge | |
| 217. |
Which of the following is negatively charged? |
| A. | Alpha-rays |
| B. | Beta-rays |
| C. | Gama-rays |
| D. | X-ray |
| Answer» B. Beta-rays | |
| 218. |
The penetrating power of which of the following invisible radiations emitting from the nucleus has its maximum value: |
| A. | a-rays |
| B. | f)-rays |
| C. | y-rays |
| D. | None of these |
| Answer» D. None of these | |
| 219. |
Who was the inventor of radioactivity? |
| A. | Madam Curie |
| B. | Irine Curie |
| C. | Henery Bacqurel |
| D. | Rutherford |
| Answer» D. Rutherford | |
| 220. |
The number of neutrons and protons in the nucleus of 88Ra226 are: |
| A. | 138 and 88 |
| B. | 88 and 138 |
| C. | 226 and 88 |
| D. | 88 and 226 |
| Answer» B. 88 and 138 | |
| 221. |
The atomic properties depend upon: |
| A. | Number of nucleons in the nucleus |
| B. | Number of protons in the nucleus |
| C. | Number of neutrons in the nucleus |
| D. | None of these |
| Answer» E. | |
| 222. |
Atom is electrically: |
| A. | Positive |
| B. | negative |
| C. | bipositive |
| D. | neutral |
| Answer» E. | |
| 223. |
The mass number of an atom is: |
| A. | Number of nucleons in the nucleus |
| B. | Number of protons in the nucleus |
| C. | Number of neutrons in the nucleus |
| D. | None of these |
| Answer» B. Number of protons in the nucleus | |
| 224. |
Nucleon is the name which is employed for: |
| A. | Electron and proton |
| B. | proton and neutron |
| C. | Electron and neutron |
| D. | None of these |
| Answer» C. Electron and neutron | |
| 225. |
The inventor of the atomic theory is: |
| A. | Rutherford |
| B. | Madam Curie |
| C. | John Dalton |
| D. | Albert Einstein |
| Answer» D. Albert Einstein | |
| 226. |
Who is known as the father of Modern Chemistry? |
| A. | Kolvey |
| B. | Wholer |
| C. | Leviatiae |
| D. | Pasteur. |
| Answer» D. Pasteur. | |
| 227. |
Which of the following indicator used in determination of hardness? |
| A. | EBT |
| B. | Phenolphthalein |
| C. | Methyl orange |
| D. | Methyl orange |
| Answer» B. Phenolphthalein | |
| 228. |
Which of the following treatment is used for removal of biological impurities? |
| A. | Sedimentation |
| B. | Boiling |
| C. | Sterilization |
| D. | distillation |
| Answer» D. distillation | |
| 229. |
Which of the following is not the components of photochemical smog that occurs in warm, dry and sunny climate? |
| A. | NO2 |
| B. | O3 |
| C. | SO3 |
| D. | Unsaturated hydrocarbon |
| Answer» D. Unsaturated hydrocarbon | |
| 230. |
Which of the following is not green house gas? |
| A. | CO |
| B. | O3 |
| C. | CH4 |
| D. | H2O Vapour |
| Answer» B. O3 | |
| 231. |
Eating tobacco and throwing on the road can produce______pollutant. |
| A. | Air |
| B. | Soil |
| C. | Noise |
| D. | Water |
| Answer» C. Noise | |
| 232. |
Green solvents are derived from ______. |
| A. | Renewable resources |
| B. | Carbon resources |
| C. | Non-renewable resources |
| D. | All of these |
| Answer» B. Carbon resources | |
| 233. |
Which of the following is used for clean oxidation? |
| A. | Supercritical carbon dioxide |
| B. | Supercritical hydrogen |
| C. | Aqueous hydrogen peroxide |
| D. | All of these |
| Answer» D. All of these | |
| 234. |
Which one of the following received the Greener Reaction Conditions Award in 1996? |
| A. | Dow Chemical |
| B. | Exon Chemicals |
| C. | US EPA |
| D. | None of these |
| Answer» B. Exon Chemicals | |
| 235. |
Consider following statements: I. Green chemistry focuses on effects of chemical pollutants on nature. II. Environmental chemistry focuses on technological approach to prevent pollution. Which statement(s) is/are correct? |
| A. | Only I |
| B. | Only I |
| C. | Both I & II |
| D. | Neither I nor II |
| Answer» E. | |
| 236. |
Which of the following is not a type of elements? |
| A. | Metals |
| B. | Non Metals |
| C. | Metalloids |
| D. | Gases |
| Answer» E. | |
| 237. |
The tendency to donate the electron is called: |
| A. | Oxidation |
| B. | Reduction |
| C. | catylisation |
| D. | self-induction |
| Answer» B. Reduction | |
| 238. |
In the exothermic reaction: |
| A. | Heat is absorbed |
| B. | Heat is evolved |
| C. | Heat doesn't change |
| D. | Temperature remains constant |
| Answer» C. Heat doesn't change | |
| 239. |
In the galvanic cell, the process takes place is: |
| A. | Transformation of the electrical energy into the chemical energy |
| B. | Transformation of the chemical energy into the electrical energy |
| C. | Transformation of light energy into the electrical energy |
| D. | Transformation of electrical energy into the light energy |
| Answer» C. Transformation of light energy into the electrical energy | |
| 240. |
The process of corrosiondoesn’t take place in which of the following metals, when these metals are left free in the air: |
| A. | Iron |
| B. | Copper |
| C. | Gold |
| D. | Silver |
| Answer» D. Silver | |
| 241. |
The iron container or vessel is galvanized by : |
| A. | Chromium |
| B. | Zinc |
| C. | Aluminium |
| D. | Nickel |
| Answer» C. Aluminium | |
| 242. |
Which of the following is utilized in the form of electrolyte of the dry cell (battery)? |
| A. | Ammonium chloride and zinc chloride |
| B. | Sodium chloride and calcium chloride |
| C. | Magnesium chloride and zinc chloride |
| D. | Ammonium chloride and calcium chloride |
| Answer» B. Sodium chloride and calcium chloride | |
| 243. |
In the process of electrolysis reduction occurs at : |
| A. | Cathode |
| B. | Anode |
| C. | Both of these |
| D. | None of these |
| Answer» B. Anode | |
| 244. |
In the process of electrolysis oxidation occurs at: |
| A. | Cathode |
| B. | Anode |
| C. | Both of these |
| D. | None of these |
| Answer» C. Both of these | |
| 245. |
The container employed in the process of electrolysis is called: |
| A. | Ammeter |
| B. | Voltmeter |
| C. | Voltammeter |
| D. | Calorimeter |
| Answer» D. Calorimeter | |
| 246. |
Which of the following is called philosopher's wool? |
| A. | Zinc bromide |
| B. | Zinc nitrate |
| C. | Zinc oxide |
| D. | Zinc chloride |
| Answer» D. Zinc chloride | |
| 247. |
What is the pH value of pure water? |
| A. | 6.4 |
| B. | 6.6 |
| C. | 7 |
| D. | 7.4 |
| Answer» D. 7.4 | |
| 248. |
The average pH value of the milk is: |
| A. | 6.1 |
| B. | 6.6 |
| C. | 7.4 |
| D. | 8 |
| Answer» C. 7.4 | |
| 249. |
The average pH value of the human blood is: |
| A. | 5.4 |
| B. | 6.2 |
| C. | 7.4 |
| D. | 8.7 |
| Answer» D. 8.7 | |
| 250. |
The first time pH value measurement is done by: |
| A. | Leviatiae |
| B. | Pristley |
| C. | Cauvendish |
| D. | Sorensan |
| Answer» E. | |