MCQOPTIONS
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MCQOPTIONS
This section includes 259 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
The mineral element which is essential in nitrogen fixation is |
| A. | Zn |
| B. | Cu |
| C. | Mo |
| D. | B |
| Answer» D. B | |
| 152. |
The decreasing order of catenation of group 16 element is |
| A. | S>Se>O>Te |
| B. | O>S>Se>Te |
| C. | O>S>Te>Se |
| D. | S>O>Se>Te |
| Answer» B. O>S>Se>Te | |
| 153. |
The name hydrogen was proposed by |
| A. | Bohr |
| B. | Rutherford |
| C. | Lavosier |
| D. | Cavendish |
| Answer» D. Cavendish | |
| 154. |
The ease of liquefication of noble gas decreases in the order |
| A. | Xe > Kr > Ar > Ne > He |
| B. | He > Ne > Ar > Kr > Xe |
| C. | Ar > Kr > Xe > He > Ne |
| D. | Kr > Xe > He > Ar = Ne |
| Answer» B. He > Ne > Ar > Kr > Xe | |
| 155. |
The first ever compound of noble gas was prepared by |
| A. | Ramsay |
| B. | Bartlett |
| C. | Berzelius |
| D. | Cavendish |
| Answer» C. Berzelius | |
| 156. |
Which one is the most abundant on the earth crust ? |
| A. | Al |
| B. | B |
| C. | In |
| D. | Ga |
| Answer» B. B | |
| 157. |
Which of the following exhibits inert pair effect ? |
| A. | B |
| B. | AI |
| C. | TI |
| D. | Sc |
| Answer» D. Sc | |
| 158. |
The chief one of aluminium is |
| A. | Kaolin |
| B. | Feldspar |
| C. | Cryolite |
| D. | Bauxite |
| Answer» E. | |
| 159. |
Which of the following metals are extracted by electrolytic reaction method ? |
| A. | Al |
| B. | Ag |
| C. | Cu |
| D. | Fe |
| Answer» B. Ag | |
| 160. |
Aluminium appears like gold when it is mixed with |
| A. | 90 % Cu |
| B. | 50 % Ni |
| C. | 90 % Sn |
| D. | 50 % Co |
| Answer» B. 50 % Ni | |
| 161. |
The oxidation state of oxygen in O |
| A. | +1 |
| B. | -2 |
| C. | +2 |
| D. | +4 |
| Answer» B. -2 | |
| 162. |
Which of the following is used as an antiseptic ? |
| A. | I |
| B. | F |
| C. | Br |
| D. | CI |
| Answer» B. F | |
| 163. |
Which of the following is the second most abundant element in the earth's crust |
| A. | Silicon |
| B. | Carbon |
| C. | Nitrogen |
| D. | Oxygen |
| Answer» B. Carbon | |
| 164. |
Photographic plates are coated with a film of |
| A. | AgCl |
| B. | AgBr |
| C. | Agl |
| D. | AgNO |
| E. | <sub>3</sub> |
| Answer» C. Agl | |
| 165. |
The superior type of Laboratory apparatus are made of |
| A. | Sodalime glass |
| B. | Hard glass |
| C. | Fline glass |
| D. | Pyrex glass |
| Answer» E. | |
| 166. |
The radioactive noble gas is |
| A. | He |
| B. | Xe |
| C. | Rn |
| D. | Ne |
| Answer» D. Ne | |
| 167. |
Which of the following compounds is formed in the borax bead test ? |
| A. | Metal metaborate |
| B. | Boron oxide |
| C. | Metal boride |
| D. | Metallic boron |
| Answer» B. Boron oxide | |
| 168. |
Cryolite is mineral used for extraction of |
| A. | Ca |
| B. | Cu |
| C. | Al |
| D. | Fe |
| Answer» D. Fe | |
| 169. |
Synthetic gas is a mixture of |
| A. | Steam and carbon monoxide |
| B. | Carbon monoxide and nitrogen |
| C. | Hydrogen and methane |
| D. | Hydrogen and carbon monoxide |
| Answer» E. | |
| 170. |
Which of the fuel gases has composition by volume 34% CH |
| A. | Oil gas |
| B. | Petrol gas |
| C. | Coal gas |
| D. | Water gas |
| Answer» D. Water gas | |
| 171. |
Activated charcoal is employed to remove colouring matter from pure substance, it works by |
| A. | Bleaching |
| B. | Oxidation |
| C. | Reduction |
| D. | Adsorption |
| Answer» E. | |
| 172. |
Ozone may not act as |
| A. | Bleaching agent |
| B. | Dehydrating agent |
| C. | Oxidising agent |
| D. | Reducing agent |
| Answer» C. Oxidising agent | |
| 173. |
Germenium is an example of |
| A. | An intrinsic semiconductor |
| B. | An n-type semiconductor |
| C. | A p-type semiconductor |
| D. | An insulator |
| Answer» B. An n-type semiconductor | |
| 174. |
Which one of the following is most reactive ? |
| A. | White phosphorus |
| B. | Black phosphorus |
| C. | Violet phosphorus |
| D. | Scarlet phosphorus |
| Answer» B. Black phosphorus | |
| 175. |
Which is the catalyst used in manufacture of sulphuric acid by lead chamber process ? |
| A. | Fe |
| B. | Ni |
| C. | Pb |
| D. | Oxides of nitrogen |
| Answer» E. | |
| 176. |
Percentage of lead in lead pencil is |
| A. | Zero |
| B. | 20 |
| C. | 40 |
| D. | 80 |
| Answer» B. 20 | |
| 177. |
Phosphorus is kept in |
| A. | Cold water |
| B. | Kerosene oil |
| C. | Alcohol |
| D. | Ammonia |
| Answer» B. Kerosene oil | |
| 178. |
Which element is most abundant on earth's crust ? |
| A. | Ca |
| B. | C |
| C. | Si |
| D. | O |
| Answer» E. | |
| 179. |
Which one of the following has highest ionization energy ? |
| A. | O |
| B. | S |
| C. | Se |
| D. | Te |
| Answer» B. S | |
| 180. |
Oxygen molecule shows |
| A. | Diamagnetism |
| B. | Paramagnetism |
| C. | Feromagnetism |
| D. | Ferrimagnetism |
| Answer» C. Feromagnetism | |
| 181. |
Bleaching action of SO |
| A. | Oxidation |
| B. | Reduction |
| C. | Hydrolysis |
| D. | Electrolysis |
| Answer» C. Hydrolysis | |
| 182. |
Which variety of glass is used for the manufacture of optical glasses |
| A. | Sodium glass |
| B. | Flint glass |
| C. | Ground glass |
| D. | quartz |
| Answer» C. Ground glass | |
| 183. |
The process of slow and homogeneous cooling of glass is called |
| A. | Etching of glass |
| B. | Annealing of glass |
| C. | Enamelling of glass |
| D. | Denitrification of glass |
| Answer» C. Enamelling of glass | |
| 184. |
Boron halides behave as Lewis base, because of their |
| A. | Electron deficient nature |
| B. | Acidic nature |
| C. | Ionic nature |
| D. | Covalent nature |
| Answer» B. Acidic nature | |
| 185. |
the variety of Coal having the highest carbon content is |
| A. | Anthracite |
| B. | Bituminous |
| C. | Lignite |
| D. | Peat |
| Answer» B. Bituminous | |
| 186. |
Bromine is obtained on a commercial scale from |
| A. | Caliche |
| B. | Carnallite |
| C. | Common salt |
| D. | Cyrolite |
| Answer» C. Common salt | |
| 187. |
Which of the following alloy is used for making magnets for hearing aids ? |
| A. | Invar |
| B. | German silver |
| C. | Monel metal |
| D. | Alinco |
| Answer» E. | |
| 188. |
Chlorine is manufactured by |
| A. | Birkeland and Eyde process |
| B. | Deacon's process |
| C. | Bosch process |
| D. | Solvay's process |
| Answer» C. Bosch process | |
| 189. |
The element which exhibit maximum cationation property |
| A. | C |
| B. | Si |
| C. | Ge |
| D. | Pb |
| Answer» B. Si | |
| 190. |
Which of the following is an excellent conductor of heat and electricity ? |
| A. | Phosphorus |
| B. | Antimony |
| C. | Bismuth |
| D. | Silicon |
| Answer» D. Silicon | |
| 191. |
Which of the following is not an ore of boron ? |
| A. | Kernite |
| B. | Feldspar |
| C. | Colemanite |
| D. | Borax |
| Answer» C. Colemanite | |
| 192. |
The nitrogen percentage is the highest in the fertilizer |
| A. | Ammonium nitrate |
| B. | Ammonium sulphate |
| C. | Calcium cyanamide |
| D. | Urea |
| Answer» E. | |
| 193. |
Chemically phosgene gas is |
| A. | Carbonyl sulphide |
| B. | Carbonyl chloride |
| C. | Phosphine |
| D. | Nickel carbonyl |
| Answer» C. Phosphine | |
| 194. |
The important ore of lead is |
| A. | Cassiterite |
| B. | Siderite |
| C. | Haematite |
| D. | Galena |
| Answer» E. | |
| 195. |
Sulphuric acid has great affinity for water because |
| A. | It hydrolyses the acid |
| B. | It decomposes the acid |
| C. | Acid forms hydrates with water |
| D. | None of these |
| Answer» D. None of these | |
| 196. |
The catalyst used in manufacture of NO by ostwald process is |
| A. | Pt |
| B. | Mo |
| C. | Fe |
| D. | Ag |
| Answer» B. Mo | |
| 197. |
Sapphire is a mineral of |
| A. | Cu |
| B. | Ca |
| C. | Fe |
| D. | Al |
| Answer» E. | |
| 198. |
Atomicity of phosphorus is |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» D. 5 | |
| 199. |
Photoconductors of xerox machine |
| A. | Black phosphorus |
| B. | Tellurium |
| C. | Mercury |
| D. | Selenium |
| Answer» E. | |
| 200. |
The C |
| A. | 1.66 |
| B. | 1.55 |
| C. | 1.44 |
| D. | 1.33 |
| Answer» B. 1.55 | |