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.
| 201. |
Noble gases are |
| A. | Monoatomic |
| B. | Diatomic |
| C. | Triatomic |
| D. | Any of the above |
| Answer» B. Diatomic | |
| 202. |
Graphite is used in atomic piles |
| A. | As a lubricant |
| B. | As a fuel |
| C. | As an insulator |
| D. | As a moderator |
| Answer» E. | |
| 203. |
The metal which weeps without tears is |
| A. | C |
| B. | Fe |
| C. | Sn |
| D. | Al |
| Answer» D. Al | |
| 204. |
Freon is used as |
| A. | Oxidant |
| B. | Refrigerant |
| C. | Catalyst |
| D. | Both (b) and (c) |
| Answer» C. Catalyst | |
| 205. |
The order of electron affinity of halogen is |
| A. | CI>F>Br>I |
| B. | I>Br>CI>F |
| C. | CI>Br>F>I |
| D. | F>CI>Br>I |
| Answer» B. I>Br>CI>F | |
| 206. |
Chlorine is mixed in water so that |
| A. | bacteria is killed |
| B. | dirt is removed |
| C. | water is cleaned |
| D. | suspension is removed |
| Answer» B. dirt is removed | |
| 207. |
Which of the element of group 17 is radioactive ? |
| A. | Iodine |
| B. | Astatine |
| C. | Bromine |
| D. | Chlorine |
| Answer» C. Bromine | |
| 208. |
Which one of the following forms of carbon is used in sugar industry |
| A. | Lamp black |
| B. | Wood charcoal |
| C. | Animal charcoal |
| D. | Graphite |
| Answer» D. Graphite | |
| 209. |
Which of the following metals exhibits similarity in properties of aluminium ? |
| A. | Ba |
| B. | Be |
| C. | Ca |
| D. | Sr |
| Answer» C. Ca | |
| 210. |
Which of the following is metallic in nature ? |
| A. | F |
| B. | CI |
| C. | Br |
| D. | I |
| Answer» E. | |
| 211. |
Silicon exhibit diagonal relationship with |
| A. | Be |
| B. | B |
| C. | C |
| D. | N |
| Answer» C. C | |
| 212. |
Clathrates are |
| A. | complex compounds |
| B. | non-stoichiometric compounds |
| C. | normal salts |
| D. | interstitial compounds |
| Answer» C. normal salts | |
| 213. |
Iodine deficiency in diet is known to cause |
| A. | Beri-beri |
| B. | Goitre |
| C. | Rickets |
| D. | Night-blindnets |
| Answer» C. Rickets | |
| 214. |
Which one of the following has maximum calorific value |
| A. | Water gas |
| B. | Producer gas |
| C. | Oil gas |
| D. | Coal gas |
| Answer» D. Coal gas | |
| 215. |
The element that marks the paper like lead is |
| A. | Tl |
| B. | Ga |
| C. | Ti |
| D. | B |
| Answer» B. Ga | |
| 216. |
Hydrogen peroxide does not act as |
| A. | An acid |
| B. | Base |
| C. | Oxidising agend |
| D. | Reducing agent |
| Answer» C. Oxidising agend | |
| 217. |
The percentage by weidht of hydrogen in H |
| A. | 6.50 |
| B. | 5.68 |
| C. | 25 |
| D. | 50 |
| Answer» C. 25 | |
| 218. |
Which is not a fertilizer ? |
| A. | Urea |
| B. | Super phosphate |
| C. | Sodium sulphate |
| D. | Potassium nitrate |
| Answer» D. Potassium nitrate | |
| 219. |
Boron behaves as a |
| A. | metal |
| B. | non-metal |
| C. | metalloid |
| D. | transition metal |
| Answer» C. metalloid | |
| 220. |
Ammonia is a |
| A. | polar solvent |
| B. | diamagneitc |
| C. | monopolar |
| D. | paramagnetic |
| Answer» B. diamagneitc | |
| 221. |
Which of the following is formed when white phosphorus is heated at 540 K in the absence of air ? |
| A. | -phosphorus |
| B. | Black phosphorus |
| C. | Red phosphorus |
| D. | Elementary phosphorus |
| Answer» D. Elementary phosphorus | |
| 222. |
The basicity of ortho phosphoric acid is |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» C. 4 | |
| 223. |
Anhydrous aluminium chloride is used as catalyst in |
| A. | Aldol condensation reaction |
| B. | Frie's rearrangement |
| C. | Hofmann's method |
| D. | Friedal craft reaction |
| Answer» E. | |
| 224. |
Which one among the following does not have an |
| A. | Oxygen |
| B. | Sulphur |
| C. | Nitrogen |
| D. | Carbon |
| Answer» D. Carbon | |
| 225. |
Chief constituent of water glas is |
| A. | calcium silicate |
| B. | sodium silicate |
| C. | magnesium silicate |
| D. | acid |
| Answer» C. magnesium silicate | |
| 226. |
Phosgene is obtained by the reaction of carbon monoxide and |
| A. | cholrine |
| B. | sulphur |
| C. | phosphorous |
| D. | None of these |
| Answer» B. sulphur | |
| 227. |
Carbon reacts with metal to form |
| A. | carbide |
| B. | carbonate |
| C. | hydroxide |
| D. | Oxide |
| Answer» B. carbonate | |
| 228. |
The structure of ozoneis |
| A. | Pyramidal |
| B. | Tetrahedral |
| C. | Octahedral |
| D. | Angular |
| Answer» E. | |
| 229. |
Which of the following could act as propellant for rockets ? |
| A. | Liquid hydrogen + Liquid nitrogen |
| B. | Liquid nitrogen + Liquid oxygen |
| C. | Liquid hydrogen + Liquid oxygen |
| D. | Liquid oxygen + Liquid argon |
| Answer» D. Liquid oxygen + Liquid argon | |
| 230. |
The ultraviolet rays can be checked by |
| A. | Flint glass |
| B. | Crooke's glass |
| C. | Soda glass |
| D. | Pyrex glass |
| Answer» C. Soda glass | |
| 231. |
In the manufacture of safty matcheds, we use |
| A. | White phosphorus |
| B. | Black Phosphorus |
| C. | Violet phosphorus |
| D. | Red phosphorus |
| Answer» E. | |
| 232. |
In the reaction N |
| A. | Pt and Cu |
| B. | Fe and Mo |
| C. | NO an Pt |
| D. | Ni and Ti |
| Answer» C. NO an Pt | |
| 233. |
Ozone turns starch iodine paper |
| A. | Green |
| B. | Blue |
| C. | Red |
| D. | Black |
| Answer» C. Red | |
| 234. |
Which of the following gases changes lime water in milky colour ? |
| A. | Carbon monoxide |
| B. | Nitrogen dioxide |
| C. | Hydrogen sulphide |
| D. | Carbon dioxide |
| Answer» E. | |
| 235. |
Name the flame having maximum temperature |
| A. | Oxy-hydrogen |
| B. | Bunsen-burner |
| C. | Oxy-acetylene |
| D. | Blow pipe burner |
| Answer» D. Blow pipe burner | |
| 236. |
Which one of the following removes temporary hardness of water ? |
| A. | Slaked lime |
| B. | Hydrolith |
| C. | Plaster of paris |
| D. | Cuprous |
| Answer» B. Hydrolith | |
| 237. |
Which of the following glasses is used in making wind screen of automobiles |
| A. | Pyrex |
| B. | Jena |
| C. | Crook's |
| D. | Safety |
| Answer» E. | |
| 238. |
Quartz is a crustalline variety of |
| A. | Silicon |
| B. | Silicon carbide |
| C. | Sodium silicate |
| D. | Silica |
| Answer» E. | |
| 239. |
Ultra silicon is prepared by the process of |
| A. | Crystallization |
| B. | Sublimation |
| C. | Zone refining |
| D. | Fractional distillation |
| Answer» D. Fractional distillation | |
| 240. |
Thee elements of group VA are generally known as |
| A. | Normal elements |
| B. | Transition elements |
| C. | Halogens |
| D. | Pnicogens |
| Answer» E. | |
| 241. |
One of the following elements does not exist as tatraatomic molecule |
| A. | N |
| B. | P |
| C. | As |
| D. | Sb |
| Answer» B. P | |
| 242. |
The oxidation state of phosphorus varies from |
| A. | -1 to +3 |
| B. | -3 to +3 |
| C. | -3 to +5 |
| D. | -5 to +1 |
| Answer» D. -5 to +1 | |
| 243. |
Which of the most metallic ? |
| A. | P |
| B. | As |
| C. | Sb |
| D. | Bi |
| Answer» E. | |
| 244. |
HF is not preserved in glass bottle because ? |
| A. | It reacts with the visible part of light |
| B. | It reacts with sodium oxide of glass |
| C. | It reacts with aluminium oxide of glass |
| D. | It reacts with silica of glass |
| Answer» E. | |
| 245. |
The conversion of atmospheric nitrogen into compounds is called |
| A. | Nitrogen conversion |
| B. | Nitrogen absorption |
| C. | Nitrogen fixation |
| D. | Nitrogenation |
| Answer» D. Nitrogenation | |
| 246. |
In the manufacture of nitric acid by Ostwald's process, which of the following is used |
| A. | Pt-Rh |
| B. | Bk |
| C. | Pt |
| D. | Rh |
| Answer» B. Bk | |
| 247. |
Which of the following has the highest boiling point ? |
| A. | Ne |
| B. | He |
| C. | Kr |
| D. | Ar |
| Answer» D. Ar | |
| 248. |
Consider the following statements. Hard water is not suitable for |
| A. | 1 and 3 |
| B. | 2 and 3 |
| C. | 1, 2 and 4 |
| D. | 1, 2, 3 and 4 |
| Answer» C. 1, 2 and 4 | |
| 249. |
Emery consists of impure |
| A. | Iron |
| B. | Corundum |
| C. | Carborundum |
| D. | Graphite |
| Answer» C. Carborundum | |
| 250. |
Which one of the following is a typical non-metal ? |
| A. | Si |
| B. | Pb |
| C. | Ge |
| D. | Sn |
| Answer» B. Pb | |