MCQOPTIONS
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MCQOPTIONS
This section includes 856 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
Ozone saves the biosphere by absorbing high energy radiations called ________ . |
| A. | nfra-red (IR) |
| B. | amma rays |
| C. | ltraviolet rays (UV) |
| D. | –rays |
| Answer» D. –rays | |
| 202. |
Formation of ozone hole is maximum over |
| A. | frica |
| B. | ndia |
| C. | ntarctica |
| D. | urope |
| Answer» D. urope | |
| 203. |
Which is not a green house gas ? |
| A. | O2 |
| B. | H4 |
| C. | 2O |
| D. | hlorofluorocarbons |
| Answer» D. hlorofluorocarbons | |
| 204. |
Which of the process is known as nitrification? |
| A. | eaction of Nitrogen Monoxide with oxygen to form nitric acid |
| B. | eaction of nitrogen dioxide with water to form nitric acid |
| C. | onversion of ammonia to nitrites |
| D. | onversion of nitrite to nitric oxide |
| Answer» D. onversion of nitrite to nitric oxide | |
| 205. |
What is the maximum Water Vapour content in the atmosphere? |
| A. | to 3 per cent |
| B. | to 4 per cent |
| C. | to 5 per cent |
| D. | to 6 per cent |
| Answer» C. to 5 per cent | |
| 206. |
The highest volume of gases in lower atmosphere is comprised of |
| A. | ydrogen |
| B. | arbon dioxide |
| C. | xygen |
| D. | itrogen |
| Answer» E. | |
| 207. |
The chief constituent of natural gas is: |
| A. | ethane |
| B. | elium |
| C. | itrogen |
| D. | ropane |
| Answer» B. elium | |
| 208. |
The natural resource, known as black gold is |
| A. | oal |
| B. | ead |
| C. | in |
| D. | latinum |
| Answer» B. ead | |
| 209. |
Which of the following is biodegradable ? |
| A. | aper |
| B. | .D.T. |
| C. | luminium |
| D. | lastic |
| Answer» B. .D.T. | |
| 210. |
The main constituent of natural gas is |
| A. | ethane |
| B. | thane |
| C. | utane |
| D. | ropane |
| Answer» B. thane | |
| 211. |
For generation of biogas, the materials commonly used are |
| A. | nimal wastes |
| B. | rop residues |
| C. | quatic plants |
| D. | orest residues |
| Answer» B. rop residues | |
| 212. |
Philosopher’s wool is chemically |
| A. | luminium oxide |
| B. | agnesium oxide |
| C. | inc oxide |
| D. | alcium oxide |
| Answer» D. alcium oxide | |
| 213. |
The common name for the compound having formal NaOH is |
| A. | austic soda |
| B. | austic potash |
| C. | oda ash |
| D. | odium hydroxide |
| Answer» B. austic potash | |
| 214. |
The chemical formula of the laughing gas is |
| A. | O |
| B. | 2O |
| C. | O2 |
| D. | 2O3 |
| Answer» C. O2 | |
| 215. |
Chemical name of bleaching powder is : |
| A. | alcium chlorate |
| B. | alcium hypochlorite |
| C. | alcium chloro hypochlorite |
| D. | alcium bi chloride |
| Answer» C. alcium chloro hypochlorite | |
| 216. |
Which one of the following is a micro-element ? |
| A. | hlorine |
| B. | ydrogen |
| C. | itrogen |
| D. | xygen |
| Answer» B. ydrogen | |
| 217. |
What is 'milk of magnesia' chemically? |
| A. | agnesium carbonate |
| B. | odium bicarbonate |
| C. | alcium hydroxide |
| D. | agnesium hydroxide |
| Answer» E. | |
| 218. |
Nitrogen forms a variety of compounds in all oxidation states ranging from |
| A. | 3 to +5 |
| B. | 3 to +3 |
| C. | 3 to +4 |
| D. | 3 to +6 |
| Answer» B. 3 to +3 | |
| 219. |
Chemical name of common salt is |
| A. | odium Chloride |
| B. | odium Bicarbonate |
| C. | odium |
| D. | odium Oxide |
| Answer» B. odium Bicarbonate | |
| 220. |
The chemical name of baking soda is |
| A. | odium carbonate |
| B. | odium bicarbonate |
| C. | odium chloride |
| D. | odium nitrate |
| Answer» C. odium chloride | |
| 221. |
Brine refers to : |
| A. | alt water |
| B. | weet water |
| C. | ure water |
| D. | tarch water |
| Answer» B. weet water | |
| 222. |
Sodium Carbonate is commonly known as |
| A. | aking Soda |
| B. | ashing Soda |
| C. | austic Soda |
| D. | austic Potash |
| Answer» C. austic Soda | |
| 223. |
Baking soda is : |
| A. | otassium carbonate |
| B. | odium hydroxide |
| C. | odium carbonate |
| D. | odium bicarbonate |
| Answer» E. | |
| 224. |
Rock salt is a mineral containing |
| A. | otassium |
| B. | agnesium |
| C. | odium |
| D. | ron |
| Answer» D. ron | |
| 225. |
The chemical name of ‘Common salt’ is |
| A. | odium chloride |
| B. | odium nitrate |
| C. | mmonium chloride |
| D. | alcium chloride |
| Answer» B. odium nitrate | |
| 226. |
What is the chemical name for ‘Baking Soda’ ? |
| A. | odium carbonate |
| B. | odium bicarbonate |
| C. | odium nitrite |
| D. | odium nitrate |
| Answer» C. odium nitrite | |
| 227. |
Which of the following is not a chemical reaction? |
| A. | urning of paper |
| B. | igestion of food |
| C. | onversion of water into steam |
| D. | urning of coal |
| Answer» D. urning of coal | |
| 228. |
The components of water can be separated by |
| A. | hysical methods |
| B. | hemical methods |
| C. | oth A and B |
| D. | hey can not be separated |
| Answer» C. oth A and B | |
| 229. |
Which one of the following is most electronegative? |
| A. | arbon |
| B. | ilicon |
| C. | ead |
| D. | in |
| Answer» B. ilicon | |
| 230. |
What is the element required for solar energy conversion ? |
| A. | eryllium |
| B. | antalum |
| C. | ilicon |
| D. | ltra pure carbon |
| Answer» D. ltra pure carbon | |
| 231. |
The most abundant element by number in the living system is : |
| A. | itrogen |
| B. | ydrogen |
| C. | xygen |
| D. | arbon |
| Answer» C. xygen | |
| 232. |
In addition to hydrogen, the other abundant element present on Sun’s surface is |
| A. | elium |
| B. | eon |
| C. | rgon |
| D. | xygen |
| Answer» B. eon | |
| 233. |
Water can be separated from alcohol water mixture by |
| A. | ecantation |
| B. | vaporation |
| C. | istillation |
| D. | ublimation |
| Answer» D. ublimation | |
| 234. |
The material used in the manufacture of lead pencil is |
| A. | raphite |
| B. | ead |
| C. | arbon |
| D. | ica |
| Answer» B. ead | |
| 235. |
Select the one which is not a mixture : |
| A. | ir |
| B. | asoline |
| C. | PG |
| D. | istilled water |
| Answer» E. | |
| 236. |
The most abundant element in the earth’s atmosphere is |
| A. | rgon |
| B. | itrogen |
| C. | xygen |
| D. | rypton |
| Answer» C. xygen | |
| 237. |
The most abundant element in the human body is |
| A. | arbon |
| B. | ron |
| C. | itrogen |
| D. | xygen |
| Answer» E. | |
| 238. |
The gas used to dilute oxygen for breathing by deep sea divers is: |
| A. | eon |
| B. | rgon |
| C. | itrogen |
| D. | elium |
| Answer» E. | |
| 239. |
An example of replenishable energy source is– |
| A. | oal |
| B. | etroleum |
| C. | ignite |
| D. | iomass |
| Answer» E. | |
| 240. |
Gobar gas mainly contains |
| A. | arbon dioxide |
| B. | arbon monoxide |
| C. | ydrogen sulphide |
| D. | ethane |
| Answer» E. | |
| 241. |
Gobar gas contains mainly : |
| A. | ethane |
| B. | thylene |
| C. | ropylene |
| D. | cetylene |
| Answer» B. thylene | |
| 242. |
Which of the following is a renewable source of energy ? |
| A. | oal |
| B. | eothermal power |
| C. | atural gas |
| D. | ranium |
| Answer» C. atural gas | |
| 243. |
The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing is: |
| A. | eon |
| B. | rgon |
| C. | rypton |
| D. | elium |
| Answer» E. | |
| 244. |
Which among the following elements is found in maximum percentage in the human body ? |
| A. | arbon |
| B. | ydrogen |
| C. | itrozen |
| D. | xygen |
| Answer» E. | |
| 245. |
Which one element from below list is liquid at room temperature? |
| A. | inc |
| B. | rgon |
| C. | ead |
| D. | romine |
| Answer» E. | |
| 246. |
Which among the following is used to dilute oxygen in the gas cylinders used by divers ? |
| A. | rypton |
| B. | rgon |
| C. | elium |
| D. | eon |
| Answer» D. eon | |
| 247. |
What is the element that is in the highest percentage in the composition of the earth ? |
| A. | ilicon |
| B. | xygen |
| C. | agnesium |
| D. | ron |
| Answer» C. agnesium | |
| 248. |
When quick lime is added to water |
| A. | eat is liberated |
| B. | eat is absorbed |
| C. | emperature decreases |
| D. | o heat change takes place |
| Answer» B. eat is absorbed | |
| 249. |
Catalyst is a substance which |
| A. | ncreases the rate of the reaction |
| B. | ecreases the rate of reaction |
| C. | as no action on the rate of the reaction |
| D. | one of these |
| Answer» E. | |
| 250. |
Copper substances when exposed to air gains a green coating due to the formation of: |
| A. | uO |
| B. | uCO3 Cu(OH)2 |
| C. | uSO4 |
| D. | u(NO3)2 |
| Answer» C. uSO4 | |