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.
| 151. |
Maximum permissible concentration of copper in drinking water in mg/L is |
| A. | 0.01 |
| B. | 0.05 |
| C. | 0 |
| D. | 0 |
| Answer» D. 0 | |
| 152. |
Hardness of the water is commonly measured in terms of |
| A. | alcium carbonate equivalents |
| B. | alcium sulphate equivalents |
| C. | agnesium carbonate equivalents |
| D. | agnesium sulphate equivalents |
| Answer» B. alcium sulphate equivalents | |
| 153. |
The metallic constituents of hard water are : |
| A. | agnesium, calcium and tin |
| B. | ron, tin and calcium |
| C. | alcium, magnesium and iron |
| D. | agnesium, tin and iron |
| Answer» D. agnesium, tin and iron | |
| 154. |
In sugar solution, |
| A. | ugar is solute, water is solvent |
| B. | ugar is solvent, water is solute |
| C. | oth are solutes |
| D. | oth are solvents |
| Answer» B. ugar is solvent, water is solute | |
| 155. |
The unit to measure the flow of water is |
| A. | icro Mho |
| B. | hm meter |
| C. | illi curie |
| D. | usecs |
| Answer» E. | |
| 156. |
Table salt gets moist during rainy season because |
| A. | odium chloride is hygroscopic |
| B. | odium chloride is deliquescent |
| C. | odium chloride contains some quantity of sodium iodide |
| D. | odium chloride contains hygroscopic impurities like magnesium chloride |
| Answer» E. | |
| 157. |
Iron and manganese present as pollutants in water cannot be removed by________ |
| A. | xidation followed by settling and filtration |
| B. | hlorination |
| C. | on exchange process |
| D. | ime soda process or manganese zeolite process |
| Answer» C. on exchange process | |
| 158. |
The acid which fails to liberate carbon dioxide from sodium bicarbonate is : |
| A. | cetic acid |
| B. | ormic acid |
| C. | arbonic acid |
| D. | ulphuric acid |
| Answer» E. | |
| 159. |
Which one of the following is used as preservative for foodstuff ? |
| A. | odium Benzoate |
| B. | icric acid |
| C. | lycerine |
| D. | odium Chloride |
| Answer» B. icric acid | |
| 160. |
pH scale ranges from |
| A. | – 7 |
| B. | – 14 |
| C. | – 14 |
| D. | one |
| Answer» D. one | |
| 161. |
Sour taste of lemon is due to the presence of which of the following ? |
| A. | itric acid |
| B. | cetic acid |
| C. | xalic acid |
| D. | ormic acid |
| Answer» B. cetic acid | |
| 162. |
Sour milk contains |
| A. | cetic acid |
| B. | artaric acid |
| C. | itric acid |
| D. | actic acid |
| Answer» E. | |
| 163. |
Saline soil contains |
| A. | igh concentration of salt |
| B. | ot of moisture |
| C. | ard rocks |
| D. | one of the above |
| Answer» B. ot of moisture | |
| 164. |
Match the sourc in Column B with the product of Column A. (Product) Column B (Source)A. Formic acid1. LemonB. Citric acid 2. TamarindC. Tartaric acid3. Ants |
| A. | B C3 2 1 |
| B. | B C 3 1 2 |
| C. | B C 2 3 1 |
| D. | B C 2 1 3 |
| Answer» C. B C 2 3 1 | |
| 165. |
Which of these acids is not organic in origin? |
| A. | actic acid |
| B. | ulphuric acid |
| C. | itric acid |
| D. | xalic acid |
| Answer» C. itric acid | |
| 166. |
The pH of human blood is between |
| A. | .5-7 |
| B. | .5-8 |
| C. | -9 |
| D. | .5-5 |
| Answer» C. -9 | |
| 167. |
Antacids are found in drugs that give relief to |
| A. | ye sight |
| B. | tomach ache |
| C. | cne |
| D. | eadache |
| Answer» C. cne | |
| 168. |
The pH of lemon juice is expected to be |
| A. | qual to 7 |
| B. | ore than 7 |
| C. | ess than 7 |
| D. | othing can be predicted |
| Answer» D. othing can be predicted | |
| 169. |
Ammonial is a mixture of |
| A. | luminium powder and ammonium nitrate |
| B. | luminium powder and ammonium chloride |
| C. | luminium powder and ammonium sulphate |
| D. | luminium powder and potassium nitrate |
| Answer» B. luminium powder and ammonium chloride | |
| 170. |
pH value between 6.5-7.5 makes the soil |
| A. | asic |
| B. | eutral |
| C. | cidic |
| D. | one of these |
| Answer» E. | |
| 171. |
Vinegar is ________ . |
| A. | iluted acetic acid |
| B. | lacial acetic acid |
| C. | lacial formic acid |
| D. | iluted formic acid |
| Answer» E. | |
| 172. |
Which one is a soluble salt in H2O? |
| A. | uS |
| B. | n(OH)2 |
| C. | aCl2 |
| D. | bCl2 |
| Answer» D. bCl2 | |
| 173. |
Milk tastes sour when kept in the open for sometime due to the formation of |
| A. | actic acid |
| B. | itric acid |
| C. | cetic acid |
| D. | arbonic acid |
| Answer» B. itric acid | |
| 174. |
Which one of the following is most acidic? |
| A. | l2O3 |
| B. | a2O |
| C. | gO |
| D. | aO |
| Answer» B. a2O | |
| 175. |
Formic acid is produced by |
| A. | hite ants |
| B. | ockroaches |
| C. | ed ants |
| D. | osquitoes |
| Answer» D. osquitoes | |
| 176. |
The alkaloid naturally found in coffee, cocoa and cola nut is |
| A. | ocaine |
| B. | orphine |
| C. | annin |
| D. | affeine |
| Answer» E. | |
| 177. |
The ‘Green House effect’ is produced due to the presence of excess amount of |
| A. | ulphur dioxide |
| B. | itrogen dioxide |
| C. | arbon monoxide |
| D. | ethane |
| Answer» E. | |
| 178. |
Acid rain is caused by the pollution of environment by |
| A. | arbon monoxide and Carbon dioxide |
| B. | zone and Carbon dioxide |
| C. | itrous oxide and Sulphur dioxide |
| D. | arbon dioxide and Nitrogen |
| Answer» D. arbon dioxide and Nitrogen | |
| 179. |
Which one of the following is a greenhouse gas ? |
| A. | itrogen |
| B. | elium |
| C. | arbon dioxide |
| D. | ulphur dioxide |
| Answer» D. ulphur dioxide | |
| 180. |
Oxygen which is vital for life is a product of photosynthesis and comes from |
| A. | arbonates from soil |
| B. | arbon dioxide |
| C. | ater |
| D. | xides of mineral elements |
| Answer» D. xides of mineral elements | |
| 181. |
The BOD values of water indicate the |
| A. | mount of organic debris |
| B. | mount of oxygen used for biochemical oxidation |
| C. | mount of oxygen used for biochemical reduction |
| D. | mount of ozone used for biochemical oxidation |
| Answer» C. mount of oxygen used for biochemical reduction | |
| 182. |
Aerated water contains |
| A. | O2 |
| B. | O2 |
| C. | 2 |
| D. | O2 |
| Answer» E. | |
| 183. |
Tar roads get damaged if there is |
| A. | tagnation of water on road |
| B. | eavy traffic |
| C. | o maintenance |
| D. | o sloping |
| Answer» B. eavy traffic | |
| 184. |
Ultraviolet rays can be used in water treatment as |
| A. | locculator |
| B. | recipitator |
| C. | ydrolyser |
| D. | isinfectant |
| Answer» E. | |
| 185. |
The water pollution in river is measured by the dissolved amount of |
| A. | hlorine |
| B. | zone |
| C. | itrogen |
| D. | xygen |
| Answer» E. | |
| 186. |
Biofertilizers convert nitrogen to ________ . |
| A. | itrates |
| B. | mmonia |
| C. | itrogenase |
| D. | mino acids |
| Answer» C. itrogenase | |
| 187. |
The source of energy that causes the least global warming is |
| A. | oal |
| B. | eothermal energy |
| C. | atural Gas |
| D. | etroleum |
| Answer» C. atural Gas | |
| 188. |
The increasing abundance of green house gases in atmosphere has led to the following effect except |
| A. | lobal warming |
| B. | epletion of ozone layer in the stratosphere |
| C. | xygen fertilization effect |
| D. | arbon dioxide ferilization effect |
| Answer» D. arbon dioxide ferilization effect | |
| 189. |
Smoke is formed due to |
| A. | olid dispersed in gas |
| B. | olid dispresed in liquid |
| C. | as dispresed in solid |
| D. | as dispersed in gas |
| Answer» B. olid dispresed in liquid | |
| 190. |
Green house effect is accelerated by |
| A. | eforestation |
| B. | apid industrialization |
| C. | ncreased transportation activity |
| D. | ll of these |
| Answer» E. | |
| 191. |
Which one of the following is not a ‘green house gas’ ? |
| A. | hlorofluorocarbons |
| B. | ethane |
| C. | arbon dioxide |
| D. | itrogen |
| Answer» E. | |
| 192. |
Which one of the following statement is correct ?Ozone is found in the earth's atmosphere mostly between |
| A. | and 10 km |
| B. | 0 and 20 km |
| C. | 0 and 50 km |
| D. | 0 and 100 km |
| Answer» D. 0 and 100 km | |
| 193. |
Which gas does not form the part of atmosphere ? |
| A. | itrogen |
| B. | elium |
| C. | hlorine |
| D. | one of the above |
| Answer» D. one of the above | |
| 194. |
The atmospheric gas that is mainly responsible for green house effect : |
| A. | zone |
| B. | itrogen |
| C. | xygen |
| D. | arbon dioxide |
| Answer» E. | |
| 195. |
The greenhouse effect is caused by the higher level of which gas in the atmosphere ? |
| A. | arbon monoxide |
| B. | arbon dioxide |
| C. | itrous oxide |
| D. | ulphur dioxide |
| Answer» C. itrous oxide | |
| 196. |
Earth’s atmosphere is an envelope of gases extending to a height of |
| A. | 00 km |
| B. | 50 km |
| C. | 00 km |
| D. | 00 km |
| Answer» D. 00 km | |
| 197. |
The lowest layer of earth's atmosphere is |
| A. | roposphere |
| B. | tratosphere |
| C. | esosphere |
| D. | onosphere |
| Answer» B. tratosphere | |
| 198. |
Greenhouse effect is caused by |
| A. | itrogen |
| B. | arbon dioxide |
| C. | arbon monoxide |
| D. | itrogen dioxide |
| Answer» C. arbon monoxide | |
| 199. |
Which of the following chemical materials is responsible for the depletion of ozone layer in the atmosphere ? |
| A. | itrous oxide |
| B. | arbon dioxide |
| C. | hlorofluorocarbon |
| D. | ulphur dioxide |
| Answer» D. ulphur dioxide | |
| 200. |
Which one of the following is not a cause for present global warming and climate change ? |
| A. | FC emission |
| B. | arbon dioxide emission |
| C. | eforestation |
| D. | ethane emission |
| Answer» D. ethane emission | |