MCQOPTIONS
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MCQOPTIONS
This section includes 217 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. |
*/*_The maximum number of isomers for an alkene with molecular formula C4H8 is? |
| A. | 5 |
| B. | 4 |
| C. | 2 |
| D. | 3 |
| Answer» C. 2 | |
| 152. |
*/*_The hottest part of the gas flame is known as? |
| A. | luminous zone |
| B. | dark zone |
| C. | blue zone |
| D. | non-luminous zone |
| Answer» E. | |
| 153. |
*/*_The high reactivity of fluorine is due to? |
| A. | its high electro negativity |
| B. | small size of fluorine atom |
| C. | availability of d-orbitals |
| D. | strong F - F bond |
| Answer» B. small size of fluorine atom | |
| 154. |
*/*_The mineral containing both magnesium and calcium is? |
| A. | magnesite |
| B. | calcite |
| C. | carnallite |
| D. | dolomite |
| Answer» E. | |
| 155. |
*/*_The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is? |
| A. | Dalton's law |
| B. | Gay Lussac's law |
| C. | Henry's law |
| D. | Raoult's law |
| Answer» D. Raoult's law | |
| 156. |
*/*_The material which can be deformed permanently by heat and pressure is called a? |
| A. | thermoplastic |
| B. | thermoset |
| C. | chemical compound |
| D. | polymer |
| Answer» C. chemical compound | |
| 157. |
*/*_The graphite rods in the nuclear reactor? |
| A. | react with U to release energy |
| B. | produce neutrons |
| C. | undergo combustion which triggers the nuclear fission |
| D. | convert fast moving neutrons into thermal neutrons |
| Answer» E. | |
| 158. |
*/*_What are the number of moles of CO2 which contains 16 g of oxygen?? |
| A. | 0.5 mole |
| B. | 0.2 mole |
| C. | 0.4 mole |
| D. | 0.25 mole |
| Answer» B. 0.2 mole | |
| 159. |
*/*_The most malleable metal is? |
| A. | platinum |
| B. | silver |
| C. | iron |
| D. | gold |
| Answer» E. | |
| 160. |
*/*_The formula C6H5-CO-CH3 represents? |
| A. | Acetone |
| B. | Acetic acid |
| C. | Acetophenone |
| D. | Phenyl acetate |
| Answer» D. Phenyl acetate | |
| 161. |
_ The molecular formula of phosphorous is$? |
| A. | P1 |
| B. | P2 |
| C. | P3 |
| D. | P4 |
| Answer» E. | |
| 162. |
_ The method that cannot be used for removing permanent hardness of water is$? |
| A. | adding sodium carbonate |
| B. | distillation |
| C. | adding caustic soda |
| D. | boiling |
| Answer» E. | |
| 163. |
_ The nucleus of a hydrogen atom consists of$? |
| A. | 1 proton only |
| B. | 1 proton + 2 neutron |
| C. | 1 neutron only |
| D. | 1 electron only |
| Answer» B. 1 proton + 2 neutron | |
| 164. |
_ The metal that is used as a catalyst in the hydrogenation of oils is$? |
| A. | Ni |
| B. | Pb |
| C. | Cu |
| D. | Pt |
| Answer» B. Pb | |
| 165. |
_ The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3$? |
| A. | 4 |
| B. | 5 |
| C. | 2 |
| D. | zero |
| Answer» B. 5 | |
| 166. |
_ The main active constituent of tea and coffee is$? |
| A. | nicotine |
| B. | chlorophyll |
| C. | caffeine |
| D. | aspirin |
| Answer» D. aspirin | |
| 167. |
_ The number of electrons presents in H+ is$? |
| A. | zero |
| B. | one |
| C. | two |
| D. | three |
| Answer» B. one | |
| 168. |
_ The molecule which has the highest percentage of ionic character among the following is$? |
| A. | HI |
| B. | HF |
| C. | HCI |
| D. | HBr |
| Answer» C. HCI | |
| 169. |
_ The main chemical constituent of clay is$? |
| A. | silicon oxide |
| B. | aluminium borosilicate |
| C. | zeolites |
| D. | aluminium silicate |
| Answer» E. | |
| 170. |
_ The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock's called$? |
| A. | granite |
| B. | basalt |
| C. | igneous rocks |
| D. | sedimentary rocks |
| Answer» D. sedimentary rocks | |
| 171. |
_ The items amenable to detection by soft x-rays are$? |
| A. | contrabands |
| B. | lead in bullets |
| C. | narcotics |
| D. | genuine coins from counterfeit coins |
| Answer» E. | |
| 172. |
_ The ionic radii of N3-, O2-, F- and Na+ follows the order$? |
| A. | N3- > O2- > F- > Na+ |
| B. | N3- > Na+ > O2- > F- |
| C. | Na+ > O2- > N3- > F- |
| D. | O2- > F- > Na+ > N3- |
| Answer» B. N3- > Na+ > O2- > F- | |
| 173. |
_ The heat energy produced when the human body metabolises 1 gram of fat is$? |
| A. | 30 KJ |
| B. | 1 KJ |
| C. | 39 KJ |
| D. | 29 KJ |
| Answer» D. 29 KJ | |
| 174. |
_ The number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature is$? |
| A. | 1.568 x 103 |
| B. | 6.023 x 1019 |
| C. | 4.84 x 1017 |
| D. | 6.023 x 1023 |
| Answer» C. 4.84 x 1017 | |
| 175. |
_ The maximum number of covalent formed by nitrogen is$? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 176. |
_The inert gases are ____ in water$? |
| A. | sparingly soluble |
| B. | insoluble |
| C. | soluble |
| D. | None of these |
| Answer» B. insoluble | |
| 177. |
_The most electropositive elements among the following is$? |
| A. | Na |
| B. | Ca |
| C. | K |
| D. | Cs |
| Answer» E. | |
| 178. |
_The most commonly used bleaching agent is$? |
| A. | alcohol |
| B. | carbon dioxide |
| C. | chlorine |
| D. | sodium chlorine |
| Answer» D. sodium chlorine | |
| 179. |
_The octane number of zero is assigned to$? |
| A. | 2-methyl octane |
| B. | n-heptane |
| C. | iso-octane |
| D. | 3-methyl octane |
| Answer» C. iso-octane | |
| 180. |
_The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind?$? |
| A. | 1/6 |
| B. | 1/3 |
| C. | 1/8 |
| D. | 1/4 |
| Answer» D. 1/4 | |
| 181. |
_The most extensive, commercially useful source of thorium as monazite sand occurs in India at$? |
| A. | Orissa coast |
| B. | Travancore coast |
| C. | West Bengal coast |
| D. | Gujarat coast |
| Answer» C. West Bengal coast | |
| 182. |
_The organic reaction represented by equation CH3 - CH = O + H2NOH gives CH3 - CH - NH + H2O is an example of$? |
| A. | an addition reaction |
| B. | a condensation reaction |
| C. | an oxidation reaction |
| D. | an elimination reaction |
| Answer» C. an oxidation reaction | |
| 183. |
_The main chemical constituent of the oil of cardamom which is responsible for flavour of this oil is$? |
| A. | cineole |
| B. | engenol |
| C. | geraniol |
| D. | limonene |
| Answer» B. engenol | |
| 184. |
_The major constituent of air is$? |
| A. | carbon dioxide |
| B. | nitrogen |
| C. | oxygen |
| D. | hydrogen |
| Answer» C. oxygen | |
| 185. |
_The molecules of which gas have highest speed?$? |
| A. | H2 at -73oC |
| B. | CH4 at 300 K |
| C. | N2 at 1,027oC |
| D. | O2 at 0oC |
| Answer» B. CH4 at 300 K | |
| 186. |
_The mass of one Avogadro number of helium atom is$? |
| A. | 1.00 gram |
| B. | 4.00 gram |
| C. | 8.00 gram |
| D. | 4 x 6.02 x 1023 gram |
| Answer» E. | |
| 187. |
_The gas used in the manufacture of vanaspati from vegetable oil is$? |
| A. | hydrogen |
| B. | oxygen |
| C. | nitrogen |
| D. | carbon dioxide |
| Answer» B. oxygen | |
| 188. |
_The inherited traits of an organism are controlled by$? |
| A. | RNA molecules |
| B. | nucleotides |
| C. | DNA molecules |
| D. | enzymes |
| Answer» D. enzymes | |
| 189. |
_The luster of a metal is due to$? |
| A. | its high density |
| B. | its high polishing |
| C. | its chemical inertness |
| D. | presence of free electrons |
| Answer» E. | |
| 190. |
_The mass number of an atom is equal to$? |
| A. | the number of protons |
| B. | the number of protons and electrons |
| C. | the number of nucleons |
| D. | the number of neutrons |
| Answer» D. the number of neutrons | |
| 191. |
The method of concentrating the ore which makes use of the difference in density between ore and impurities is called$? |
| A. | liquation |
| B. | leaching |
| C. | levigation |
| D. | magnetic separation |
| Answer» D. magnetic separation | |
| 192. |
The method of concentrating the ore which makes use of the difference in density between ore and impurities is called? |
| A. | liquation |
| B. | leaching |
| C. | levigation |
| D. | magnetic separation |
| Answer» D. magnetic separation | |
| 193. |
The hydronium ion is? |
| A. | H+ |
| B. | HO - |
| C. | H2+ |
| D. | H3O+ |
| Answer» E. | |
| 194. |
The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is? |
| A. | helium |
| B. | ozone |
| C. | oxygen |
| D. | methane |
| Answer» C. oxygen | |
| 195. |
The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is? |
| A. | 2.05 gram |
| B. | 3.05 gram |
| C. | 4.05 gram |
| D. | 5.05 gram |
| Answer» C. 4.05 gram | |
| 196. |
The isomerism which exists between CH3CHCI2 and CH2CI. CH2CI is? |
| A. | chain isomerism |
| B. | functional group isomerism |
| C. | positional isomerism |
| D. | metamerism |
| Answer» D. metamerism | |
| 197. |
The number of g-molecule of oxygen in 6.02 x 1024CO molecules is? |
| A. | 1 gram of molecule |
| B. | 0.5 gram of molecule |
| C. | 5 gram of molecule |
| D. | 10 gram of molecule |
| Answer» D. 10 gram of molecule | |
| 198. |
The most important ore of aluminium is? |
| A. | bauxite |
| B. | magnetite |
| C. | haematite |
| D. | monazite |
| Answer» B. magnetite | |
| 199. |
Zone refining is used for the purification of? |
| A. | Au |
| B. | Ge |
| C. | Ag |
| D. | Cu |
| Answer» C. Ag | |
| 200. |
The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is? |
| A. | 5x/36 |
| B. | 5x |
| C. | 7.2 x |
| D. | x/6 |
| Answer» B. 5x | |