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MCQOPTIONS
This section includes 2539 Mcqs, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 2201. |
The formula of ethene is |
| A. | C₂H₆ |
| B. | CH₃ |
| C. | C₄H₁₂ |
| D. | C₂H |
| Answer» B. CH₃ | |
| 2202. |
Enzymes do not |
| A. | produce side products |
| B. | get consumed up during the process |
| C. | do not change their chemical composition |
| D. | all of above |
| Answer» E. | |
| 2203. |
Alkenes (C=C) are known to be |
| A. | saturated hydrocarbons |
| B. | unsaturated hydrocarbons |
| C. | super saturated hydrocarbons |
| D. | super unsaturated hydrocarbons |
| Answer» C. super saturated hydrocarbons | |
| 2204. |
Alkenes can be oxidized by the help of a powerful oxidizing agent, acidified |
| A. | potassium magnate |
| B. | sodium magnate |
| C. | calcium magnate |
| D. | calcium carbonate |
| Answer» B. sodium magnate | |
| 2205. |
Upon heating, conversion of solids into liquids can be explained through |
| A. | physical energy |
| B. | radiant energy |
| C. | heat energy |
| D. | kinetic energy |
| Answer» E. | |
| 2206. |
There is a difference in the effect of optical isomer on |
| A. | heat |
| B. | temperature |
| C. | polarized light |
| D. | pressure |
| Answer» D. pressure | |
| 2207. |
Ethanoyl chloride will react with concentrated ammonia solution to produce |
| A. | methanamine |
| B. | ethanoic acid |
| C. | Methanoic acid |
| D. | ethanamide |
| Answer» E. | |
| 2208. |
Word kinetic refers to |
| A. | locomotion |
| B. | vibration |
| C. | motion |
| D. | resonance |
| Answer» D. resonance | |
| 2209. |
The colored compounds which are formed on the addition of phenol to diazonium ion are called |
| A. | azo dyes |
| B. | colored compounds |
| C. | aromatic compounds |
| D. | transition metals |
| Answer» B. colored compounds | |
| 2210. |
A constant temperature at which a pure solid changes into a pure liquid is called |
| A. | latent heat of vaporization |
| B. | an elevation in boiling point |
| C. | melting point |
| D. | boiling point |
| Answer» D. boiling point | |
| 2211. |
When phosphorus reacts with oxygen, it gives off clouds of |
| A. | white color |
| B. | phosphorus oxide only |
| C. | phosphorus dioxide |
| D. | white color and phosphorus oxide |
| Answer» E. | |
| 2212. |
Gmol⁻¹ is the standard unit for |
| A. | molecular mass |
| B. | molar mass |
| C. | Avogadro constant |
| D. | atomic mass |
| Answer» C. Avogadro constant | |
| 2213. |
Word kinetic comes from |
| A. | Greek |
| B. | Latin |
| C. | Spanish |
| D. | German |
| Answer» B. Latin | |
| 2214. |
Amides give products of sodium salt of carboxylic acid and primary amine in presence on aqueous sodium hydroxide by reacting with |
| A. | acids |
| B. | bases |
| C. | alkalis |
| D. | metals |
| Answer» D. metals | |
| 2215. |
One replaceable hydrogen atom per molecule is present in |
| A. | monobasic acids |
| B. | monoacid bases |
| C. | multibasic acids |
| D. | multiacid bases |
| Answer» B. monoacid bases | |
| 2216. |
An estimated amount of 10,000 ethene monomers bond together to make polymer chain of |
| A. | polyethene |
| B. | polyvinyl chloride |
| C. | polymers |
| D. | monomers |
| Answer» B. polyvinyl chloride | |
| 2217. |
The relative formula C₃H₆ is of molecule |
| A. | propene |
| B. | ethene |
| C. | propane |
| D. | ethane |
| Answer» B. ethene | |
| 2218. |
Gram atomic mass of usually occurring uranium is |
| A. | 239 |
| B. | 238 |
| C. | 235 |
| D. | 236 |
| Answer» C. 235 | |
| 2219. |
Metals usually form |
| A. | anions |
| B. | cations |
| C. | no ions |
| D. | neutral |
| Answer» C. no ions | |
| 2220. |
PH stands for the power of |
| A. | H⁺ ion concentration |
| B. | OH⁻ ion concentration |
| C. | He± ion concentration |
| D. | power of Hypnotizes |
| Answer» B. OH⁻ ion concentration | |
| 2221. |
The double bond in ethene is formed from a |
| A. | sigma-bond only |
| B. | pi-bond only |
| C. | lone pairs |
| D. | sigma and pi-bonds |
| Answer» E. | |
| 2222. |
Sublimation refers to |
| A. | conversion of solid directly into gas |
| B. | conversion of gas into liquid |
| C. | conversion of gas directly into solid |
| D. | conversion of liquid into solid |
| Answer» B. conversion of gas into liquid | |
| 2223. |
Sorensen used word 'Potenz' which means |
| A. | concentration |
| B. | power |
| C. | ion |
| D. | energy |
| Answer» C. ion | |
| 2224. |
One molecule of water contains oxygen atoms, which are |
| A. | 3 |
| B. | 2 |
| C. | 4 |
| D. | 1 |
| Answer» E. | |
| 2225. |
Amides are refluxed for hydrolysis by |
| A. | sodium chloride only |
| B. | sodium hydroxide only |
| C. | sodium chlorate |
| D. | sodium chloride and sodium hydroxide |
| Answer» E. | |
| 2226. |
Only one particular optical isomer of amino acids are used in our body to make |
| A. | carbohydrates |
| B. | lipids |
| C. | protein |
| D. | oxygen |
| Answer» D. oxygen | |
| 2227. |
ATP is synthesized in |
| A. | Cytoplasm |
| B. | Ribosome's |
| C. | Mitochondria |
| D. | Nucleus |
| Answer» D. Nucleus | |
| 2228. |
As compared to solids, liquids have |
| A. | less distance between particles |
| B. | greater distance between particles |
| C. | there is a strong attraction between particles |
| D. | are highly compressible |
| Answer» C. there is a strong attraction between particles | |
| 2229. |
Ketones react with the reducing agent to make |
| A. | primary alcohols |
| B. | secondary alcohol |
| C. | tertiary alcohol |
| D. | aldehydes |
| Answer» C. tertiary alcohol | |
| 2230. |
Upon diffusion, crystal of potassium magnate forms a |
| A. | purple solution |
| B. | violet solution |
| C. | red solution |
| D. | transparent solution |
| Answer» B. violet solution | |
| 2231. |
The reaction between phenylamine and nitrous acid produce diazonium ion while making azo dye is called |
| A. | denaturation |
| B. | desorption |
| C. | diazotization |
| D. | dissimilation |
| Answer» D. dissimilation | |
| 2232. |
Number of isotopes of tin is |
| A. | eleven |
| B. | five |
| C. | seven |
| D. | three |
| Answer» B. five | |
| 2233. |
When sodium (Na) is heated and added to chlorine gas (Cl₂) jar it forms |
| A. | sodium chloride |
| B. | sodium bicarbonate |
| C. | sodium sulfide |
| D. | water |
| Answer» B. sodium bicarbonate | |
| 2234. |
Aluminum oxide (Al₂O₆) reacts as a base (OH⁻) upon reaction with |
| A. | water |
| B. | acid |
| C. | base |
| D. | salt solution |
| Answer» C. base | |
| 2235. |
After the substrate diffuses with the enzyme, the next action in series is the |
| A. | amino acids may acts as nucleophiles |
| B. | products diffuse away from the active site |
| C. | enzyme-substrate complex is binded |
| D. | product dissolves in capillaries and is carried away. |
| Answer» D. product dissolves in capillaries and is carried away. | |
| 2236. |
Regular rows and shapes of a crystal is an indication of |
| A. | matter capability to decompose |
| B. | matter made up of particles |
| C. | matters ability to evaporate |
| D. | all of these |
| Answer» C. matters ability to evaporate | |
| 2237. |
The most simplified version of the displayed formula is called |
| A. | molecular formula |
| B. | empirical formula |
| C. | structural formula |
| D. | skeletal formula |
| Answer» E. | |
| 2238. |
Units by which hydrogen atom is lighter than hemoglobin is |
| A. | 70000 |
| B. | 58000 |
| C. | 78000 |
| D. | 68000 |
| Answer» E. | |
| 2239. |
A molecule is a smallest particle which can exist |
| A. | independently |
| B. | in combination |
| C. | in space |
| D. | in gas form |
| Answer» B. in combination | |
| 2240. |
The carbon atom which is further attached to four different atoms is called |
| A. | nucleus center |
| B. | neutral center |
| C. | chiral center |
| D. | none of above |
| Answer» D. none of above | |
| 2241. |
First spectrometer used to determine isotopes was |
| A. | Aston's |
| B. | Dempster's |
| C. | Bohr's |
| D. | Aloison's |
| Answer» B. Dempster's | |
| 2242. |
Layers of rock under the surface of the earth is present in |
| A. | water |
| B. | calcium |
| C. | crude oil |
| D. | gold |
| Answer» D. gold | |
| 2243. |
The particles of gas are |
| A. | randomly arranged |
| B. | far apart |
| C. | freely moving |
| D. | all of above |
| Answer» E. | |
| 2244. |
Sodium reacts vigorously with |
| A. | water |
| B. | metals |
| C. | gases |
| D. | none of above |
| Answer» B. metals | |
| 2245. |
The reduction reactions of carbonyl compounds are known to be |
| A. | Nucleophilic addition |
| B. | Nucleophilic substitution |
| C. | addition reaction |
| D. | elimination reaction |
| Answer» B. Nucleophilic substitution | |
| 2246. |
Nitration of a benzene molecule shows the reaction of |
| A. | electrophilic substitution |
| B. | addition reaction |
| C. | nucleophilic substitution |
| D. | none of above |
| Answer» B. addition reaction | |
| 2247. |
Ammonia and amides will produce salts on reacting with |
| A. | water |
| B. | dilute HCl |
| C. | ethylamine |
| D. | concentrated HCl |
| Answer» C. ethylamine | |
| 2248. |
A negative ion is called as |
| A. | anion |
| B. | cation |
| C. | molecule |
| D. | atom |
| Answer» B. cation | |
| 2249. |
Comparing the pH level of ethylamine and ammonia, the stronger base is |
| A. | ammonia |
| B. | ethylamine |
| C. | propylamine |
| D. | methylamine |
| Answer» C. propylamine | |
| 2250. |
The element which perfectly matched the qualities which Mendeleev predicted in his Periodic table was |
| A. | silicon |
| B. | geranium |
| C. | radium |
| D. | radon |
| Answer» C. radium | |