MCQOPTIONS
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MCQOPTIONS
This section includes 376 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
Group-IV oxides are stable to |
| A. | water |
| B. | acids |
| C. | pressure |
| D. | temperature |
| Answer» E. | |
| 152. |
Tetrachloride with the lowest boiling point is |
| A. | SiCl₄ |
| B. | CCl₄ |
| C. | SnCl₄ |
| D. | PbCl₄ |
| Answer» B. CCl₄ | |
| 153. |
The elements of group II in periodic table are also known as |
| A. | alkaline earth metals |
| B. | alkalis |
| C. | bases |
| D. | acids |
| Answer» B. alkalis | |
| 154. |
In transition elements atoms after filling 4s-orbital, the rest of electrons reside in |
| A. | 3d sub shell |
| B. | 2d sub shell |
| C. | 4s sub shell |
| D. | 4p sub shell |
| Answer» B. 2d sub shell | |
| 155. |
The temperature at which thermal decomposition of metal nitrates (e.g. Ca(NO)₃) of Group-II takes place, |
| A. | increases along the Period2 |
| B. | increases down the group |
| C. | decreases down the group |
| D. | remains constant across the Group II metals |
| Answer» C. decreases down the group | |
| 156. |
At room temperature phosphorus and sulfur are |
| A. | solid |
| B. | liquid |
| C. | gas |
| D. | molten |
| Answer» B. liquid | |
| 157. |
Concrete sets when arranged with iron rods passes through it, improves it |
| A. | strength |
| B. | style |
| C. | shape |
| D. | texture |
| Answer» B. style | |
| 158. |
Sulfur chloride (SCl₂) has oxidation number of |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 159. |
In ethoxide (C₂H₅ONa), the electron (e⁻) donating group attached to oxygen atom (O) is |
| A. | ethyl |
| B. | methyl |
| C. | carbonyl |
| D. | Acyl |
| Answer» B. methyl | |
| 160. |
Farmers raise the pH of acidic soil by using |
| A. | limestone |
| B. | slake lime |
| C. | pure lime |
| D. | grey lime |
| Answer» C. pure lime | |
| 161. |
Caprolactam is made up of |
| A. | 6-amino hexanedioic acid |
| B. | NH₂ group |
| C. | COOH group |
| D. | all of above |
| Answer» E. | |
| 162. |
What is true about metals? |
| A. | they are reducing agents |
| B. | they are oxidizing agents |
| C. | they are redox agents |
| D. | they are re-agents |
| Answer» B. they are oxidizing agents | |
| 163. |
Chemists have produced low sulfur version of petrol and diesel to reduce the emission of |
| A. | sulfur dioxide |
| B. | carbon dioxide |
| C. | carbon monoxide |
| D. | sulfur trioxide |
| Answer» B. carbon dioxide | |
| 164. |
The carbonyl group in aldehyde is |
| A. | C=O |
| B. | C-O |
| C. | CO |
| D. | CHO |
| Answer» B. C-O | |
| 165. |
The least volatile element is |
| A. | iodine |
| B. | fluorine |
| C. | bromine |
| D. | chlorine |
| Answer» B. fluorine | |
| 166. |
The double bonds between carbon (C) atoms is due to overlapping of two p-orbitals forming |
| A. | sigma bond |
| B. | pi bond |
| C. | ionic bond |
| D. | co-ordinate bond |
| Answer» C. ionic bond | |
| 167. |
Sulfur compounds are present as impurities in |
| A. | crude oil |
| B. | natural gas |
| C. | coal |
| D. | all of above |
| Answer» E. | |
| 168. |
Nylon-6 is made from |
| A. | condensation reaction |
| B. | caprolactum |
| C. | hexanedioic acid |
| D. | none of above |
| Answer» C. hexanedioic acid | |
| 169. |
Period 3 element that has the highest electronegativity is |
| A. | Na |
| B. | Al |
| C. | P |
| D. | S |
| Answer» E. | |
| 170. |
Commonly transition elements have high |
| A. | densities only |
| B. | melting points only |
| C. | volatility rate |
| D. | densities and melting points |
| Answer» E. | |
| 171. |
The volatility of the Halogens can be estimated through the |
| A. | Atomic Radii |
| B. | Melting Point |
| C. | Boiling Point |
| D. | Sublimation point |
| Answer» D. Sublimation point | |
| 172. |
The effects of CFC can be retained in the atmosphere for up to a/an |
| A. | hundred years |
| B. | few months |
| C. | year |
| D. | week |
| Answer» B. few months | |
| 173. |
Down the group, the boiling points of Halogens |
| A. | increase |
| B. | decrease |
| C. | remain steady |
| D. | may vary |
| Answer» B. decrease | |
| 174. |
The elements of group VII elements are called |
| A. | noble gases |
| B. | halogens |
| C. | metals |
| D. | alkalis |
| Answer» C. metals | |
| 175. |
The transition elements are all |
| A. | metals |
| B. | non-metals |
| C. | alkalis |
| D. | gases |
| Answer» B. non-metals | |
| 176. |
In World War II, parachutes were made by |
| A. | polymers |
| B. | nylon |
| C. | caprolactum |
| D. | none of above |
| Answer» C. caprolactum | |
| 177. |
Upon reaction of Cl₂(aq) and H₂O (l), HCl and HClO (aq) is formed, resulting in the killing of |
| A. | bacteria |
| B. | germs |
| C. | insects |
| D. | none of above |
| Answer» E. | |
| 178. |
A very small amount of electrical conductivity is measured in |
| A. | silicon (Si) only |
| B. | geranium only |
| C. | diamond |
| D. | silicon and geranium |
| Answer» E. | |
| 179. |
Sulfur dioxide (SO₂) is obtained on burning of |
| A. | fossils fuel only |
| B. | coal only |
| C. | lime |
| D. | fossils fuel and coal |
| Answer» E. | |
| 180. |
Down the group, the hydrogen halides could be |
| A. | more stable |
| B. | less thermally stable |
| C. | more reactive |
| D. | less reactive |
| Answer» C. more reactive | |
| 181. |
Ion which is more effective nucleophile than water is |
| A. | negatively charged hydroxide |
| B. | carbocation |
| C. | anion |
| D. | hydroxyl ion |
| Answer» B. carbocation | |
| 182. |
A small amount of chlorine added to water can |
| A. | purify it |
| B. | kill bacteria |
| C. | safer to drink |
| D. | all of above |
| Answer» E. | |
| 183. |
The primary amine in which nitrogen is attached to only one alkyl group is |
| A. | ethylamine |
| B. | diethyl amine |
| C. | monoamine |
| D. | amide |
| Answer» B. diethyl amine | |
| 184. |
One of the four elements that have the greatest metallic radii is |
| A. | Beryllium (Be) |
| B. | Calcium (Ca) |
| C. | Strontium (Sr) |
| D. | Magnesium (Mg) |
| Answer» D. Magnesium (Mg) | |
| 185. |
Secondary alcohol forms ketone and water by reacting with |
| A. | oxygen atom |
| B. | oxygen molecule |
| C. | ozone molecule |
| D. | oxygen ion |
| Answer» B. oxygen molecule | |
| 186. |
In the Period table, the elements with 2 electrons in the outermost principal quantum shell are present in |
| A. | Period 2 |
| B. | Period 3 |
| C. | Group-II |
| D. | Group-III |
| Answer» D. Group-III | |
| 187. |
Hess's law states that a chemical reaction is independent of the route by which chemical reactions takes place while keeping the same |
| A. | initial conditions only |
| B. | final conditions only |
| C. | mid-conditions |
| D. | initial and final conditions |
| Answer» E. | |
| 188. |
The two outermost electrons occupy an s-orbital in the elements of |
| A. | Period 2 |
| B. | Period 3 |
| C. | Group-II |
| D. | Group-III |
| Answer» D. Group-III | |
| 189. |
The brown gas which is found on heating group Ii nitrate is toxic |
| A. | sulfur dioxide |
| B. | nitrogen dioxide |
| C. | carbon dioxide |
| D. | silicon dioxide |
| Answer» C. carbon dioxide | |
| 190. |
The compound with the oxidation of +4 is |
| A. | Tin (IV) oxide SnO₂ |
| B. | Lead (IV)oxide PbO₂ |
| C. | Carbon dioxide CO₂ |
| D. | all of above |
| Answer» E. | |
| 191. |
Each chlorine ion tends to destroy oz1 molecules in an amount |
| A. | million |
| B. | trillion |
| C. | billion |
| D. | zillion |
| Answer» B. trillion | |
| 192. |
Least volatile halogen is |
| A. | F₂ |
| B. | Cl₂ |
| C. | Br₂ |
| D. | I₂ |
| Answer» E. | |
| 193. |
Halogenated hydrocarbons are used in |
| A. | refrigerators |
| B. | aerosols |
| C. | shaving creams |
| D. | body sprays |
| Answer» C. shaving creams | |
| 194. |
Recycle bottles of plastic are made from |
| A. | Terylene |
| B. | nylon |
| C. | caprolactum |
| D. | polyvinyl chloride |
| Answer» B. nylon | |
| 195. |
PLA is another polyester name for |
| A. | polyacid |
| B. | polyesters |
| C. | polylactic acid |
| D. | polytone |
| Answer» D. polytone | |
| 196. |
If a halogen is heated with ammonia dissolved in ethanol, it ill form an |
| A. | ammonia |
| B. | amine |
| C. | ammonium |
| D. | amino acid |
| Answer» C. ammonium | |
| 197. |
Phenol is a stronger acid than water and itself it is |
| A. | weakly acidic |
| B. | weakly basic |
| C. | alkali |
| D. | strong acid |
| Answer» B. weakly basic | |
| 198. |
Across the period, the nuclear charge |
| A. | increase |
| B. | decreases |
| C. | constant |
| D. | same |
| Answer» B. decreases | |
| 199. |
The features included in group VII elements are |
| A. | non-metals |
| B. | diatomic molecules |
| C. | single covalent bond |
| D. | all of above |
| Answer» E. | |
| 200. |
Oxidation of hydrogen halides become easier going |
| A. | across the periods (left to right) |
| B. | down the groups |
| C. | up the groups |
| D. | across the period (right to left) |
| Answer» C. up the groups | |