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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 85151. |
Alcoholic potash is used to bring about |
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Answer» dehydrohalogenation `R- CH_(2) - underset(underset(Cl)(|))(CH) - R' underset(-HCl)OVERSET(alc.KOH)rarr R- CH = CH- R'` |
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| 85152. |
Alcoholic sol of KOH is used for : |
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Answer» Dehydration |
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| 85154. |
Action of soap is due to emulsification and micelle formation. Comment |
| Answer» Solution :Soap stabilises the emulsion between GREASE and water by FORMING micelles AROUND the grease (and DIRT). | |
| 85155. |
Alcoholic H_(2)PtCl_(6) is also known as |
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Answer» Speier's CATALYST |
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| 85156. |
Action of soap is due to emulsification and micelle formation, Comment . |
Answer» Solution :Soap molecule has two parts : Hydrophobic and hydrophilic. The first one attaches with oily DIRT and the second attaches with water.  (a) Fig. (a) Arrangement of stearate ions on the surface of water at low concentrations of soap (b) Arrangement of stearate ions inside the bulk of water (ionic micelle) at critical micelle concentrations of soap. As the dirty cloth is agitated in soap solution, several soap molecules arrange themselves radially, each attached with OIL at one end and water on the other end. So, dirt is removed from the cloth and an emulsion of oily dirt and water is formed in the soap solution. Thus, soap HELPS in EMULSIFICATION and washing away of oily dirt from the cloth.  Fig. (a) Grease on cloth (b) Stearate ion arranging around the grease droplet and (c) Grease due. |
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| 85157. |
Action of RMgX with vinyl chloride gives: |
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Answer» ALKANE |
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| 85158. |
Alcoholic fermention of sugar gives 3% glycerol. The yield can be increased to 25% if fermentation is made in presence of : |
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Answer» `Na_2SO_4` |
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| 85159. |
Action of PCl_3 on salicylic acid produces |
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Answer» o-chlorobenzoic ACID |
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| 85160. |
Actionof nitrousacidwith ethylamineproduces |
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Answer» ETHANE |
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| 85161. |
Alcoholic fermentation is ________ process : |
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Answer» SLOW decomposition |
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| 85162. |
Action of nitrous acid on ethyl amine gives : |
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Answer» `C_2H_6` |
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| 85163. |
Action of NaNO_(2)+dil HCl on ArNH_(2) yields ArN_(2)^(+)Cl^(-). A similar reaction with cyclohexylamine will yield. |
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Answer»
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| 85164. |
Action of nitrous acid on ethyl amine gives |
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Answer» `C_2H_6` |
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| 85165. |
Action of KI on Benzene diazonium chloride yields |
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Answer» SYM triiodobenzene |
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| 85166. |
Alcoholic fermentation is brought about by the action of: |
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Answer» `CO_(2)` |
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| 85167. |
Action of hydrogen chloride on CH_3-underset(CH_3)underset|C=CH_2 and on CH-=CH will predominantly give the compounds, reapectively |
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Answer» `CH_3-undersetunderset(CH_3)(|)CH-CH_2Cl` and `CH_2Cl-CH_2Cl` `CH-=CH+HCl to CH_2 =CH-Cl OVERSET"HCl"to CH_3-CHCl_2` |
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| 85168. |
Alcoholic fermentation is brought about by the action of |
| Answer» ANSWER :D | |
| 85169. |
Action of HNO_(2) on CH_(3)NH_(2) gives |
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Answer» `CH_(3)OH` 
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| 85170. |
Action of heavy water (D_2O) on methylmagnesium bromide gives |
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Answer» `CD_(4)` |
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| 85171. |
Actionof heaton a mixtureof sodiumpropionateandsodalimeprodues : |
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Answer» METHANE |
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| 85172. |
Alcoholic fermentation by starch or sugar is braught about by : |
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Answer» `CO_2` |
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| 85173. |
Action of HCl on Benzene diazonium chloride in the presence of copper powder gives |
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Answer» p-chloro BENZENE DIAZONIUM chloride |
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| 85174. |
Alcoholic beverages contain |
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Answer» `CH_(3)OH` |
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| 85175. |
Action of copper alkyl on vinyl chloride gives: |
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Answer» ALKANE |
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| 85176. |
Alcohol which gives red colour with Victor Meyer test is |
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Answer» `C_(2)H_(5)OH` |
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| 85177. |
Action of caustic soda and chlorine on ethyl alcohol gives |
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Answer» Chloroform |
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| 85178. |
Alcoholic "AgNO"_(3) does not give precipitate with: |
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Answer» `C_(6)H_(5)CH_(2)`CL |
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| 85180. |
Actinoid contraction is more than lanthanoid contraction because |
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Answer» Energy of 4 f and 5f ORBITALS are same |
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| 85181. |
Actinoid contraction is greater from elements to element than landthanoid contraction. Why? |
| Answer» SOLUTION :This is because of POOR SHEILDING by 5f-electrons in the ACTINOIDS than that by 4f-electrons in the LANTHANOIDS | |
| 85182. |
Alcohol is not used in making : |
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Answer» Chloral |
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| 85183. |
Alcohol has….vapour pressure than water at the same temperature |
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Answer» more Lower is b.pt. of SOLVENT more is vapour PRESSURE. |
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| 85184. |
Alcohol has ………. Vapour pressure than water at the same temperature : |
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Answer» More |
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| 85185. |
Actinoid contraction is greater from element to element than lanthanoid contraction. why? |
| Answer» Solution : The decrease in atomic radii in actinoid ELEMENTS is GREATER than lanthanoid contraction because 5f electrons have poor shielding effect as COMPARED to 4f electrons. Therefore, the effect of increased NUCLEAR CHARGE leading to contraction in size is more in case of actinoid elements. | |
| 85186. |
Alcohol containing least number of carbon which can be prepared using Gringnard reagent is : |
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Answer» `(CH_3)_2CHOH` |
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| 85187. |
Actinoid contraction is greater from element to element than the lanthanoid contraction, why? |
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Answer» Solution :(i) Actinoid contraction is greater from ELEMENT to element than lanthanoid contraction. The 5f orbitals in Actinoids have a very poorer shielding effect than 4f orbitals in lanthanoids. (ii) Thus, the effective nuclear charge experienced by electron in valence shells in CASE of k actinoids is MUCH more than that experienced by lanthanoids. (iii) n actinoids, electrons are shielded by 5d, 4f, 4d and 3d whereas in lanthanoids, electrons are shielded by 4d, 4f only. (iv) Hence, the size contraction in actinoids is greater as COMPARED to that in lanthanoids. |
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| 85188. |
Alcohol CANNOT be used in the manufacture of _________. |
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Answer» chloral |
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| 85189. |
Alcohol can act as Bronsted base. Prove this statemen. |
Answer» Solution :ALCOHOLS can also act as a BRONSTED bases. It is due to the presenee of unshared electron PAIRS on oxygen which make them to accept PROTON. So proton aceeptor are Bronsted bases. i.e., alcohols are Bronsted bases.
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| 85190. |
Actinoid contraction is greater from element to element than lanthanoid contraction . Why ? |
| Answer» SOLUTION :This is DUE to poor shieldingby 5f ELECTRONS in the actinoids than that by 4F electrons in the lanthanoids. | |
| 85191. |
Alcohol can act as Bronsted base. Prove this statement. |
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Answer» Solution :Alcohols can also ACT as a Bronsted bases. It is due to the presence of UNSHARED electron pairs on oxygen which MAKE them to accept PROTON. So proton acceptor are Bronsted bases. i.e., alcohols are Bronsted bases. 
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| 85192. |
Actinoid contraction is greater from element to element than lanthanoid contraction. Why ? |
| Answer» Solution :This is due to poor SHIELDING by 5F electrons in the ACTINOIDS than that by 4f electrons in the lanthanoids. | |
| 85193. |
Alcohol are stronger acids than alkanes. This is clear fromthe reaction |
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Answer» `2ROH + 2 Na to 2RO^(-)Na^(+)+H_(2)` |
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| 85194. |
Actinodcontractionis greaterfrom elementto elementthan thelanthanoidcontraction, why ? |
| Answer» SOLUTION :Actinoidcontractionis greaterthanelementto elementthanlanthanoidcontraction. Thesesf ORBITALS have a poorershieldingeffectthan4forbitals . Thusthe effectivenuclearchangeexperiencedby ELECTRONSIS muchmore THANTHAT experiencedby LANTHANOID .Soactinoidshowgreatercontraction. | |
| 85195. |
Alcohol A (C_(10)H_(18)O) is converted into mixture of alkene B and C on heating with conc. H_(3)PO_(4). Catalytic hydrogenation of B and C yields the same product. Assuming that dehydration of alcohol A proceed without rearrangement. Alkene B on ozonolysis form cyclopentanone. Identify the correct options. |
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Answer»
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| 85196. |
Actinides form oxocation because of |
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Answer» actinide contraction |
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| 85197. |
Actinides have higher tendency to form complexes than Lanthanides, due to |
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Answer» HIGHER CHARGE and SMALLER SIZE |
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| 85198. |
Alcohl can be prepared by which of the following methods ? |
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Answer» By HYDRATION of alkene |
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| 85199. |
Actinides exhibits oxidation state |
| Answer» Answer :D | |
| 85200. |
AlCl_3 on hydrolysis gives : |
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Answer» `Al_2O_3. H_2O` |
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