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MDCAT Chemistry Chapter 14 Chemistry of Hydrocarbons Online Test
| Sr. # | Questions | Answers Choice |
|---|---|---|
| 1 | Which of the following reactions does not involve formation of carbocation? | SN1 and E1 El and E2 SN1 and SN2 E2 and SN2 |
| 2 | To prepare ethane by Wurtz synthesis the suitable alkyl halide is |
Ethyl iodide any alkyl iodide Ethyl chloride Methyl bromide |
| 3 | Reaction of ethyl bromide with ammonia | <div>Completes in a single step</div><div><br></div> Completes in two steps Continues till N is left with no lone pair is reversible |
| 4 | In beta elimination reaction | carbon number changes unsaturated compound is formed hybridization. ofC remains same pi bonds are decreased |
| 5 | Which is an intermediate in SN1 reaction | Ethoxide ion Carbocation alkyl halide alkene |
| 6 | The reagent for alkaline hydrolysis of ethyl bromide to form ethyl alcohol is | water at room T Alcoholic KOH+heat Ethanol + heat dil. NaOH+ heat |
| 7 | Which pair gives same dehydrohalogenation product | <div>I-Chlorobutane, 2-Chlorobutane</div><div><br></div> I-Chloropropane, 2-Chloropropane I-Bromopentane. 3-Bromopentane iso-butvl chloride. 2°- butyl chloride |
| 8 | In an elimination reaction a more substituted alkene is formed due to the stability associated with | Free radical transition state Activated complex Carbocation |
| 9 | Dehydrohalogenation of secondary butyI bromide will give | Propene 1-Butene Butene 2-Butene |
| 10 | Which of the following reactants will be required to form ethene from ethyl chloride | <sub>Alcoholic KOH</sub> Alkaline KMnO4 Aqucous KOH Aqucous NaOH |
| 11 | Which one among the following is not a good leaving group | HSO4- CI- OH- Br- |
| 12 | In nucleophilie substitution bimolecular reaction the order of reaction with respect to substrate | 2 order 3 order 1st order Zero order |
| 13 | Which compound is obtained hy the elimination reaction on bromoethane? | Butene Ethene Propene Propane |
| 14 | When 2-bromobutane reacts with alcoholic KOH, the reaction is called | Chlorination Halogenation Dehydrohalogenation Hydrogenation |
| 15 | Which of the following alkyl halides undergoes SN1 reaction fastest | Methyl chloride Isobutyl chlorido Ethy l chloride Tertiary butyl chloride |
| 16 | A mixture of 1-chloropropane and 2-chloro-propane when treated with alcoholic KOH, gives | Prop-2-ene Isopropy lene Propene A mixture of prop-l-ene |
| 17 | In elimination reaction i.e, in the formation of alkene, the reactivity of alkyl halide is in the order: | CI>Br>I I>Br>Cl Br>CI>I I>CI> Br |
| 18 | The species which are produced by heterolytic bond breaking and can act as electron pair donor | Free radicals Cations Nucleophiles electrophile |
| 19 | Among the following, which one is nucleophile | H+ Ca2+ OH- Na+ |
| 20 | Which is an intermediate in Svl | Ethoxide ion Alkene Alkyl halide Carbocation |
