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Hydroxy Compounds and Ethers 3 Mark Book Back Question Paper With Answer Key

12th Standard

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Chemistry

Time : 01:30:00 Hrs
Total Marks : 51

     3 Marks

    17 x 3 = 51
  1. Identify the product (s) is / are formed when 1 – methoxy propane is heated with excess HI. Name the mechanism involved in the reaction.

  2. Draw the major product formed when 1-ethoxyprop-1-ene is heated with one equivalent of HI.

  3. Suggest a suitable reagent to prepare secondary alcohol with identical group using Grignard reagent.

  4. What is the major product obtained when two moles of ethyl magnesium bromide is treated with methyl benzoate followed by acid hydrolysis.

  5. Predict the major product, when 2-methyl but -2-ene is converted into an alcohol in each of the following methods.
    (i) Acid catalysed hydration
    (ii) Hydroboration
    (iii) Hydroxylation using Baeyer's reagent

  6. Arrange the following in the increasing order of their boiling point and give a reason for your ordering
    (i) Butan – 2- ol, Butan -1-ol, 2 –methylpropan -2-ol
    (ii) Propan -1-ol, propan -1,2,3-triol, propan -1,3 – diol, propan -2-ol

  7. Can we use nucelophiles such as NH3,CH3- for the Nucleophilic substitution of alcohols

  8. Is it possible to oxidise t – butyl alcohol using acidified dichromate to form a carbonyl compound.

  9. What happens when 1-phenyl ethanol is treated with acidified KMnO4.

  10. Write the mechanism of acid catalysed dehydration of ethanol to give ethene.

  11. How is phenol prepared from
    i) chloro benzene
    ii) isopropyl benzene

  12. Explain Kolbe’s reaction

  13. Write the chemical equation for Williamson synthesis of 2-ethoxy – 2- methyl pentane starting from ethanol and 2 – methyl pentan -2-ol.

  14. What will be the product (X and A) for the following reaction acetylchloride \(\frac{\text { i) } \mathrm{CH}_{3} \mathrm{MgBr}}{\text { ii) } \mathrm{H}_{3} \mathrm{O}^{+}}{\longrightarrow} \mathrm{X} \stackrel{\text { acid } \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}{\longrightarrow}\) 

  15. How will you convert acetylene into n-butyl alcohol.

  16. Phenol is distilled with Zn dust followed by friedel – crafts alkylation with prophyl chloride to give a compound B, B on oxidation gives (c) Indentify A,B and C.

  17. 0.44g of a monohydric alcohol when added to methyl magnesium iodide in ether liberates at STP 112 cm3 of methane with PCC the same alcohol form a carbonyl compound that answers silver mirror test. Identify the compound.

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