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Hydroxy Compounds and Ethers Model Question Paper

12th Standard

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Chemistry

Time : 01:30:00 Hrs
Total Marks : 40
    5 x 1 = 5
  1. Which of the following compounds on reaction with methyl magnesium bromide will give tertiary alcohol.

    (a)

    benzaldehyde

    (b)

    propanoic acid

    (c)

    methyl propanoate

    (d)

    acetaldehyde

  2. In the reaction sequence, Ethane \(\overset { HOCl }{ \longrightarrow } A\overset { x }{ \longrightarrow } \) ethan -1, 2 - diol. A and X respectively are ________.

    (a)

    Chloroethane and NaOH

    (b)

    ethanol and H2SO4

    (c)

    2 – chloroethan -1-ol and NaHCO3

    (d)

    ethanol and H2O

  3. Carbolic acid is _____.

    (a)

    Phenol

    (b)

    Picri cacid

    (c)

    benzoic acid

    (d)

    phenylacetic acid

  4. HO CH2 CH2 – OH on heating with periodic acid gives  ______.

    (a)

    methanoic acid

    (b)

    Glyoxal

    (c)

    methanol

    (d)

    CO2

  5. On reacting with neutral ferric chloride, phenol gives  ______.

    (a)

    red colour

    (b)

    violet colour

    (c)

    dark green colour

    (d)

    no colouration.

  6. 4 x 2 = 8
  7. Identify the product (s) is / are formed when 1 – methoxy propane is heated with excess HI. Name the mechanism involved in the reaction.

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

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

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

  11. 4 x 3 = 12
  12. Write the mechanism of acid catalysed dehydration of ethanol to give ethene.

  13. Explain Kolbe’s reaction

  14. Write the structure of the aldehyde, carboxylic acid and ester that yield 4- methylpent -2-en-1-ol.

  15. What is metamerism? Give the structure and IUPAC name of metamers of 2-methoxy propane

  16. 3 x 5 = 15
  17. What will be the product (X and A) for the following reaction acetylchloride \(\frac{\text { i) } \mathrm{CH}_{3} \mathrm{MgBr}}{\text { ii) } \mathrm{H}_{3} \mathrm{O}^{+}}{\longrightarrow} \mathrm{X} \stackrel{\text { acid } \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}{\longrightarrow}\) 


  18. Identify A,B,C,D and write the complete equation

  19. Complete the following reactions 
    i) CH3- CH2 - OH \(\overset { { P}{ Br_3 }{ } }{ \underset { {} }{ \longrightarrow } }\)  A  \(\overset { { aq.NaOH}{ }{ } }{ \underset { {} }{ \longrightarrow } }\) B \(\overset { { Na}{ } }{ \underset { {} }{ \longrightarrow } }\) C
    ii) C6H5- OH  \(\overset { { Zn \ dust}{ } }{ \underset { {} }{ \longrightarrow } }\) A \(\overset { { CH_3}{Cl}{ } }{ \underset { {Anhydrs}{AlCl_3} }{ \longrightarrow } }\) B \(\overset { { acid}{K MnO_4}{ } }{ \underset { {} }{ \longrightarrow } }\) C

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