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Hydroxy Compounds and Ethers

12th Chemistry - Hydroxy Compounds and Ethers Model Question Paper

Hydroxy Compounds and Ethers Model Question Paper

12th Standard

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Chemistry

Time : 00:45:00 Hrs
Total Marks : 35
    5 x 1 = 5

  1. An alcohol (x) gives blue colour in victormayer’s test and 3.7g of X when treated with metallic sodium liberates 560 mL of hydrogen at 273 K and 1 atm pressure what will be the possible structure of X?

    (a)

    CH3 CH (OH) CH2CH3

    (b)

    CH3 – CH (OH) – CH3

    (c)

    CH3 – C (OH) – (CH3)2

    (d)

    CH3- CH2 –CH (OH) – CH2 – CH3

  2. Which one of the following will react with phenol to give salicyladehyde after hydrolysis.

    (a)

    Dichlo methane

    (b)

    trichloroethane

    (c)

    trichloro methane

    (d)

    CO2

  3. (CH3)3-C-CH(OH) CH3 \(\overset { con{ H }_{ 2 }{ SO }_{ 4 } }{ \longrightarrow } \)X (major product)

    (a)

    (CH3)3 CCH = CH2

    (b)

    (CH3)2C = C (CH3)2

    (c)

    CH2= C(CH3)CH2-CH2- CH3

    (d)

    CH2= C (CH3) - CH2- CH2- CH3

  4. In the reaction Ethanol \(\overset { { PCl }_{ 5 } }{ \longrightarrow } X\overset { alc.KOH }{ \longrightarrow } Y\overset { { H }_{ 2 }{ SO }_{ 4 }/{ H }_{ 2 }O }{ \underset { 298k }{ \longrightarrow } } Z.\) The ‘Z’ is ______.

    (a)

    ethane

    (b)

    ethoxyethane

    (c)

    ethylbisulphite

    (d)

    ethanol

  5. Which of the following compound can be used as antifreeze in automobile rediators?

    (a)

    methanol

    (b)

    ethanol

    (c)

    Neopentyl alcohol

    (d)

    ethan -1, 2-diol

    6. 3 x 2 = 6

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

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

  8. Can we use nucelophiles such as NH3,CH3O - for the Nucleophilic substitution of alcohols

    9. 3 x 3 = 9

  9. Explain Kolbe’s reaction

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

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

    12. 3 x 5 = 15

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

  13. 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.

  14. 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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