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Carbonyl Compounds Model Question Paper

12th Standard

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Chemistry

Time : 00:45:00 Hrs
Total Marks : 30
    6 x 1 = 6
  1. The formation of cyanohydrin from acetone is an example of _______.

    (a)

    nucleophilic substitution

    (b)

    electrophilic substitution

    (c)

    electrophilic addition

    (d)

    Nucleophilic addition

  2. In the following reaction, \(HC\equiv CH \overset { { H }_{ 2 }{ SO }_{ 4 } }{ \underset { HgS{ O }_{ 4 } }{ \longrightarrow } } X\) Product ‘X’ will not give _______.

    (a)

    Tollen’s test

    (b)

    Victor meyer test

    (c)

    Iodoform test

    (d)

    Fehling solution test

  3. Benzoic acid \(\overset { i){ NH }_{ 3 } }{ \underset { ii)\Delta }{ \longrightarrow } } A\overset { NaOBr }{ \longrightarrow } B\overset { NaN{ O }_{ 2 }/HCl }{ \longrightarrow } \) C 'C'  is ______.

    (a)

    anilinium chloride

    (b)

    O – nitro aniline

    (c)

    benzene diazonium chloride

    (d)

    m– nitro benzoic acid

  4. Which one of the following reduces tollens reagent

    (a)

    formic acid

    (b)

    acetic acid

    (c)

    benzophenone

    (d)

    none of these

  5. Which one of the following undergoes reaction with 50% sodium hydroxide solution to give the corresponding alcohol and acid.

    (a)

    Phenylmethanal

    (b)

    ethanal

    (c)

    ethanol

    (d)

    methanol

  6. Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their ________.

    (a)

    more extensive association of carboxylic acid via van der Waals force of attraction

    (b)

    formation of carboxylate ion

    (c)

    formation of intramolecular H-bonding

    (d)

    formation of intermolecular H – bonding

  7. 4 x 2 = 8
  8. How is propanoic acid is prepared starting from
    (a) an alcohol
    (b) an alkylhalide
    (c) an alkene

  9. State the laws of reflection.

  10. Give the characteristics of image formed by a plane mirror.

  11. Derive the relation between f and R for a spherical mirror.

  12. 2 x 3 = 6
  13. How will you convert benzaldehyde into the following compounds?
    (i) benzophenone
    (ii) benzoic acid
    (iii) α-hydroxyphenylaceticacid.

  14. What is the action of HCN on
    (i) propanone
    (ii) 2,4-dichlorobenzaldehyde
    iii) ethanal

  15. 2 x 5 = 10
  16. Write the structure of the major product of the aldol condensation of benzaldehyde with acetone.

  17. Complete the following reaction
    \({ CH }_{ 3 }-{ CH }_{ 2 }-{ CH }_{ 2 }-\underset { \overset { || }{ O } }{ C } -{ CH }_{ 3 }\overset { HO-{ CH }_{ 2 }-{ CH }_{ 2 }-OH }{ \underset { { dry }{ HCl} }{ \longrightarrow } } ?\)

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