Which of the following is a Gattermann aldehyde synthesis? from

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 Multiple Choice QuestionsMultiple Choice Questions

541.

In the following reaction,

             C6H5CH2Br (ii)H3O+(i) Mg, EtherX, the product 'X' is

  • C6H5CH2OCH2C6H5

  • C6H5CH2OH

  • C6H5CH3

  • C6H5CH2CH2C6H5


542.

The order of reactivity of phenyl magnesium bromide (PhMgBr) with the following compounds

  • III > II > I

  • II > I > III

  • I > III > II

  • I > II > III


543.

Match the compounds given in List I with List II and select the suitable option using the codes given below.
  List I   List II
A. Benzaldehyde 1. Phenolphthalein
B. Phthalic anhydride 2. Benzoin
condensation
C. Phenyl benzoate 3. Oil of wintergreen
D. Methyl salicylate 4. Fries rearrangement

  • A   B   C   D

    4   1   3   2

  • A   B   C   D

    4   2   3    1

  • A   B   C   D

    2   3   4   1

  • A   B   C   D

    2   1   4    3


544.

An alkene having molecular formula C8H12 on ozonolysis yields glyoxal and 2, 2-dimethyl butane-l, 4-dial. The structure of alkene is


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545.

In a set of reactions acetic acid yielded a product D.

CH3COOH SOCl2A anhy. AlCl3BenzeneB HCNCH2OD

The structure of D would be


546.

CH3-CO-CH3 SeO2 X + Se + H2O: X is

  • None of the above


547.

Which of the following will give Cannizzaro reaction?

  • CH3CHO

  • CH3COCH3

  • (CH3)3C-CHO

  • CH3CH2CHO


548.

The product 'A' is

  • succinic acid

  • melonic acid

  • oxalic acid

  • maleic acid


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549.

Which of the following is a Gattermann aldehyde synthesis?


C.

Gattermann reaction is formylation method of aromatic ring compounds.

In this reaction, the benzene is added with Hydrocyanic acid and Friedel craft's catalyst AlCl3 to form benzene diazonium chloride which on further hydrolysis produces as aldehyde. In such reaction, copper acts as a catalyst.


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550.

Aldol is

  • β-hydroxybutyraldehyde 

  • α-hydroxybutanal

  • β-hydroxypropanal

  • None of the above


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