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Aldehydes, Ketones and Carboxylic Acids

Short Answer Type

61. Draw (i) resonance structure and (ii) an atomic orbital representation of the methanol.

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62. What happens when 3-methyl but-2-ene is treated with ozone and the product is reduced?

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63. What happens when 2-methyl butene-2 is ozonised and this product is reduced?

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64.

Write the equation for the reaction when 2,3-dimethyl butene-2 is treated with ozone and the ozonide is reduced.

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65. How will you prepare (i) ethanal from ethyne and (ii) propanone from propyne?

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66.
How will you prepare benzaldehyde from phenol?

Step 1. Phenol on treatment with chloroform and KOH (Reimer-Tiemann reaction) yields salicylaldehyde.
2. Salicylaldehyde on distillation with zinc dust will form benzaldehyde.

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67.

How will you obtain benzophenone from benzene

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68. How will you prepare acetaldehyde from acetylene?

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69. Prepare ethanal from ethanoly chloride by reduction method.

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70.

Give the industrial preparation of ethanal.

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Previous Year Papers

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Test Yourself

Short Answer Type

66. How will you prepare benzaldehyde from phenol?

66.
How will you prepare benzaldehyde from phenol?