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51. Write the structures of compound A and B in the following reaction:

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52. Prepare propanone from an alkyne with same number of carbon atom.

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53. Ethanal is more soluble in water than ethyl chloride. Explain.

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54. Why is butanone less volatile than ethoxy ethane?

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55. What is the correct order of increasing boiling point?
I: CH₃CH₂CH₂OH,
II:CH₃CH₂OCH₃,
III:CH₃CH₂CHO,
IV:CH₃CH₂CH₃.

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56.

How will you prepare benzaldehyde commercially?

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57.

Write an equation for making aldehydes by the oxo-process.

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58.

Convert acetic acid into acetone.

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Conversion of acetic acid into acetaldehyde.

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60.

In the following electrophilic substitution reaction:

(i) Identify the compound A.
(ii) Write the structure of the electrophile.

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