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ICSE Class 10 Chemistry Question 16 of 23

Solved Sample Paper 5 — Question 15

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15
Question

Question 6(iii)

(a) A compound X having vinegar like smell when treated with ethanol in the presence of the acid, Z, gives a compound Y which has a fruity smell.

The reaction is

C2H5OH+X→ZY+H2O\text{C}_2\text{H}_5\text{OH} + \text{X} \xrightarrow{\text{Z}} \text{Y} + \text{H}_2\text{O}

  1. Identify X, Y and Z.
  2. Name the above reaction.

(b) Name the element in period 3 whose affinity is zero.

Answer

C2H5OHethyl alcohol+CH3COOHacetic acid→Conc. H2SO4CH3−COO−C2H5ethyl ethanoate+H2O\underset{\text{ethyl alcohol}}{\text{C}_2\text{H}_5\text{OH}} + \underset{\text{acetic acid}}{\text{CH}_3\text{COOH}} \xrightarrow{\text{Conc. H}_2\text{SO}_4} \underset{\text{ethyl ethanoate}}{\text{CH}_3-\text{COO}-\text{C}_2\text{H}_5} + \text{H}_2\text{O}

(a)

  1. X, Y and Z are:
    • X → Acetic acid
    • Y → Ethyl acetate
    • Z → Concentrated Sulphuric acid
  2. Esterification reaction

(b) Argon