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7. Alcohol, phenol and ethers — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistry7. Alcohol, phenol and ethers1 Mark
MCQ
Carbon percentage is maximum in
  • A
    Pyrene
  • B
    Gammexane
  • ✓
    Ethylene glycol
  • D
    PVC
✓

Answer

Correct option: C.
Ethylene glycol
c
(c) $\%$ of $C = \frac{{{\rm{Mass}}\,\,{\rm{of}}\,\,C}}{{{\rm{Mass}}\,\,{\rm{of}}\,\,{\rm{substance}}}} \times 100$

$CC{l_4} = \frac{{12}}{{154}} \times 100 = 7.79\,\% $

${C_6}{H_6}C{l_6} = \frac{{72}}{{291}} \times 100 = 24.74\,\% $

$C{H_2}OH - C{H_2}OH = \frac{{24}}{{62}} \times 100 = 38.70\,\% $.
 

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