Q.

184 g ethyl alcohol is mixed with 72 g of water. The ratio of mole fraction of alcohol to water is

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a

3 : 4

b

1 : 2

c

1: 4

d

1 : 1

answer is D.

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Detailed Solution

Number of moles of C2H5OH=18446=4; MC2H5OH=46g/molNumber of moles of H2O=7218=4;               ((MH2O=18 g/mol) Mole fraction, xC2H5OH=44+4=48                      xH2O=44+4=48⇒ xC2H5OHxH2O=4/84/8=11=1:1
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