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138 g of ethyl alcohol is mixed with 72 ...

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

A

`3:4`

B

`1:2`

C

`1:4`

D

`1:1`

Text Solution

Verified by Experts

The correct Answer is:
A
`"Number of moles of "C_(2)H_(5)OH=(138)/(46)=3`
`"Number of moles of "H_(2)O=(72)/(18)=4`
`"Mole fraction, "x_(c_(2)H_(5)OH)=(3)/(7)`
`x_(H_(2)O)=(4)/(7)`
`(x_(C_(2)H_(5)OH))/(x_(H_(2)O))=(3//7)/(4//7)=(3)/(4)`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-SOLUTIONS AND COLLIGATIVE PROPERTIES -Exercise 2 (Miscellaneous Problems)
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