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An isotope of hydrogen atom is represent...

An isotope of hydrogen atom is represented as X which follows Bohr'r model and exists as diatomic gaseous molecule `"X"_(2).` Also the normal boiling point of a compound `"X"_(2)"O"` liquid is found to be `101^(@)"C"` and that of a solution obtained on dissolved 0.1 moles of NaCl in 1 Kg of `"X"_(2)"O"` liquid is `101.4^(@)"C".` It is also known that the ionization energy of X is equal to 14eV
The value of ebullioscopic constant of `"X"_(2)"O"` is given by:

A

`4"K kg mol"^(-1)`

B

`2"K kg mol"^(-1)`

C

`0.4"K kg mol"^(-1)`

D

`1"K kg mol"^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
`Delta "T"_("b")="i K"_("b")"m"`
`Delta "T"_("b")=101.4-101=0.4`
`0.4="iK"_("b")"m"`
For NaCl i=2
`0.4=2xx"K"_(b")xx0.1/1`
`"K"_("b")=2"K kg mol"^(-1)`
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