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Which one of the following atoms will ha...

Which one of the following atoms will have the smallest size ?

A

`11.5`

B

`11.0`

C

23

D

`12.0`

Text Solution

Verified by Experts

The correct Answer is:
A
Molar mass of mixture will be
`M_(mix)=(nxx"Molar mass of "CH_(4)+nxx"Molar mass of "C_(2)H_(6))/(n+n)`
`M_(mix)=(n(16+30))/(2n)=23`
Vapour density `rArr (M_(mix))/(2)=(23)/(2)=11.5`
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