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The surface tension of water of 20^(@) i...

The surface tension of water of `20^(@)` is 72.75 dyne `cm^(-1)` . Its value in SI system is

A

2.275 `Nm^(-1)`

B

0.7275 `Nm^(-1)`

C

0.07275 `Nm^(-1)`

D

None of the above

Text Solution

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The correct Answer is:
C
PV=nRT , 1` xx` 22.4 = n`xx` 0.082 `xx` 303 , n= 0.90 mol
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