*/*_The rough value of diffusion co-efficient of water vapor into air – McqOptions

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1.	/_The rough value of diffusion co-efficient of water vapor into air at 25¬¨‚àûC may be about __________ cm¬¨‚â§/sec.?
A.	0.25
B.	2.5
C.	1.25
D.	0.0025
Answer» B. 2.5

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