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10% sites of catalyst bed have adsorbed ...

10% sites of catalyst bed have adsorbed by `H_2`. On heating `H_2` gas is evolved from sites and collectedat 0.03 atm and 300 K in a small vessel of 2.46 `cm^3`. No. of sites available is `5.4 xx 10^(16)` per `cm^2` and surfacearea is 1000 `cm^2`. Find out the no. of surface sites occupied per molecule of `H_2 : ["Given" N_A = 6 xx 10^(23)]`

A

1

B

2

C

3

D

4

Text Solution

Verified by Experts

The correct Answer is:
C
Adsorbed moles of `H_(2)=(0.03xx2.46 xx10^(-3))/(0.0821 xx300)=3xx10^(-6)`
`therefore` No of absorbed molecules of `h_(2)=3xx10^(-6) xx6xx10^(23) rarr 18xx10^(17)`
No of surface sites that is occupied by adsorption of `H_(2) =(10)/(100)xx5.4 xx10(^19) rarr5.4 xx10^(18)`
No of surface sites occupited by one molecule `H_(2) =(5.4 xx10^(18))/(18xx10^(17))=3`
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