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Adsorption is the presence of excess concentration of any particular component at the surface of liquid a solid phase as compared to bulk.This is due to presence of residual forces at the surface of body.In the adsorption of hydrogen gas over a sample of charcoal, `1.12cm^3` of `H_2(g)` measured over S.T.P was found to absorb per gram of charcoal.Consider only monolayer adsorption.Density of `H_2` is 0.07gm/cc. In another experiment same 1 gm charcoal adsorbs 100 ml of 0.5M `CH_3COOH` to form monolayer and thereby the molarity of `CH_3COOH` reduces to 0.49. `((3xx47.43)/(4pi))^(1//3)=2.24` `(2.24)^2=5` Number of molecules of hydrogen over 1 gram charcoal are-A. `3.01xx10^(18)`B. `3.01xx10^(19)`C. `3.01xx10^(21)`D. `3.01xx10^(22)` |
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Answer» Correct Answer - B Volume of `H_2` over 1 gm charcoal `=1.12 cm^2` at STP mole of `H_2=1.12/22400=5xx10^(-5)` mole Number of molecules of `H_2=5xx10^(-5)xx6.023xx10^(23)=3.01xx10^19` molecules |
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