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1 g of activated charcoal has a surface ...

1 g of activated charcoal has a surface area of `10^3 m^2`. One molecule of `NH_3` having diameter 0.3 nm is supposed to be adsorbed on complete surface of charcoal forming unilayer adsorption. The activated charcoal is brought in contact with 100mL of 2 M `NH_3` solution
Answer the following questions based on above passage:
The molarity of `NH_3` left after the adsorption on charcoal surface is

A

(A)1.77

B

(B)1.150

C

(C)1.125

D

(D)1.12

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The correct Answer is:
A
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