A) A is more concentrated than B
B) B is more concentrated than A
C) concentration of A is equal to concentration of B
D) it is not possible to compare the concentrations
Correct Answer: A
Solution :
\[\text{1 M }{{\text{H}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4}}}\] means 1 mole \[{{\text{H}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4}}}\] in 1000 cc of solution whereas 1 m means 1 mole \[{{\text{H}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4}}}\]in 1000 g of water (= 1000 cc of water). Total volume of 1 m solution will be > 1000 cc due to extra 1 mole \[{{\text{H}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4}}}\].Hence, number of moles per 1000 cc will be less than 1 mole. Thus, 1 m is less concentrated than 1M.
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