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Match each solution in Column I with its correct molarity in Column II. Column I: (A) 20 volume H2O2; (B) 24.5% w/v H2SO4; (C) Pure water; (D) 5% w/w NaOH with solution density 1.2 g/mL. Column II: (P) 2.5 M; (Q) 1.76 M; (R) 1.5 M; (S) 55.5 M.

1. (A)-(Q), (B)-(P), (C)-(S), (D)-(R)
2. (A)-(P), (B)-(Q), (C)-(S), (D)-(R)
3. (A)-(R), (B)-(Q), (C)-(S), (D)-(P)
4. (A)-(P), (B)-(R), (C)-(Q), (D)-(S)

Correct answer: (A)-(Q), (B)-(P), (C)-(S), (D)-(R)

Solution

20 vol H2O2 = 20/11.2 = 1.79 ~ 1.76 M (Q); 24.5% w/v H2SO4 = 2.5 M (P); pure water = 1000/18 = 55.5 M (S); 5% w/w NaOH at 1.2 g/mL = (0.05*1200)/40 = 1.5 M (R).

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