Question

49. What is the molarity of NaOH solution if 250 mL of it contains 1 mg of NaOH?
(1) 10-1 M
(2) 10-2 M
(3) 10-4 M
(4) 10-3 M​

Answer 1

Answer: 3

Explanation:

Molarity = moles of solute / V of solution in litre

               = 10-3/40  / 250/1000

              = 0.1*10-3

             = 10-4 M

Answer 2

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