Physical Chemistry MCQ with Answers

Physical Chemistry MCQ with Answers

21) A solution is prepared by mixing 10 mL of ethanol with 120 mL of methanol. What is the volume percentage of ethanol?

Answer is:

0.077

Explanation:

Volume percentage of ethanol = (volume of ethanol⁄volume of solution) x 100

22) What is the weight by volume percentage of a solution in which 7.5 gm of KCl is dissolved in 100 mL of the solution?

Answer is:

0.075

Explanation:

7.5% of KCl (w⁄V) : 7.5 gm KCl present in 100 mL of solution

23) 0.56 gm KOH is present in 100 mL of the solution. What is the normality?

Answer is:

0.1N

Explanation:

Normality = (w⁄GEM) x (1000⁄V(mL))

24) Find the number of milli-equivalent of H₂SO₄ present in 50 mL of N⁄20 H₂SO₄:

Answer is:

2.5

Explanation:

meq = N x V(mL)

25) To prepare 600 mL of 2N solution of NH₄OH, what volume of 10N NH₄OH is required?

Answer is:

120 mL

Explanation:

N₁V₁ = N₂V₂

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