250+ TOP MCQs on Concentration-II and Answers

Chemical Process Calculation Interview Questions and Answers for experienced focuses on “Concentration-II”.

1. What is the molarity of a solution made by diluting 500 mL of a 2.50 M solution to a final volume of 800 mL?
a) 0.5265 M
b) 1.5625 M
c) 2.5689 M
d) 3.4586 M
Answer: b
Clarification: Molarity = Moles / Volume.

2. What is the concentration of 44 grams of CO2 occupying 2 m3 volume?
a) 0.5 mole / m3
b) 0.4 mole / m3
c) 0.3 mole / m3
d) 0.2 mole / m3
Answer: a
Clarification: Concentration = moles / Volume = 1/2.

3. What is mass of the solute that is present in 50 mL of a 0.15 mol/L solution of NaCl?
a) 0.22
b) 0.44
c) 0.66
d) 0.88
Answer: b
Clarification: Concentration = Moles / Volume.

4. What is the concentration of 560 gm H2SO4 solution in 486 mL solution?
a) 11.75 mole / L
b) 1.152 gm / mL
c) Both a and b
d) Only b
Answer: c
Clarification: Concentration = Moles or Mass / Volume.

5. A 1000 ml solution has 0.25 gms of solute. What is the concentration(gm/L)?
a) 0.25
b) 2.5
c) 25
d) 250
Answer: a
Clarification: Concentration = Mass / Volume.

6. Which one is the most concentrated solution?
a) 20 g of NaOH in 100 mL of water
b) 150 g of NaOH in 200 mL of water
c) 180 g of NaOH in 300 mL of water
d) 250 g of NaOH in 600 mL of water
Answer: b
Clarification: Concentration = Mass / Volume.

7. How many gms of NaCl are required to prepare 2.5 L of 0.6 M solution?
a) 22
b) 44
c) 66
d) 88