20 mL of alcohol is mixed with water and the total volume is made 100 mL. What is the volume percentage?
Answer and explanation
Correct answer: 20 percent
Volume percentage is the volume of solute divided by the final volume of solution, multiplied by 100: volume percentage = (Vsolute/Vsolution) × 100. Here, (20 mL/100 mL) × 100 = 20%. Therefore, option A is correct. The water volume is not used as the denominator, and the final total volume is already supplied, so 80%, 25% and 5% are incorrect.
Frequently asked questions
What is the correct answer to this question?
20 percent
Why is this the correct answer?
Volume percentage is the volume of solute divided by the final volume of solution, multiplied by 100: volume percentage = (Vsolute/Vsolution) × 100. Here, (20 mL/100 mL) × 100 = 20%. Therefore, option A is correct. The water volume is not used as the denominator, and the final total volume is already supplied, so 80%, 25% and 5% are incorrect.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.
