4. It is defined as the mass of solute present in 100 grams of solution.
A. % by mass B. % by volume C. % by weight D. Molarity
5. What does concentration mean?
A. Amount of solute plus amount of solution
B. Amount of solute minus amount of solution
C. Amount of solute times amount of solution
D. Amount of solute divided by amount of solution
6. Which of the following is a solvent?
A. 10ml patis
B. 10ml vinegar
C. 50ml vinegar
D. 125ml water
7. How many karats is pure gold?
A. 10K
B. 15K
C. 20K
D. 24K
8. How many parts of copper and gold needed to produce 20 Karat (K) jewelry?
A. 20 parts is made up of copper and 4 parts is gold
B. 20 parts is made up of gold and 4 parts is copper
C. 20 parts is made up of gold and 7 parts is copper
D. 20 parts of the jewelry is made up of finest gold suited for the purpose.
9. What is the percentage concentration in the following solution given that 5g sucrose in 90g water?
A. 4 %
B. 5%
C. 6%
D. 7%
10. A beverage contains 5% alcohol which means that:
A. The solution contains 5mL of alcohol in 95mL of water.
B. The solution contains 50mL of alcohol in 50mL of water.
C. The solution contains 500mL of alcohol in 500mL of water,
D. The solution contains 200mL of alcohol in 200mL of water.​