1. How many parks of copper and gold needed to produce 18 Karat (K) jewelry?

A. 18 parts is made up of copper and 6 parts is hold

B. 18 parts is made up gold and 6 parts is copper

C. 18 parts is made up of gold and 9 parts is copper

D. 18 parts of jewelry is made up of finest gold suited for the purpose.


2. What is the percentage concentration in the following solution given that 5g sucrose in 90g water?

A. 4 % B. 5 %

C. 6% D. 7%


3. A beverage contains 3% alcohol which means that:

A. The solution contains 3mL of alcohol 97mL of water

B. The solution contains 30mL of alcohol in 70mL of water.

C. The solution contains 300mL of alcohol in 700mL of water

D. The solution contains 100mL of alcohol in 100mL of water.


4. Sterling silver contains 95% silver. If a necklace made of sterling silver weight 25g what is the mass of silver dissolved in the necklace?

A. 1.6g B. 6,2g

C. 9.0g D. 14.25g


5. What is the percent by volume of isopropanol in a 90ml solution that contains 25mL isopropanol?

A. 26.8% isopropanol B. 26.9% isopropanol

C. 27.8% isopropanol D. 27.9% isopropanol


6. What is the volume of a 20% methyl solution that contains 1.5mL of menthyl?

A. 6 mL of methyl B. 4 mL of methyl

C. 5 mL of methyl D. 3 mL of methyl


7. What is the percent by mass concentration of a solution that contains 30.0g of sugar dissolved in 150g of water?

A. 16.5% B. 16.7%

C. 17.6% D. 17.7%


8. A genuine sterling silver items is 92.5% silver by mass. This means that:

A. 92.5 g is silver and 7.5g in another metal (usually copper)

B. 0.5g is silver and 92.5g is another metal (usually copper)

C. 46.25g is silver and 46.25g is another metal (usually copper)

D. 92.5g of the jewelry is made up of pure silver