Purity PreLess

What is the purity of 18 carat gold?

• 50%

• 75%

• 80%

• 90%

What percentage of pure gold is in a 14-carat gold?

• 50%

• 60%

• 80%

• 70%

How many parts of the gold is made up of silver or copper in a 14-carat gold?

• 9 parts

• 8 parts

• 7 parts

• 6 parts

How many parts of the gold is made up of gold in a 14-carat gold?

• 6 parts

• 8 parts

• 9 parts

• 7 parts

What percentage of silver is in silver marked 875?

• 80%

• 85%

• 75%

• 90%

How many parts of the silver is made up of copper in silver marked 875?

• 100 parts

• 200 parts

• 300 parts

• 400 parts

How many parts of the silver is made up of silver in silver marked 875?

• 600 parts

• 900 parts

• 700 parts

• 800 parts

What are diamonds made from?

• Carbon, Nitrogen, Hydrogen

• Carbon, Oxygen, Nitrogen

• Gold, Silver, Platinum

• Iron, Nickel, Lead

What is the color of pure diamonds?

• Yellow

• Blue

• Green

• Colorless

How to obtain sodium chloride from seawater?

• Boiling

• Freezing

• Evaporating

• Condensing