Testing Gold Composition and Purity

The video tutorial explains how to determine if a piece of metal is solid gold using three tests: color, thermoconductivity, and particle analysis. The color test uses a spectrometer to measure the yellow component, indicating if the surface is consistent with 14 karat gold. The thermoconductivity test confirms the gold content on both sides of the trophy. Finally, the particle test involves scraping a sample to analyze its composition, confirming the trophy is 99.9% gold.

What is the primary objective of the video tutorial?

• To learn how to make gold jewelry

• To determine if a piece of metal is solid gold

• To understand the history of gold mining

• To explore different types of metals

Which of the following is NOT a test mentioned for verifying solid gold?

• Thermoconductivity test

• Color test

• Particle test

• Magnetic test

What device is used in the color test to measure the color of the trophy?

• Thermometer

• Spectrometer

• Barometer

• Colorimeter

What yellow component value indicates that the trophy is not plated?

• 22.4

• 30

• 21.6

• 40

What does the conductivity test confirm about the trophy?

• It is hollow

• It is 24 karat gold

• It is 14 karat gold

• It is made of silver

What is the purpose of the particle test?

• To check the surface finish

• To determine the age of the trophy

• To analyze the individual particles of the metal

• To measure the weight of the trophy

Where is the sample for the particle test taken from?

• The top of the trophy

• The base of the trophy

• A less visible place on the trophy

• The most visible part of the trophy

What metals were detected in the particle test besides gold?

• Platinum and palladium

• Iron and nickel

• Silver and copper

• Aluminum and zinc

What is the final conclusion about the trophy's composition?

• It is made of 24 karat gold

• It is made of 14 karat gold

• It is made of 10 karat gold

• It is made of 18 karat gold

What is the estimated purity percentage of the gold in the trophy?

• 95%

• 99.9%

• 85%

• 90%