Combustion Analysis Quiz

What is the primary purpose of combustion analysis?

• To determine the melting point of a compound

• To assess the color of a compound

• To find the chemical formula of a compound

• To measure the boiling point of a compound

What is the role of the U-shaped tube in the combustion apparatus?

• To measure temperature

• To ignite the sample

• To absorb water and CO2

• To provide oxygen

Why is oxygen gas used to purge the system before combustion?

• To change the color of the flame

• To ensure complete combustion

• To remove impurities from the sample

• To cool down the apparatus

Which product of combustion contains hydrogen?

• Methane

• Oxygen

• Water

• Carbon dioxide

How is the amount of carbon in the original sample determined?

• By measuring the mass of water

• By analyzing the CO2 produced

• By observing the color change

• By calculating the temperature change

What is the first step in solving the example problem involving a carbon and hydrogen compound?

• Finding the boiling point

• Calculating the temperature

• Converting masses to moles

• Measuring the color change

What is the pseudo formula derived from the example problem?

• C2H4

• C0.166H0.400

• C10H20

• C5H12

What is the empirical formula obtained in the example problem?

• C5H12

• C5H10

• C10H24

• C5H2

What method is used to find the greatest common factor in the empirical formula calculation?

• Trial and error

• Graphical analysis

• Temperature measurement

• Colorimetric analysis

What additional complexity is introduced when a third element is present in the compound?

• The need for a different absorber

• The requirement for more oxygen

• The need for a larger apparatus

• Increased difficulty in calculations