CCS CCS Cremation Chemistry and Science 1

Question 1

What is the primary chemical process that occurs during cremation of human remains?

Accepted Answer

Oxidation (combustion)

Answer

Hydrolysis

Answer

Reduction

Answer

Fermentation

Question 2

What is the main mineral component of cremated remains (cremains)?

Accepted Answer

Calcium phosphate / hydroxyapatite [Ca₁₀(PO₄)₆(OH)₂]

Answer

Calcium carbonate (CaCO₃)

Answer

Magnesium oxide (MgO)

Answer

Sodium chloride (NaCl)

Question 3

Why do cremated remains appear white or grayish-white in color?

Accepted Answer

Because calcium oxide and calcium phosphate are naturally white compounds

Answer

Because ash from the combustion of soft tissue coats the bone fragments

Answer

Because the retort chamber walls leave a white residue on the remains

Answer

Because the remains are treated with a whitening agent after processing

Question 4

What gases are primarily released during the combustion of soft tissue in cremation?

Accepted Answer

Carbon dioxide and water vapor

Answer

Nitrogen and hydrogen

Answer

Sulfur dioxide and nitrogen oxide only

Answer

Methane and carbon monoxide only

Question 5

What is the typical weight range of cremated remains from an average adult?

Accepted Answer

3–9 pounds (1.4–4.1 kg)

Answer

1–3 pounds (0.45–1.36 kg)

Answer

10–15 pounds (4.5–6.8 kg)

Answer

Less than 1 pound (under 0.45 kg)

Question 6

Why does the weight of cremated remains vary between individuals?

Accepted Answer

Variations in skeletal size, bone density, and body mass

Answer

Differences in the cremation temperature used for each individual

Answer

The type of container used during cremation affects final weight

Answer

Older retort equipment produces heavier remains than newer models