Chemistry Quiz Questions and Answers

17. The IUPAC name of formaldehyde is
  A.  Ethanol
  B.  Propanal
  C.  Acetone
  D.  Methanol
Answer
Ans: D
Methanol
18. Which has maximum calorific value?
  A.  Fat
  B.  Amino acid
  C.  Carbohydrate
  D.  Protein
Answer
Ans: A
Fat
19. Alum is used as
  A.  A disinfectant
  B.  A purifier for water
  C.  A fertilizer
  D.  An analgesic
Answer
Ans: B
A purifier for water
20. Mildness of shaving cream is enriched by which one of the following?
  A.  Free fatty acid
  B.  Potassium carbonate
  C.  Sodium silicate
  D.  Sodium chloride
Answer
Ans: B
Potassium carbonate
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