Which of these involves the formation of a new chemical substance?
A B C D
evaporation of gasoline mixing salt and pepper dissolving sugar in tea rusting of an iron chain
Question: Which of these involves the formation of a new chemical substance?
(A) evaporation of gasoline
(B) mixing salt and pepper
(C) dissolving sugar in tea
(D) rusting of an iron chain

Answer: (D) rusting of an iron chain
Answer: (B) mixing salt and pepper
Question: Which of these involves the formation of a new chemical substance?
(A) evaporation of gasoline
(B) mixing salt and pepper
(C) dissolving sugar in tea
(D) rusting of an iron chain
Answer: (D) rusting of an iron chain