Discussion
Pyrolysis gas chromatography is useful technique for characterization of the following paint constituents :
Answer: B
Pyrolysis gas chromatography is useful in characterising the binder of a paint, which is the organic polymer that holds the pigment, because heating the film breaks the polymer into fragments that give a pattern that can be compared. The pigments are mostly inorganic and are studied by other methods, and the solvent evaporates from a dry paint, so neither suits pyrolysis. Lacquer is a type of paint and not one of its constituents. So B is correct.
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