Which material is heated to produce red lead?

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Multiple Choice

Which material is heated to produce red lead?

Explanation:
This question tests how red lead primer is made. Red lead is formed when litharge, which is lead(II) oxide, is heated in air. The heat with oxygen converts PbO into lead tetroxide, Pb3O4, yielding the red lead pigment used as a primer. The other items aren’t precursors for red lead: red lead itself is already the product, fisheye refers to a coating defect rather than a material used to produce it, and a special thinner is a solvent, not a pigment precursor.

This question tests how red lead primer is made. Red lead is formed when litharge, which is lead(II) oxide, is heated in air. The heat with oxygen converts PbO into lead tetroxide, Pb3O4, yielding the red lead pigment used as a primer. The other items aren’t precursors for red lead: red lead itself is already the product, fisheye refers to a coating defect rather than a material used to produce it, and a special thinner is a solvent, not a pigment precursor.

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