which of the following comparisons is incorrect? a. Talc is softer than gypsum. b. Feldspar is harder than calcite. c. Quartz is softer than corundum. d. Apatite is harder than topaz.
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Home » Chemistry » which of the following comparisons is incorrect? a. Talc is softer than gypsum. b. Feldspar is harder than calcite. c. Quartz is softer than corundum. d. Apatite is harder than topaz.