Question

1. the chemical weathering of feldspar produces ______.

○ quartz grains
○ clay minerals
○ calcium carbonate
○ iron oxide

Explanation:

Chemical weathering of feldspar involves hydrolysis reactions. Feldspar minerals (like potassium feldspar, plagioclase) react with water and acids in the environment. Through hydrolysis, feldspar breaks down and forms clay minerals (such as kaolinite). Quartz is resistant to chemical weathering, so it doesn't form from feldspar weathering. Calcium carbonate formation is more related to carbonate minerals or biological processes, not feldspar weathering. Iron oxide forms from oxidation of iron - bearing minerals, not typical of feldspar weathering.

Answer:

B. clay minerals