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Comparing quartz with feldspar as constituents of a weathering granite, the quartz

  • A.becomes clay while the feldspar survives as sand
  • B.dissolves entirely
  • C.weathers at the same rate as the feldspar
  • D.survives as sand while the feldspar becomes clay

Answer: D

Quartz is chemically resistant and its framework offers no easy attack, whereas feldspar hydrolyses readily. The residual soil is therefore quartz grains in a clay matrix, which is the commonest soil profile over granite.

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