Which one of the following is not correctly matched

A. Feldspars : Potassium silicates

B. Micas : Iron and aluminium silicates

C. Gibbsite : Hydrous oxides of aluminium

D. Geothite : Hydrous iron oxides

Answer: Option B

Solution(By Examveda Team)

Feldspar is a group of rock-forming aluminum tectosilicate minerals, containing sodium, calcium, potassium, or barium.

Micas are a group of phyllosilicate minerals, not iron and aluminium silicates.

Gibbsite is a hydrous oxide of aluminium. it is an important ore of aluminium.

Goethite is hydrous iron oxide. It is a widespread soil mineral and a major component of many ores, sediments, and soils and it is one of the most thermodynamically stable iron oxides.