Q. Which of the following are carbonate minerals?
  1. Calcite
  2. Dolomite
  3. Siderite
Select the correct option from the codes given below:

Answer: 1, 2 & 3
Notes: Calcite (CaCO₃), dolomite (CaMg(CO₃)₂), and siderite (FeCO₃) are all classified as carbonate minerals, containing the carbonate ion (CO₃₂−) as a fundamental structural unit. Carbonate minerals are widely distributed in the Earth´s crust and play significant roles in geological and industrial processes.