Question

Choose correct statements regarding iron ore. \[ \begin{aligned} A.&\ \text{Pyrolusite is the best quality of iron ore and contains 72\% iron.} B.&\ \text{Limonite contains 40\% to 60\% iron metal.} C.&\ \text{Most of the haematite ores are found in Dharwad and Cuddapah rock systems of India.} D.&\ \text{Siderite, also known as ``iron carbonate'', is of inferior quality and contains less than 40\% iron.} \end{aligned} \] Choose the correct answer from the options given below:

• A. A, B and C only
• B. B, C and D only
• C. A, C and D only
• D. A, B and D only

Hint:

Major iron ores: \[ \boxed{ \begin{aligned} \text{Magnetite} &\rightarrow 72\% \text{ Iron (Best Quality)}, \text{Haematite} &\rightarrow 60\%\text{--}70\% \text{ Iron}, \text{Limonite} &\rightarrow 40\%\text{--}60\% \text{ Iron}, \text{Siderite} &\rightarrow <40\% \text{ Iron}. \end{aligned} } \] Mnemonic: “Magnetite is Maximum; Pyrolusite is Manganese.”

Answer 1

The Correct Option is B