Match List I with List II

Choose the correct answer from the options given below:

A-III, B-I, C-II, D-IV

The correct answer is Option (3) → A-III, B-I, C-II, D-IV.

Let us analyze each mineral from List I in detail, exploring their compositions, properties, and the metals they yield:

A. Carnallite : III. Magnesium

Chemical Formula: \( \text{KCl} \cdot \text{MgCl}_2 \cdot 6\text{H}_2\text{O} \)

Composition: Carnallite is a hydrated potassium magnesium chloride. It is typically found in evaporite deposits, which form through the evaporation of saline water.

Main Metal: Magnesium (Mg) and Potassium (K)

Usage: Carnallite is primarily used as a source of potassium (as KCl) and magnesium. Magnesium derived from carnallite is essential in the production of alloys and as a nutrient in fertilizers

B. Calamine: I. Zinc

Chemical Formula: \( \text{ZnCO}_3 \) (main form) or \( \text{Zn}_2\text{SiO}_4 \cdot \text{H}_2\text{O} \) (also known as Smithsonite or Zinc silicate)

Composition: Calamine can refer to both zinc carbonate and zinc silicate, but it is commonly associated with zinc oxide minerals.

Main Metal: Zinc (Zn)

Usage: Calamine is often used as a source of zinc for metallurgical processes and in the production of ointments due to its soothing properties for skin irritations.

C. Siderite : II. Iron

Chemical Formula: \( \text{FeCO}_3 \)

Composition: Siderite is a mineral composed primarily of iron(II) carbonate. It often occurs in sedimentary deposits and can form from the alteration of iron-bearing minerals

Main Metal: Iron (Fe)

Usage: Siderite is an important ore of iron and is used in the production of iron and steel. It can also be used in various chemical applications.

D. Malachite: IV. Copper

Chemical Formula: \( \text{Cu}_2(\text{CO}_3)(\text{OH})_2 \)

Composition: Malachite is a green mineral, composed of copper carbonate hydroxide. It often forms in the oxidation zones of copper deposits.

Main Metal: Copper (Cu)

Usage: Malachite is primarily used as a copper ore and is also valued for its use as a gemstone and in decorative arts.

Thus, the correct option from the choices provided is: A-III, B-I, C-II, D-IV.