Question

Match the minerals in Group I with the corresponding elements in Group II.

Group-I	Group-II
P. Smithsonite	1. Lead
Q. Azurite	2. Iron
R. Crocite	3. Zinc
S. Marcasite	4. Copper

• A. P-4; Q-1; R-2; S-3
• B. P-2; Q-4; R-1; S-3
• C. P-3; Q-1; R-4; S-2
• D. P-3; Q-4; R-1; S-2

Hint:

Recall the chemical formula of each mineral and note which metal it carries: ZnCO3, Cu3(CO3)2(OH)2, PbCrO4, FeS2.

Answer 1

The Correct Option is D

Step 1: Identify the chemical formula behind each mineral name.
Each mineral in Group I is a well known ore or carbonate/sulphide mineral, and matching it means recalling which metal sits in its formula.

Step 2: Identify smithsonite (P).
Smithsonite is zinc carbonate, \(ZnCO_3\). Its metal is zinc, so P matches with 3, zinc.

Step 3: Identify azurite (Q).
Azurite is a basic copper carbonate, \(Cu_3(CO_3)_2(OH)_2\), well known for its deep blue colour. Its metal is copper, so Q matches with 4, copper.

Step 4: Identify crocoite (R).
Crocoite is lead chromate, \(PbCrO_4\). Its metal is lead, so R matches with 1, lead.

Step 5: Identify marcasite (S).
Marcasite is an iron sulphide, \(FeS_2\), a polymorph of pyrite with the same formula but different crystal structure. Its metal is iron, so S matches with 2, iron.

Step 6: Assemble the full match and compare with the options.
Putting it together gives P-3, Q-4, R-1, S-2, which is exactly option (D).
\[ \boxed{\text{P-3; Q-4; R-1; S-2}} \]