Question

Match the minerals in Group-I with the corresponding cleavage types in Group-II.

	Group-I		Group-II
P	Diopside	1	Cubic
Q	Galena	2	Octahedral
R	Calcite	3	Prismatic
S	Fluorite	4	Rhombohedral

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

Hint:

- Pyroxenes (e.g., Diopside) → Prismatic cleavage.
- Galena → Perfect cubic cleavage.
- Calcite → Rhombohedral cleavage.
- Fluorite → Octahedral cleavage.

Answer 1

The Correct Option is C

Step 1: Recall cleavage properties of each mineral.
- Diopside (pyroxene): Shows two cleavages at nearly right angles, known as prismatic cleavage. → (3) Prismatic.
- Galena (PbS): Belongs to the cubic system, shows cubic cleavage (perfect in three directions at right angles). → (1) Cubic. \(>\) Correction: Actually Galena is best known for its perfect cubic cleavage. However, option (A) gives Galena → (2). Let's carefully re-check. Step 2: Verify carefully each option.
- Galena → Cubic (1). - Calcite → Rhombohedral (4). - Fluorite → Octahedral (2). - Diopside → Prismatic (3). So the correct matching should be: \[ P \to 3,\ Q \to 1,\ R \to 4,\ S \to 2 \] Step 3: Match with given options.
This corresponds to option (C). Final Answer: \[ \boxed{\text{(C) P-3, Q-1, R-4, S-2}} \]