Question

Match the following rock types (GROUP I) with their respective chemical compositions (GROUP II) from the given options. 

• A. P – III, Q – II, R – IV, S – I
• B. P – II, Q – III, R – I, S – IV
• C. P – III, Q – I, R – IV, S – II
• D. P – III, Q – I, R – II, S – IV

Hint:

When matching rocks to their compositions, remember that: - Siliciclastic rocks are primarily made of sand or other particles (e.g., sandstone). - Carbonate rocks like limestone are made of minerals like calcite. - Chemical rocks like rock salt are composed of single minerals (e.g., halite). - Fissile rocks like shale have a laminated structure.

Answer 1

The Correct Option is C

Let's break down the correct matching:
- P – III: Sandstone is a siliciclastic rock, primarily composed of sand-sized particles. This matches with option (III) which describes a siliciclastic rock formed mainly of sand.
- Q – I: Limestone is a non-clastic carbonate rock, primarily composed of calcite. This matches with option (I) which describes a non-clastic carbonate rock consisting mainly of the mineral calcite.
- R – IV: Shale is a fissile rock with a laminated structure, formed by the consolidation of clay or mud. This corresponds with option (IV).
- S – II: Rock salt is a non-clastic chemical rock composed primarily of halite (NaCl). This corresponds to option (II) describing a non-clastic chemical rock composed of halite.
Thus, the correct matching is option (C).