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Social Science (087) — AI-generated practice question

AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.

Q1. [1] medium thorough-understanding
[mcq] Molten magma cools slowly deep within the Earth, and hot solutions rich in dissolved minerals are forced into cracks in surrounding rocks. Which of the following correctly describes the type of mineral deposit most likely to result from this process? (A) Placer deposits in river valleys (B) Mineral veins and lodes in igneous and metamorphic rocks (C) Beds of evaporite minerals in arid basins (D) Alluvial deposits in floodplains
  1. A Sedimentary rocks are too soft to contain metallic minerals.
  2. B Molten and gaseous minerals are forced upward through cracks and solidify as they cool, a process associated with igneous and metamorphic activity.
  3. C Sedimentary rocks are always found at the surface, so minerals evaporate before they can solidify.
  4. D Igneous rocks are formed by evaporation, which concentrates minerals into veins.
Generated by claude-sonnet-4-6 · 2026-06-26 13:32 · grounding rag
Model Answer

(B) — Molten and gaseous minerals are forced upward through cracks and solidify as they cool, a process associated with igneous and metamorphic activity.

Source: Mode of Occurrence of Minerals, Chapter 5

Explanation

The passage clearly states that in igneous and metamorphic rocks, minerals in liquid/molten and gaseous forms are forced upward through crevices, cool, and solidify as veins and lodes. Option B directly reflects this explanation. Options A, C, and D describe sedimentary/evaporite or alluvial processes, which are unrelated to the scenario described.

Previous-year CBSE Grade 10 board exam questions, organised by subject and chapter, each with a model answer — free to read and print.