Classification (ores and metals): Three pairs match an ore to the metal extracted; one pair names an alloy/material and a constituent metal, not an ore–metal relation. Identify the odd pair.

Introduction / Context:Science-based classification frequently tests recognition of ores and the metals extracted from them. Three options list ore→metal pairs. One option lists an alloy/material (solder) and a component metal, which is not an ore→metal relation. The objective is to find that non-ore pair.

Given Data / Assumptions:

• Hematite (misspelled “Hae matite”) → iron ore.
• Bauxite → aluminium ore.
• Malachite → copper ore.
• Solder → typically a tin-based alloy (often tin + lead or tin + other metals), not an ore.

Concept / Approach:Classify each left term as ore vs non-ore. If non-ore, check whether the pair is alloy→constituent rather than ore→extracted metal, making it the odd pair.

Step-by-Step Solution:

Verification / Alternative check:Ask whether the pair implies “metal is extracted from X via metallurgy.” True for ores; false for alloy→constituent.

Why Other Options Are Wrong:

Common Pitfalls:Confusing “most of solder is tin” with “solder is an ore of tin.” Composition is not the same as being an ore.

Final Answer:Solder : Tin