Metals and Non-metals — Prelims Strategy

Prelims Strategy

To ace Prelims questions on Metals and Non-metals, adopt a multi-pronged approach. First, master the basics: clearly differentiate between metals, non-metals, and metalloids based on their physical and chemical properties.

Create mental tables or flashcards for quick recall. Second, focus on exceptions: remember elements like mercury (liquid metal) or graphite (non-metal conductor), as UPSC loves to test these. Third, understand reactivity: memorize the reactivity series and its implications for displacement reactions and extraction methods.

Fourth, learn key alloys and their uses: steel, brass, bronze, duralumin are frequently tested. Fifth, pay attention to environmental aspects: questions on corrosion prevention (galvanization, cathodic protection) and the environmental impact of mining are increasingly common.

Finally, practice elimination: for MCQs, even if you don't know the direct answer, eliminate obviously incorrect options based on fundamental principles. A 6-point checklist: 1. Identify the core concept (property, reaction, extraction).

2. Recall exceptions. 3. Apply reactivity series. 4. Check for common alloy compositions. 5. Consider environmental/industrial implications. 6. Use elimination for tricky options.