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Science (086) — AI-generated practice question

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

Q1. [1] medium exam-ready
Which of the following correctly represents the order of decreasing reactivity of metals? (A) Na > Ca > Mg > Al > Zn (B) Al > Mg > Ca > Na > Zn (C) Zn > Al > Mg > Na > Ca (D) Ca > Na > Al > Mg > Zn
  1. A Na > Ca > Mg > Al > Zn
  2. B Al > Mg > Ca > Na > Zn
  3. C Zn > Al > Mg > Na > Ca
  4. D Ca > Na > Al > Mg > Zn
Generated by claude-sonnet-4-6 · 2026-06-26 01:04 · grounding rag
Model Answer

(A) Na > Ca > Mg > Al > Zn

Explanation

The reactivity series (Table 3.2, Chapter 3) lists metals in decreasing reactivity: K > Na > Ca > Mg > Al > Zn > Fe > … Option A is the only one that correctly follows this order. Memorise the reactivity series — it is frequently tested in MCQs and short-answer questions.

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