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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] straightforward exam-ready
The process of converting a sulphide ore into its oxide by heating strongly in the presence of excess air is called: (A) Calcination (B) Smelting (C) Roasting (D) Refining
  1. A Calcination
  2. B Smelting
  3. C Roasting
  4. D Refining
Generated by claude-sonnet-4-6 · 2026-06-26 01:04 · grounding rag
Model Answer

(C) Roasting

Roasting is the process of heating a sulphide ore strongly in excess air to convert it into its oxide.

Explanation

Roasting specifically applies to sulphide ores heated in excess air. Calcination (option A) involves heating carbonate/hydroxide ores in limited air. Students often confuse these two — remember: Sulphide → Roasting; Carbonate → Calcination.

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