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Science — AI-generated practice question

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

Q1. [1] straightforward initial-understanding
What is the chemical name and formula of washing soda?
Generated by claude-sonnet-4-6 · 2026-06-17 12:35 · grounding rag
Model Answer

Washing soda is Sodium carbonate decahydrate, with the chemical formula Na₂CO₃·10H₂O.

Explanation

The examiner expects both the chemical name and formula in one line. "Decahydrate" is important as it indicates the 10 water molecules of crystallisation. Omitting it may cost marks.

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