1. What is added to steel to make it stainless? 2. Which technique is better for obtaining sugar from sugar solution? 3. What type of change is crystallization? 4. Why formation of manure from leaves is a chemical change? 5. Name the metal which is used for galvanizing iron. 6. What is blue vitriol? 7. What happens when baking soda is treated with vinegar? 8. Identify whether the following is physical or chemical change. Turning of Brown colour of the apple after cutting 9. On the basis of following diagram/picture answer the questions given below: What causes the candle flame to get extinguished? 10. Melting of wax is a change where a solid changes to liquid state. Give one more such change which you observe in your surroundings.
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