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When baking soda is mixed with lemon j...

When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. What type of change is it? Explain.

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PSEB-PHYSICAL AND CHEMICAL CHANGES-Exercise
  1. Classify the changes involved in the following processes as physical o...

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  2. State whether the following statements are true and false. In case a s...

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  3. State whether the following statements are true and false. In case a s...

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  4. State whether the following statements are true and false. In case a s...

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  5. State whether the following statements are true and false. In case a s...

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  6. State whether the following statements are true and false. In case a s...

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  7. Fill in the blanks in the following statements:- When carbon dioxide i...

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  8. Fill in the blanks in the following statements:- The chemical name of ...

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  9. Fill in the blanks in the following statements:- Two methods by which ...

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  10. Fill in the blanks in the following statements:- Changes in which only...

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  11. Fill in the blanks in the following statements:- Changes in which new ...

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  12. When baking soda is mixed with lemon juice, bubbles are formed with ...

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  13. When a candle burns, both physical and chemical changes take place. Id...

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  14. How would you show that setting of curd is a chemical change?

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  15. Explain why burning of wood and cutting it into small pieces are consi...

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  16. Describe how crystals of copper sulphate are prepared.

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  17. Explain how painting of an iron gate prevents it from rusting.

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  18. Explain why rusting of iron objects is faster in coastal areas than in...

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  19. The gas we use in the kitchen is called liquified petroleum gas (LPG)....

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  20. Anaerobic bacteria digest animal waste and produce biogas (Change-A). ...

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