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Differentiate between physical and chemi...

Differentiate between physical and chemical change.

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Physical change - no new substance is formed, generally reversible e.g. : Melting of ice. Chemical change - a new substance is formed, generally irreversible. e.g. : Electrolysis of water.
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ZEN PUBLICATION-CHEMICAL REACTIONS AND EQUATIONS-ZEN ADDITIONAL QUESTIONS SECTION (VERY - SHORT - ANSWER [VSA] TYPE QUESTIONS )
  1. Define a chemical equation.

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  2. Differentiate between physical and chemical change.

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  3. State one difference between physical and chemical change.

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  4. On what basis is a chemical equation belanced ?

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  5. Name and state the law which is kept in mind while we balanced a chemi...

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  6. What change in colour is observed when white silver chloride is left e...

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  7. What happens chemically when quicklime is added to water filled in a b...

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  8. Is burning of a candle wax a physical change or a chemical change ?

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  9. Why do fireflies glow at night

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  10. Name the type of reaction in which energy is abdorbed.

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  11. Grapes hanging on plant do not ferment but after being plucked from th...

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  12. The internal energy of the system increases when the following reactio...

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  13. Classify the following as exothermic and endothermic reactions. Phot...

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  14. Classify the following as exothermic and endothermic reactions. resp...

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  15. Write the type of chemical reaction in the following. reaction betwe...

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  16. Write the type of chemical reaction in the following. rusting of iro...

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  17. Which two gases are evolved when ferrous sulphate is heated ?

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  18. What is a redox reaction ?

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  19. Why do potato - chips manufactures fill the packest of chips with nitr...

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  20. Surface of metals loses their brightness when kept in air for a long t...

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