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Grapes hanging on plant do not ferment b...

Grapes hanging on plant do not ferment but after being plucked from the plant they can be fermented. Under what conditions do these grapes ferment ? Is it a chemical or physical change ?

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Grapes ferment in anaerobic conditions in the presence of sugars and it is a chemical change.
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ZEN PUBLICATION-CHEMICAL REACTIONS AND EQUATIONS-ZEN ADDITIONAL QUESTIONS SECTION (VERY - SHORT - ANSWER [VSA] TYPE QUESTIONS )
  1. Why do fireflies glow at night

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

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

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

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

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

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

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

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

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  10. What is a redox reaction ?

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

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

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  13. Give two wxamples from daily where redox reactions are taking place.

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  14. Which one is a chemical change - rusting or iron or melting of ice ?

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  15. Hydrogen being a highly inflammable gas oxygen being a supporter of co...

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  16. Write balanced chemical equation FeSO(4)(s)overset("heat")(to)Fe(2)O...

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  17. Write the chemical equation for reaction when lead nitrate and potassi...

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  18. AgNO(3)+NaCl to AgCldarr+NaNO(3) FeS+H(2)SO(4)toFeSO(4)+H(2)Suarr ...

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  19. What is neutralisation reaction?

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  20. An iron ring is to be coated with copper. How can we do this without u...

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