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Why are eatables preferably packed in al...

Why are eatables preferably packed in aluminium foils ?

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Aluminium oxide `(Al_(2)O_(3))` is formed on the surface of metal. It stops any further reaction of the metal with air (oxygen) and water. The eatables donot get spoiled.
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DINESH PUBLICATION-CHEMICAL REACTIONS AND EQUATIONS -Very Short Answer Questions
  1. Identify the substance oxidised and reduced in the reaction : CuO(s)...

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  2. How will you know whether a sample of cheese has become rancid or not ...

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  3. Why are eatables preferably packed in aluminium foils ?

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  4. What happens chemically when quick lime is added to water ?

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  5. Give an example of exothermic reaction.

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  6. Give an example of endothermic reaction.

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  7. Name the gas that can be used for the storage of fresh sample of chips...

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  8. Name the type of reaction N(2)(g) + 3H(2)(g) to 2NH(3)(g)

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  9. Give an example of a double displacement reaction (only) reaction with...

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  10. In the reaction MnO(2) + 4HCl to MnCl(2) + 2H(2)O + Cl(2), identify wh...

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  11. Name two salts that are used in black and white photography.

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  12. State the chemical change that takes place when lime stone is heated

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  13. Write a balanced equation for a chemical reaction that can be characte...

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  14. Name the law which requires the balancing of chemical equation.

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  15. What is meant by thermal decomposition reaction ? Explain with an exam...

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  16. {:(X + Y SO(4) to X SO(4) + Y),(Y + X SO(4) to "No reaction"):} Of t...

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  17. Write a complete balanced chemical equation for the following reaction...

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  18. On heating copper powder in air, the surface of copper powder becomes ...

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  19. Write the essential condition for the following reaction to take place...

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  20. Write the chemical formula of rust.

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