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Oil and fat containing food items are fl...

Oil and fat containing food items are flushed with nitrogen. Why ?

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Nitrogen being a less reactive element the oxygen prevents the oxidation of oil and fats in food.
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(a) Write one equation each for decomposition reaction when energy is supplied in the form of : (i) heat , (ii) light. (b) Account for the following : (i) Paint is applied on iron articles. (ii) Oil and fat containing food items are flushed with nitrogen . (iii) When an iron nail kept in copper sulphate solution, blue colour of the solution fades and iron nail becomes brownish .

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Why do potato - chips manufactures fill the packest of chips with nitrogen gas ?

Define rancidity. To prevent rancidity of food containing oils and fats, some substances are added to them. What are these substances called ? some other methods to prevent rancidity.

When food containing fat or oil is not used and left for a long time, their smell and state changes. Name the process which is responsible for this change . List two methods to prevent or slow down the above change.

Name two biologically important compounds that contain both oxygen and nitrogen .

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ZEN PUBLICATION-CHEMICAL REACTIONS AND EQUATIONS-QUESTION SECTION (TEXTUAL EXERCISE )
  1. Write the balanced chemical equation for the following reactions. Al...

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  2. Write the balanced chemical equation for the following reactions. Ba...

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  3. Write the balanced chemical equation for the following and identify th...

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  4. Write the balanced chemical equation for the following and identify th...

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  5. Write the balanced chemical equation for the following and identify th...

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  6. Write the balanced chemical equation for the following and identify th...

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  7. What does one mean by exothermic and endothermic reactions ? Give exam...

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  8. Why is respiration considered an exothermic reaction ? Explain.

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  9. Why are decomposition reactions called the opposite of combination rea...

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  10. Write one equation for decomposition reactions where energy is supplie...

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  11. What is the difference between displacement and double displacement re...

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  12. In the refining of silver, the recovery of silver from silver nitrate ...

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  13. What do you mean by a precipitation reaction ? Explain by giving examp...

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  14. Explain the following in terms of gain or loss of oxygen with two exam...

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  15. Explain the following in terms of gain or loss of oxygen with two exam...

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  16. A shiny brown -coloured elemnt 'X' on heating in air becomes black in ...

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  17. Why do we apply paint on iron articles ?

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  18. Oil and fat containing food items are flushed with nitrogen. Why ?

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  19. Explain the following terms with one example each. corrosion.

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  20. Explain the following terms with one example each. rancidity.

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