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A piece of cut apple becomes brown. Why ...

A piece of cut apple becomes brown. Why ? Can you prevent it by a simple method ?

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Apple turns brown when cut since the surface is exposed to air and undergoes oxidaiton . It can be prevanted by dipping sliced apples in lemon juice. Lemon juice is an antioxidant which takes in all the available oxygen and prevents it from reaching the apple.s tissues.
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SURA PUBLICATION-BASIC CONCEPTS OF CHEMISTRY AND CHEMICAL CALCULATIONS-REDOX REACTION ACTIVITY
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  2. Place an iron piece in amosit atomsphere and observe it after two days...

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  3. Calculate the oxidaiton number of underlined atoms of the fopllowing :...

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  4. Calculate the oxidaiton number of underlined atoms of the fopllowing :...

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  5. Calculate the oxidaiton number of underlined atoms of the following : ...

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  6. Calculate the oxidaiton number of underlined atoms of the fopllowing :...

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  7. Calculate the oxidaiton number of underlined atoms of the fopllowing :...

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  8. Calculate the oxidaiton number of underlined atoms of the fopllowing :...

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  10. The approximate production of Na2CO3 per month is 424xx10^(6)g while t...

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  11. Find the molecular mass of FeSO4 7H(2)O.

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  12. The density of CO(2)=1.977kmg^(-3) at STP. Calculate the molecular mas...

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  13. How many moles of glucose are present in 720 g of glucose ?

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  14. Calculate the weight of 0.2 mole of sodium carbonate.

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  15. Calculate the equivalent mass of bicarbonate ion.

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  16. Calculate the equivalent mass of barium hydroxide.

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  17. Boric acid, H3BO3 is a mild antiseptic and is often used as an eye was...

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  18. (i) K(2)Cr(2)O(7)+KI+H(2)SO(4)to K(2)SO(4)+Cr(2)(SO4)3+I(2)+H(2)O.

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  19. (ii) KMnO(4)+Na(2)SO(3)to MnO(2)+Na(2)SO(4)+KOH (Alkaline medium).

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  20. (iii) K(2)Cr(2)O(7)+KCI+H(2)SO(4)to KHSO(4)+CrO(2)CI(2)+H(2)O.

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