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Place an iron piece in amosit atomsphere...

Place an iron piece in amosit atomsphere and observe it after two days. Is there and deposition of new substance ? Why does it happen ? What is this phenomenon called ?

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When iron is exposed to mosit air, the iron reacts with oxygen in the presence of moisture to from a reddish - brown chemical compound, iron - oxide. This phenonaenon is called rusting. A new substance Iron (III) oxide is formed. `4Fe(OH)_2+O_(2)+x H_(2)Oto Fe_(2)O_(3)(x+4)H_(2)O` .
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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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  6. Calculate the oxidaiton number of underlined atoms of the fopllowing :...

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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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  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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