1.

Reduction is a process wich involves (i) decrease in the oxidation number of one fo the atoms (ii) loss of oxygen or an electronegative element (iii) addition of hydrogen or an electropositive element . (iv) gain of electrons .A. (i), (ii), (iiii), (iv)B. (i), (ii) (iii)C. (ii), (iii), (iv)D. (i), (iv)

Answer» Correct Answer - A
Reduction is a decrease in oxidation number and correspons to a gain, or apparent gain, of electrons (electronation). In biological system, reduction often corresponds to the addition of hydrogen to molecules or polyatomic ions and oxidation often corresponds to the removal of hydrogen.


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