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The sta1ements which refer to "reduction...

The sta1ements which refer to "reduction" are:
i. Removal of oxygen
ii. Addition of electropositive element
iii. Removal of hydrogen
iv. Loss of electrons
v. Addition of electronegative element
vi. Gain of electrons
vii. Oxidation number of the element increases.

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The correct Answer is:
3
Statements i, ii, and vi represent reduction.
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