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Which of the following is true for magnesium ?

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It is more electropositive than sodium

It is manufactured by electrolysis of aqueous magnesium chloride

It is strong reducing agent

It resembles, in chemcial properties, with its diagonally placed element boron in 13 group of the periodic table

answer is C.

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Detailed Solution

Electropositivity order

Mg is not extracted by the electrolysis of aqueous MgCl₂
Reason

large MgC{l_2};xrightarrow{{Electrolysis}};M{g^{ + 2}}; + ;2mathop {Cl}limits^ ominus

Oxidation potential order of anion :

large C{l^ ominus }; > ;Omathop Hlimits^ ominus

Similary reduction potential order for cations : H⁺ > Mg⁺²

large M{g^{ + 2}}; + ;2mathop {OH}limits^ - ; to ;Mg{left[ {OH} right]_2}

Products are : Cl₂ , H₂ , Mg(OH)₂
Mg strong reducing agent than H₂
Diagonal relationship exists between the elements of 2^rd period with 3^rd period next group

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