How is Raney nickel,which is used as a cataly | vedclass

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Question

(B) Raney nickel is a fine-grained solid catalyst composed of nickel derived from a nickel-aluminum alloy. It is prepared by treating the nickel-alumi

Vedclass · Accepted Answer

By treating nickel-aluminum alloy with dilute $NaOH$

Vedclass · Answer

(B) Raney nickel is a fine-grained solid catalyst composed of nickel derived from a nickel-aluminum alloy. It is prepared by treating the nickel-aluminum alloy with a concentrated aqueous solution of sodium hydroxide $(NaOH)$. The aluminum dissolves in the $NaOH$ solution,leaving behind a highly porous,finely divided nickel residue known as Raney nickel. The reaction is: $2Al + 2NaOH + 6H_2O \rightarrow 2Na[Al(OH)_4] + 3H_2$.

List-$I$ (Processes/Reactions)	List-$II$ (Catalyst)
$A. 2 SO_{2(g)} + O_{2(g)} \rightarrow 2 SO_{3(g)}$	$I. V_{2}O_{5}$
$B. 4 NH_{3(g)} + 5 O_{2(g)} \rightarrow 4 NO_{(g)} + 6 H_{2}O_{(g)}$	$II. Pt_{(s)}-Rh_{(s)}$
$C. N_{2(g)} + 3 H_{2(g)} \rightarrow 2 NH_{3(g)}$	$III. Fe_{(s)}$
$D. \text{Vegetable oil}(l) + H_{2} \rightarrow \text{Vegetable ghee}(s)$	$IV. Ni_{(s)}$

How is Raney nickel,which is used as a catalyst,prepared?

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