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Match the columns.
Column – I Column – II
(A) Estimation of water hardness. (p) ${[A g {(C N)}_{2}]}^{-}$
(B) Extraction of silver. q) $[N i {(C O)}_{4}]$
(C) Hydrogenation of alkenes. (r) $N a_{2} E D T A$
(D) Photography (s) $[{(P h_{3} P)}_{3} R h C l]$
(E) Purification of Nickel. (t) ${[A g {(S_{2} O_{3})}_{2}]}^{3 -}$

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$A - (r); B - (p); C - (s); D - (q); E - (t)$

$A - (r); B - (p); C - (s); D - (t); E - (q)$

$A - (p); B - (r); C - (s); D - (t); E - (q)$

$A - (r); B - (s); C - (p); D - (t); E - (q)$

answer is A.

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Detailed Solution

Estimation of water hardness.	$N a_{2} E D T A$
Extraction of silver.	${[A g {(C N)}_{2}]}^{-}$
Hydrogenation of alkenes.	$[{(P h_{3} P)}_{3} R h C l]$
Photography	${[A g {(S_{2} O_{3})}_{2}]}^{3 -}$
Purification of Nickel.	$[N i {(C O)}_{4}]$

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