Cu can reduce $A g^{+}$ to metallic Ag but Ag cant reduce $C u^{2 +}$ to metallic Cu. If true enter 1 else 0.

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Solution

$C u + 2 A g^{+} \to 2 A g + C u^{2 +}$
$2 A g + C u^{2 +} \to X (n o r e c t i o n)$
In ECS, Cu is above Ag hence Cu can reduce $A g^{+}$ to metallic Ag.

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