KVPY SX SB Exam 2013 Question Paper

Question : 107 of 120

Marks: +1, -0

Aqueous solution of a metallic nitrate X reacts with

NH_4OH

to form Y which dissolves in excess

NH_4O

. The resulting complex is reduced by acetaldehyde to deposit the metal. X and Y, respectively, are

Solution:

\AgNO_3+\NH_4\OH→

\AgOH {–––––––– ▶}↖{\NH_4\OH}↙{(\excess)}[\Ag(\NH_3)]^{+}

Tollen' s reagent + R - CHO → R - COOH

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