GATE CY 2019 Question Paper (02-Feb-2019) (Shift 1)

In the following reaction sequence, the products P and Q are

The major product formed in the following reaction is

The rate of the following redox reaction is slowest when X is

[Co${}^{III}$ (NH₃)₅X]${}^{3+/2+}$ + [Cr${}^{II}$ (H₂O)₆]²⁺ → [Co${}^{II}$ (NH₃)₅(H₂O)]²⁺ + [Cr${}^{III}$ (H₂O)₅X]${}^{3+/2+}$

A complex is composed of one chromium ion, three bromides and six water molecules. Upon addition of excess AgNO₃, 1.0 g aqueous solution of the complex gave 0.94 g of AgBr. The molecular formula of the complex is

(Atomic weight: Cr = 52, Br = 80, Ag = 108, O = 16 and H = 1)

The number of possible optically active isomer(s) for the following complex is _______.



en = ethylenediamine