A complex typically absorbs at around 600 nm

CHEMISTRY · Single correct · A Level · Chemistry · Transition metals and their chemistry · Transition metals and their chemistry

Problem

[M(H_2O)_6]^{2+}

complex typically absorbs at around 600 nm. It is allowed to react with ammonia to form a new complex

[M(NH_3)_6]^{2+}

that should have absorption at : (1) 800 nm (2) 580 nm (3) 620 nm (4) 320 nm