AP EAMCET Medical 2018 Shift 1 Paper

Identify the correct statements from the following.
i. In [CoCl(NH3)5]2+ , the lewis acid is Co3+
ii. An example for heteroleptic complex is [CoCl(NH3)6]3+
iii. The hybridisation of Mil in [MnBr4]2− is dsp2
iv. In [Ni(CO)4] the metal-carbon bond possesses σ and π character.