The major product in the above reaction is :

Indicate the complex/complex ion which did not show any geometrical isomerism :

The sol given below with negatively charged colloidal particles is :

Given below are two statements :

Statement I : Sphalerite is a sulphide or of zinc and copper glance is a sulphide ore of copper.

Statement II : It is possible to separate two sulphide ores by adjusting proportion of oil to water or by using 'depressants' in a forth flotation method.

Choose the most appropriate answer from the options given below :