Question

Among K,Ca,Fe and Zn the element which can form more then one binary compound with chlorine is 1.Fe 2.Zn 3.K4.Ca

Answer 1

Hey here is your answer..

I think 1. Fe ( iron) is the correct answer..
A binary compound is one made of up two different elements. This can be one of each element such as CuCl or FeO. These can also be several of each element such as Fe2O3 or SnBr4.

Hope thus answer help you.

Answer 2

1.)Fe

Metals which have variable oxidation number can form more than one type of binary compound like Fe shows the oxidation state +2 and +3. Hence it forms two types of binary compounds. e.g., FeCl3, FeCl3