When cobalt(II) chloride is dissolved in water, a pink solution A is formed. When ammonia is passed through the solution, orange red solution is obtained. Then the sum of the coordination number and the oxidation state of central metal in the yellow coloured solution is :

When cobalt(II) chloride is dissolved in water, a pink solution A is f

1.	When cobalt(II) chloride is dissolved in water, a pink solution A is formed. When ammonia is passed through the solution, orange red solution is obtained. Then the sum of the coordination number and the oxidation state of central metal in the yellow coloured solution is :
Answer» When cobalt $(I I)$ chloride is dissolved in water, a pink solution A is formed. When ammonia is passed through the solution, orange red solution is obtained. Then the sum of the coordination number and the oxidation state of central metal in the yellow coloured solution is :