1.

Werner's theory was the first successful theory, which explained the properties of complexes. According to Werner's theory the primary and secondary valence of [Co(Cl3(NH3)3]Cl3 is :(a) 3 & 3 respectively (b) 6 & 6 respectively(c) 3 & 6 respectively (d) 6 & 3 respectively

Answer»

Correct Option (c) 3 & 6 respectively 

Explanation :

According to Werner's theory primary valence means oxidation state and secondary valance means coordination number. Let oxidation state of Co in [CoCl3(NH3)3Cl3 is x

x – 3 + 0 = + 3

x = 0

Primary valence = 3

Secondary valence = coordination numbers = 6



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