According to Werner' s coordination theory, there are two kinds of valence primary or ______ and secondary or _____The former type of valency is ______while the latter type is______ .

Options

A. three , negative , positive , cations
B. different , negative , positive , anions
C. two , primary , secondary , anions
D. two , saturated , unsaturated , cations

Answer

**Step-by-Step Text Solution:**

1. **Identify the Types of Valency**: According to Werner's coordination theory, there are two types of valency: primary and secondary.

2. **Fill in the Blanks for Primary Valency**: The primary valency is also known as principal valency. Therefore, the first blank can be filled with "principal".

3. **Fill in the Blanks for Secondary Valency**: The secondary valency is also known as subsidiary valency. Thus, the second blank can be filled with "subsidiary".

4. **Define Primary Valency**: The primary valency is ionizable. This means it can be represented by ions that can dissociate in solution.

5. **Define Secondary Valency**: The secondary valency is non-ionizable. This refers to the coordination number that is formed by neutral ligands that do not dissociate in solution.

**Final Answer**:
According to Werner's coordination theory, there are two kinds of valence: primary or **principal** and secondary or **subsidiary**. The former type of valency is **ionizable** while the latter type is **non-ionizable**.

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