Consider the following statements:
According the Werner's theory.
(1) Ligands are connected to the metal ions by ionic bonds.
(2) Secondary valencies have directional properties
(3) Secondary valencies are non-ionisable
Of these statements :

Options

A. 1,2 and 3 are correct
B. 2 and 3 are correct
C. 1 and 3 are correct
D. 1 and 2 are correct

Explanation

To analyze the statements according to Werner's theory, let's evaluate each statement step by step.

### Step 1: Evaluate Statement 1
**Statement:** Ligands are connected to the metal ions by ionic bonds.
**Analysis:** According to Werner's theory, ligands are not connected to metal ions by ionic bonds. Instead, they are connected through coordinate bonds (also known as dative bonds), where the ligand donates a pair of electrons to the metal ion.
**Conclusion:** This statement is **incorrect**.

### Step 2: Evaluate Statement 2
**Statement:** Secondary valencies have directional properties.
**Analysis:** In Werner's theory, the secondary valency refers to the coordination number, which indicates how many ligands are surrounding the central metal atom. The arrangement of these ligands around the metal ion is indeed directional, leading to specific geometries such as tetrahedral or octahedral shapes.
**Conclusion:** This statement is **correct**.

### Step 3: Evaluate Statement 3
**Statement:** Secondary valencies are non-ionizable.
**Analysis:** Secondary valencies correspond to the coordination number and involve coordinate bonds, which are not ionizable. This means that the ligands remain attached to the metal ion and do not dissociate in solution.
**Conclusion:** This statement is **correct**.

### Final Conclusion
Based on the evaluations:
- Statement 1 is incorrect.
- Statement 2 is correct.
- Statement 3 is correct.

Thus, the correct statements according to Werner's theory are **Statement 2 and Statement 3**.