For `BCl_(3), AlCl_(3)` and `GaCl_(3)` the increasing order of ionic character is

Options

A. `BCl_(3) lt AlCl_(3) lt GaCl_(3)`
B. `GaCl_(3) ltAlCl_(3)lt BCl_(3)`
C. `BCl_(3) lt GaCl_(3) lt AlCl_(3)`
D. `AlCl_(3) lt BCl_(3) lt GaCl_(3)`

Explanation

To determine the increasing order of ionic character for BCl₃, AlCl₃, and GaCl₃, we can follow these steps:

### Step 1: Understand Ionic Character
Ionic character refers to the extent to which a compound exhibits ionic bonding as opposed to covalent bonding. The ionic character is influenced by the electronegativity of the elements involved in the bond.

### Step 2: Identify the Elements and Their Electronegativity
We are dealing with three chlorides:
- BCl₃ (Boron trichloride)
- AlCl₃ (Aluminum trichloride)
- GaCl₃ (Gallium trichloride)

The electronegativities of the elements involved are:
- Boron (B): ~2.0
- Gallium (Ga): ~1.6
- Aluminum (Al): ~1.5

### Step 3: Determine the Decreasing Order of Electronegativity
From the values above, we can arrange the elements in decreasing order of electronegativity:
1. Boron (B) - 2.0
2. Gallium (Ga) - 1.6
3. Aluminum (Al) - 1.5

### Step 4: Relate Electronegativity to Ionic Character
The ionic character of a compound is inversely related to the electronegativity of the central atom. This means that as the electronegativity decreases, the ionic character increases. Therefore, the order of ionic character will be the reverse of the order of electronegativity.

### Step 5: Write the Increasing Order of Ionic Character
Based on the above analysis, we can conclude that:
- BCl₃ has the highest electronegativity and thus the lowest ionic character.
- AlCl₃ has a medium electronegativity and thus a medium ionic character.
- GaCl₃ has the lowest electronegativity and thus the highest ionic character.

Thus, the increasing order of ionic character is:
**BCl₃ < AlCl₃ < GaCl₃**

### Summary of the Solution
The increasing order of ionic character for BCl₃, AlCl₃, and GaCl₃ is:
**BCl₃ < AlCl₃ < GaCl₃**