The compound exhibiting maximum value of equivalent conductance in fused state is

Options

A. `SrCl_(2)`
B. `CaCl_(2)`
C. `MgCl_(2)`
D. `BeCl_(2)`

Answer

To determine which compound exhibits the maximum value of equivalent conductance in the fused state, we need to understand a few key concepts regarding ionic compounds and their behavior in different states.

### Step-by-Step Solution:

1. **Understanding Equivalent Conductance**:
Equivalent conductance (Λ) is a measure of the ability of an electrolyte to conduct electricity. It is defined as the conductance of a solution divided by the number of equivalents of solute in that solution.

2. **Fused State of Compounds**:
In the fused state, ionic compounds are melted and exist as free ions. The mobility of these ions is what contributes to the conductance of the compound.

3. **Group 2 Elements**:
The question refers to compounds from Group 2 of the periodic table, which includes Beryllium (Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), and Barium (Ba).

4. **Trends in Ionic Character**:
As we move down the group from Be to Ba, the ionic size increases, and the covalent character of the compounds decreases. This means that the compounds become more ionic in nature.

5. **Ionic Character and Conductance**:
Compounds with higher ionic character tend to have higher conductance in the fused state because the ions can move freely. Among the Group 2 elements, Strontium (Sr) has the highest ionic character due to its larger ionic size and lower covalent character.

6. **Conclusion**:
Therefore, the compound from Group 2 that exhibits the maximum value of equivalent conductance in the fused state is Strontium (Sr).

### Final Answer:
The compound exhibiting maximum value of equivalent conductance in the fused state is Strontium (Sr).

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