Question

Assertion (A): Dilute Sulphuric acid is a stronger electrolyte than concentrated Sulphuric acid.
Reason (R): Dilute Sulphuric acid has a higher concentration of mobile ions than concentrated Sulphuric acid.

• A. (A) is true but (R) is false.
• B. (A) is false but (R) is true.
• C. Both (A) and (R) are true and (R) is the correct explanation of (A).
• D. Both (A) and (R) are true, but (R) is not the correct explanation of (A).

Hint:

Pure 100% sulphuric acid is a poor conductor because it contains almost no ions. It’s the water that "unlocks" the ions through the process of electrolytic dissociation!

Answer 1

The Correct Option is C

Step 1: Understanding Electrolytes: 
An electrolyte's strength is determined by its ability to conduct electricity, which depends on the presence of free, mobile ions. 

Step 2: Comparing Dilute and Concentrated Acid: 
Concentrated sulphuric acid is largely composed of molecules (H_2SO_4). Dilution with water causes the acid to ionize into H^+ and SO_4^2- ions. 

Step 3: Linking Ionization to Conductivity: 
Because dilute acid contains a significantly higher number of dissociated, mobile ions compared to the molecular form of concentrated acid, it conducts electricity much more effectively. 

Step 4: Final Answer: 
Both statements are true; the higher concentration of ions in the dilute form is exactly why it is a stronger electrolyte.