Dilution affects both conductivity as well as molar conductivity. The effect of dilution on both is as follows:
- (A)both increase with dilution.
- (B)both decrease with dilution.
- (C)conductivity increases whereas molar conductivity decreases on dilution.
- (D)conductivity decreases whereas molar conductivity increases on dilution.✓ Correct
Answer: (D)
Solution
On dilution the number of ions per unit volume falls, so conductivity decreases.
Molar conductivity refers to one mole of electrolyte; the fall in outweighs the fall in (and for weak electrolytes dissociation also increases), so increases on dilution.
Molar conductivity refers to one mole of electrolyte; the fall in outweighs the fall in (and for weak electrolytes dissociation also increases), so increases on dilution.
CBSE Class 12 Board · 2024 · Single correct option