Two statements, one Assertion and the other Reason are given. Choose the correct option. Assertion: For strong electrolytes the plot of Molar conductivity versus Concentration gives a straight line with slope equal to +A and intercept equal to _ m . Reason: For strong electrolytes, _ m increases slowly with dilution due to increase in the distance between the ions and increase in ionic mobility

Step-by-step solution

The molar conductivity _ m of a strong electrolyte varies with concentration C according to the Kohlrausch equation: _ m = _ m ^ - A C , where _ m ^ is the molar conductivity at infinite dilution and A is a constant. The plot of _ m versus C is a straight line with a negative slope equal to -A and an intercept equal to _ m ^ . The Assertion states the slope is +A and the intercept is _ m , which is incorrect. For strong electrolytes, _ m increases slowly with dilution because the inter-ionic attractions decrease as