[" Walle of the rate collome in "7K_(2)],[" 3.The experimentally determined molar mass for what type of substances is always "],[" lower than the true value when water is used as solvent.Explain.Give one example "],[" of such a substance and one example of a substance which does not show a large "],[" variation from the true value."]

How do antiseptics differ from disinfectants?Does the same substance be used used as both?Give one example for each.

Assertion : Molecular mass of KCl calculated on the basis of colligative properties will be lower than the normal molecular mass. Reason : Experimentally determined molar mass is always lower than the true value. a)If both (A) and (R) are correct and (R) is the correct explanation of(A). b)If both (A) and (R) are correct, but (R) is not the correct explanation of (A). c)If (A) is correct, but (R) is incorrect. d)If both (A) and (R) are incorrect.

Give reasons for the following : (a) When 2g of benzoic acid is dissolved in 25 g of benzene, the experimentally determined molar mass is always greater than the true value. (b) Mixture of ethanol and acetone shows positive deviation from Raoult's Law. (c) The preservation of fruits by adding concentrated sugar solution protects against bacterial action.

Give reasons for the following : (a) When 2g of benzoic acid is dissolved in 25 g of benzene, the experimentally determined molar mass is always greater than the true value. (b) Mixture of ethanol and acetone shows positive deviation from Raoult's Law. (c) The preservation of fruits by adding concentrated sugar solution protects against bacterial action.