The functional groups that are responsible for the ion-exchange property of cation and anion exchange resins,respectively,are :

The weight of oxalic acid that will be required to prepare a $1000 \ mL$ $(N / 20)$ solution is

Given below are two statements
Statement $I$: Aqueous solution of $K_2Cr_2O_7$ is preferred as a primary standard in volumetric analysis over $Na_2Cr_2O_7$ aqueous solution.
Statement $II$: $K_2Cr_2O_7$ has a higher solubility in water than $Na_2Cr_2O_7$.
In the light of the above statements,choose the correct answer from the options given below:

Of all the three common mineral acids,only sulphuric acid is found to be suitable for making the solution acidic in redox titrations involving $KMnO_4$ because:

Why is it essential to wash the precipitate with water before estimating it quantitatively?

Which of the following cannot give iodometric titrations?