Oxalic acid dihydrate, H_(2)C_(2)O_(4). 2H_(2)O(s) is often used as a primary reagent to standardise sodium hydroxide solution. Which of these facts are reasons to choose this substance as a primary standard ? I. It is diprotic. II. It is a stable compound that can be weighed directly in air. III. It is available in pure form.

Oxalic acid dihydrate, H_(2)C_(2)O_(4). 2H_(2)O(s) is often used as a

1.	Oxalic acid dihydrate, H_(2)C_(2)O_(4). 2H_(2)O(s) is often used as a primary reagent to standardise sodium hydroxide solution. Which of these facts are reasons to choose this substance as a primary standard ? I. It is diprotic. II. It is a stable compound that can be weighed directly in air. III. It is available in pure form.
Answer» III only I and II only II and III only I, II and III Solution :N//A