Redox Reactions Question 3
Question 3 - 2024 (01 Feb Shift 1)
Given below are two statements :
Statement (I) : Potassium hydrogen phthalate is a primary standard for standardisation of sodium hydroxide solution.
Statement (II) : In this titration phenolphthalein can be used as indicator.
In the light of the above statements, choose the most appropriate answer from the options given below:
(1) Both Statement I and Statement II are correct
(2) Statement I is correct but Statement II is incorrect
(3) Statement I is incorrect but Statement II is correct
(4) Both Statement I and Statement II are incorrect
Show Answer
Answer (1)
Solution
Statement (I) : Potassium hydrogen phthalate is a primary standard for standardisation of sodium hydroxide solution as it is economical and its concentration does not changes with time.
Phenophthalin can acts as indicator in acid base titration as it shows colour in $\mathrm{pH}$ range 8.3 to 10.1
