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JEE Main20241 Feb 2024Morning ShiftChemistryRedox ReactionsActual

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:

Options

  1. ABoth Statement I and Statement II are correct
  2. BStatement I is correct but Statement II is incorrect
  3. CStatement I is incorrect but Statement II is correct
  4. DBoth Statement I and Statement II are incorrect

Correct answer

A. Both Statement I and Statement II are correct

Step-by-step solution

A primary standard solution is a highly purified compound that is used to standardise a solution of known concentration for use in titrations and other analytical chemistry procedures. Potassium hydrogen phthalate is primary standard for NaOH . Formula for Potassium hydrogen phthalate is C 6 H 5 O 4 K . It behaves as a monobasic acid. Phenolphthalein is used as an indicator in this titration. The reaction is, Hence option A is the answer.

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