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JEE Main 202310 AprilMorning Shift
Exam
JEE Main
Year
2023
Date
10 April
Shift
Morning Shift
Subject
Chemistry
Chapter
d and f Block Elements

JEE Main 2023 · 10 April · Morning Shift · Chemistry · d and f Block Elements

Given below are two statements: Statement I : Aqueous solution of K...

Given below are two statements:

Statement I : Aqueous solution of K2Cr2O7{K}_{2}{Cr}_{2}{O}_{7} is preferred as a primary standard in volumetric analysis over Na2Cr2O7{Na}_{2}{Cr}_{2}{O}_{7} aqueous solution.

Statement II : K2Cr2O7{K}_{2}{Cr}_{2}{O}_{7} has a higher solubility in water than Na2Cr2O7{Na}_{2}{Cr}_{2}{O}_{7}. In the light of the above statements, choose the correct answer from the options given below:

Options

  1. AStatement II is false but Statement IIII is true
  2. BBoth Statement II and Statement IIII are true
  3. CStatement II is true but Statement IIII is false
  4. DBoth Statement II and Statement IIII are false

Correct answer

C. Statement II is true but Statement IIII is false

Step-by-step solution

K2Cr2O7{K}_{2}{Cr}_{2}{O}_{7} is generally preferred than Na2Cr2O7{Na}_{2}{Cr}_{2}{O}_{7} in volumetric analysis as Na2Cr2O7{Na}_{2}{Cr}_{2}{O}_{7} is hygroscopic in nature, therefore it is difficult to prepare its standard solution for volumetric analysis as accurate weighing is not possible in normal atmospheric conditions. A hygroscopic substance can absorb moisture from the atmosphere due to which there will be inaccuracy in weight.

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