Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE MainChemistrySolutions

Consider equimolar aqueous solutions of the following coordination compounds: (I) CoCl ₃ 6 NH ₃ (II) CoCl ₃ 5 NH ₃ (III) CoCl ₃ 4 NH ₃ (IV) CoCl ₃ 3 NH ₃ Assuming complete ionization of the ionizable parts, the correct increasing order of their boiling points is:

Options

  1. A(I) < (II) < (III) < (IV)
  2. B(IV) < (III) < (II) < (I)
  3. C(IV) < (I) < (II) < (III)
  4. D(I) < (III) < (II) < (IV)

Correct answer

B. (IV) < (III) < (II) < (I)

Step-by-step solution

According to Werner's coordination theory, Cobalt(III) exhibits a secondary valency (coordination number) of 6. The modern formulas for these complexes and their van't Hoff factors ( i ) upon complete ionization are: (I) [ Co ( NH ₃)₆] Cl ₃ [ Co ( NH ₃)₆]³⁺ + 3 Cl ^- Number of ions, i = 4 (II) [ Co ( NH ₃)₅ Cl ] Cl ₂ [ Co ( NH ₃)₅ Cl ]²⁺ + 2 Cl ^- Number of ions, i = 3 (III) [ Co ( NH ₃)₄ Cl ₂] Cl [ Co ( NH ₃)₄ Cl ₂]^+ + Cl ^- Number of ions, i = 2 (IV) [ Co ( NH ₃)₃ Cl ₃] Does not ionize (non-electrolyte) Number o

Practice Solutions on Quantrex Academy →

More from Solutions

In a solvent S , a compound B is partially dissociated into C and D as given below: B 2 C + 2 D B , C and D are non-volatile in nature. The molar mass of B is 10 times the molar ma 2026Passage: Two volatile liquids A and B form an ideal solution. Consider a 5 molal solution of B in A inside a closed container having a total vapour pressure of 100 mm Hg at 300 K. 2026Passage: Two volatile liquids A and B form an ideal solution. Consider a 5 molal solution of B in A inside a closed container having a total vapour pressure of 100 mm Hg at 300 K. 2026Given below are two statements: Given: Molar mass of C, H, O, Cl are 12, 1, 16 and 35.5 g mol ⁻¹ , respectively. Statement I: In 30 % (w/w) solution of methanol in CCl ₄ (at T K), 2026Which of the following statements are not correct? A. For water, magnitude of K_b is more than the magnitude of K_f . B. The elevation in boiling point of water when a non-volatile 2026Given below are two statements : Statement I : H₂ O molecules move from the chamber 1 to chamber 2 . Statement II : The osmotic pressure of a solution prepared by dissolving 50 mg 2026When 0.25 moles of a non-volatile, non-ionizable solute was dissolved in 1 mole of a solvent the vapor pressure of solution was x % of vapor pressure of pure solvent. What is x % ? 202620 g hemoglobin in a 1 L aqueous solution (A) at 300 K is separated from pure water by semi permeable membrane. At equilibrium the height of solution in a tube dipped in a solution 2026 Full Solutions list All JEE Main PYQs