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JEE Mains · Chemistry · STD 12 -1. Solution and colligative properties
The elevation of boiling point of \(0.10\, m\) aqueous \(CrCl _{3}, xNH _{3}\) solution is two times that of \(0.05\, m\) aqueous \(CaCl _{2}\) solution. The value of \(x\) is......... [Assume \(100 \%\) ionisation of the complex and \(CaCl _{2},\) coordination number of \(Cr\) as \(6,\) and that all \(NH _{3}\) molecules are present inside the coordination sphere \(]\)
- A \(10\)
- B \(5\)
- C \(12\)
- D \(15\)
Answer & Solution
Correct Answer
(B) \(5\)
Step-by-step Solution
Detailed explanation
\(\Delta T_{b}=i \times K_{b} \times m\) \(i \times 0.1 \times K_{b}=3 \times 0.05 \times K_{b} \times 2\) \(i=3\) \(\left[C r\left(N H_{3}\right)_{5} \cdot C l\right] C l_{2} \rightarrow\left[C r\left(N H_{3}\right)_{5} C l\right]^{+2}+2 C l^{-}\) \(x=5\)
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