JEE Mains · Chemistry · STD 12 -1. Solution and colligative properties
\(1\) molal \(K _{4} Fe ( CN )_{6}\) solution has a degree of dissociation of \(0.4 .\) Its boiling point is equal to that of another solution which contains \(18.1\) weight percent of a non electrolytic solute \(A\). The molar mass of \(A\) is \(.......\, u\). (Round off to the Nearest Integer). [Density of water \(\left.=1.0\, g\, cm ^{-3}\right]\)
- A \(95\)
- B \(85\)
- C \(105\)
- D \(26\)
Answer & Solution
Correct Answer
(B) \(85\)
Step-by-step Solution
Detailed explanation
\(\quad \quad \quad \quad \quad K _{4} Fe ( CN )_{6} \rightleftharpoons 4 K ^{+}+ Fe ( CN )_{6}^{4-}\) Initial conc. \(1\, m\quad \quad \quad \quad \quad \quad 0\quad \quad \quad \quad 0\) Final conc. \((1-0.4) \,m \quad \quad 4 \times 0.4 \quad \quad 0.4\, m\)…
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