किसी विलेय के (3,g) से (250,mL) विलयन बनाया गया। (300,K) पर परासरण दाब (0.738,atm) है। यदि विलेय का (i=0.75) है, तो वास्तविक मोलर द्रव्यमान क्या होगा?
A (250,mL) solution is prepared from (3,g) solute. At (300,K), osmotic pressure is (0.738,atm). If the solute has (i=0.75), what is the true molar mass?
Explanation opens after your attempt
C. \(400,g,mol^{-1}\)
Concept
From \(\pi=iCRT\), \(C=\frac{0.738}{0.75\times0.082\times300}=0.04,M\).
Why this answer is correct
(250,mL=0.25,L), so moles \(=0.04\times0.25=0.01\).
Exam Tip
Molar mass \(=\frac{3}{0.01}=300,g,mol^{-1}\). चरण 1: \(\pi=iCRT\), इसलिए \(C=\frac{0.738}{0.75\times0.082\times300}=0.04,M\)। चरण 2: (250,mL=0.25,L), अतः मोल \(0.04\times0.25=0.01\) हैं। चरण 3: मोलर द्रव्यमान \(=\frac{3}{0.01}=300,g,mol^{-1}\)।
Login to save your score, XP, coins and progress.
