નીચે આપેલા જલીય દ્રાવણોને ધ્યાનમાં લો.
I. 125 ml દ્રાવણમાં 2.2 g ગ્લુકોઝ.
II. 250 ml દ્રાવણમાં 1.9 g કેલ્શીયમ ક્લોરાઈડ.
III. 500 ml દ્રાવણમાં 9.0 g યુરિયા.
IV. 750 mL દ્રાવણમાં 20.5 g એલ્યુમિનિયમ સલ્ફેટ.
આ દ્રાવણોના ઉત્કલનબિંદ્દુઓનો સાચો ચડતો ક્રમ શું થશે?
[આપેલ : મોલર દળ \(g mol ^{-1}\) માં છે. \(H =1, C =12, N=14, O =16, Cl =35.5, Ca =40, Al =27\) અને \(S =32\) ]

A I < II < III < IV
B III < II < I < IV
C II < III < IV < I
D II < III < I < IV

Verified Solution

Answer & Solution

Correct Answer

(A) I < II < III < IV

Step-by-step Solution

Detailed explanation

\(\Delta T_{b} = i \cdot k_{b} \cdot m\) મંદ દ્રાવણ માટે ( \(M=m\) )મોલારિટી \(i \times m\) (I) \(M _{\text {glucose }}=\frac{2.2}{180} \times \frac{1000}{125}=0.098\) \(0.098 \times 1\) (II) \(M _{ CaCl _2}=\frac{1.9}{111} \times \frac{1000}{250}=0.068\) \(0.068 \times 3\)…

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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