COMEDK · Chemistry · 17. Solutions

The ebullioscopic constant is the elevation in boiling point produced by

A 1 molar solution
B 1 molal solution
C \(1 \mathrm{~N}\) solution
D \(10 \%\) solution

Verified Solution

Answer & Solution

Correct Answer

(B) 1 molal solution

Step-by-step Solution

Detailed explanation

The ebullioscopic constant \(\left(K_{b}\right)\) is the elevation in boiling point produced by 1 molal solution i.e. \(\quad \Delta T_{b}=K_{b} m\) When, \(\quad m=1\) \(K_{b}=\Delta T_{b}\)

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.

Same subject

Match the items in Column I with their description in Column II

S.No.	Column I	S.No.	Column II
A	Kappa K	P	Intensive property.
B	\(E_{cell}^0\)	Q	Extensive property.
C	Molar conductivity	R	Decreases with decrease in concentration of both strong and weak electrolytes.
D	\(\Delta G_{cell}\)	S	Increases with dilution.

COMEDK 2023 Medium

Explore more questions on app

From COMEDK

Explore more questions on app