Question

Which of the following solvents is having its lowest Ebullioscopic constant?

Solvent	Boiling Point (K)
Chloroform	334.4
Diethyl Ether	307.8
Benzene	353.3
Carbon disulphide	319.4

Choose the correct answer from the options given below:

• A. Chloroform
• B. Diethyl Ether
• C. Benzene
• D. Carbon disulphide

Answer 1

The Correct Option is B

The ebullioscopic constant (\(k_b\)) of a solvent is indicative of how much its boiling point will increase when a solute is added to it. Generally, \(k_b\) is dependent on the solvent's specific properties, but a general trend can be observed: the lower the boiling point, the lower the ebullioscopic constant. To determine which solvent has the lowest ebullioscopic constant, we will compare their boiling points.

Solvent	Boiling Point (K)
Chloroform	334.4
Diethyl Ether	307.8
Benzene	353.3
Carbon Disulphide	319.4

Analyzing the boiling points of the provided solvents:

• Chloroform: 334.4 K
• Diethyl Ether: 307.8 K
• Benzene: 353.3 K
• Carbon Disulphide: 319.4 K

Among these, Diethyl Ether has the lowest boiling point at 307.8 K. Therefore, it is expected to have the lowest ebullioscopic constant.

Thus, the correct answer is Diethyl Ether.