Which of the following elastic constant will be dimensionless?

Which of the following is not a dimensional constant ?

If E_0 and mu_0 respectively denote the permittivity constant and permeability constant ,then which of the following expression is dimensionally correct ?Here'C' is velocity of light in vacuum, then C=

Correct the following statement. Dielectric constant of a dielectric varies directly with the temperature.

Define the following terms. Molal elevation constant

At constant temperature and pressure, which of the following statement is true for the reaction. CO[g]+1/2O_2[g]-rarrCO_2[g]

Define the following terms. Molal depression constant