“The total volume occupied by a gaseous mixture is equal to the sum of the pure component volumes”. This is the _____________ law?
(A) Dalton’s
(B) Amagat’s
(C) Gay-Lussac’s
(D) Avogadro’s
Which of the following gravity scales is used exclusively for liquids heavier than water ?
(A) Baume scale
(B) Twaddell scale
(C) API scale
(D) None of these
In case of a solution (not of a solid in a liquid), whose total volume is more than the sum of volumes of its components in their pure states, solubility is__________________?
(A) Independent of the temperature
(B) Increased with the increase in pressure
(C) Decreased with the increase in pressure
(D) Unchanged by the pressure change
The forces causing the vaporisation of liquid are derived from the Kinetic energy of translation of its molecules. The heat of vaporisation_________________?
(A) Increases with pressure rise
(B) Decreases with increasing pressure
(C) Becomes zero at the critical point
(D) Both
_____________ fuels require the maximum percentage of ‘excess air’ for complete combustion ?
(A) Solid
(B) Liquid
(C) Gaseous
(D) Nuclear
Acidity or alkanity of a solution is expressed by its pH value, which is defined as (where, [H+] = hydrogen ion concentration in the solution) ?
(A) log (1/H+)
(B) – log (1/H+)
(C) 1/log H+
(D) None of these
Heat of transition is the heat evolved or absorbed, when a substance is converted from_________________?
(A) Vapor to liquid
(B) Vapor to solid
(C) Solid to liquid
(D) One allotropic form to another allotropic form
Gases diffuse faster compared to liquids because of the reason that the liquid molecules_________________?
(A) Are held together by stronger inter-molecular forces
(B) Move faster
(C) Have no definite shape
(D) Are heavier
If the pressure of a gas is reduced to half & its absolute temperature is doubled, then the volume of the gas will_________________?
(A) Be reduced to 1/4th
(B) Increase four times
(C) Increase two times
(D) None of these