Question

Which of the following has maximum boiling point?
A.Iso-octane
B.N-octane
C.2,2,3,3-tetramethyl butane
D.N-butane

Answer 1

Hint: N-octane is a straight chain exacerbate that has a very large surface area. Along these lines, there are more van der Waals forces of attraction, bringing about high boiling points.

Complete answer:
- Boiling point is characterized as the specific temperature at which the vapor pressure of the fluid is equivalent to the environment pressure.
- Vapor pressure is the pressure applied by the vapor delivery by the vapor delivered by a fluid or strong substance in a shut compartment or space.
- Let’s take the instance of water as an example. The vapor pressure of the water at room temperature is 0.0313 atm.
- To expand the vapor pressure of the water, we have to build the temperature. Thus, we heat the water and increment the vapor pressure. After some time, the temperature of water increases too.
- Now, the vapor pressure of water likewise increments to 1 atm which is equivalent to the barometric pressure at a drift level. Along these lines, we give $100^{\circ }C$ the title of ‘boiling point of a drift water level’.

Therefore, the correct answer is option (B).

Note:
Along these lines, less measure of increment in vapor pressure is required to arrive at the barometric pressure. In this way, the measure of heat required to build the vapour pressure of water to arrive at the climatic pressure is not as much as that required at lower elevations.