The boiling points of alkenes depends on the magnitude of attractive force between their molecules. Three alkenes are listed below. Identify the alkene with maximum boiling point. Justify.
Isopentane, n-pentane, neopentane.

Arrange the three isomers of pentane in increasing order of their boiling points.

Assertion : The boiling point of chloroform-acetone solution is larger than expected from ideal behaviour. Reason : The forces of attraction between unlike molecules are stronger than those between like molecules in the solution. This results in lower vapour pressure as compared to an ideal solution which is responsible for the higher boiling point.

Which compound has the higher boiling point in each of the following pairs? Substantiate your answers in regard to the difference in secondary force (attraction between molecules) in the two compounds, a. Heptane and Hexane b. Nonane and 3- methyl- octane c. Cyclopentane and pentane

The noble gases have closed-shell electronic configuration and are monoatomic gases under normal conditions. The low boiling points of the lighter noble gases are due to the weak dispersion forces between the atoms and the absence of other interatomic interactions, The direct reaction of xenon with fluorine leads to a series of compounds with oxidation numbers +2, 4 and +6, XeF_4 reacts violently with water to give XeO_3 . The compouds of xenon exhibit rich stereochemistry and their geometries can be deduced considering the total number of electron pairs in the valence shell. Argon is used in arc welding because of its

Assertion : In alcohols, the boiling point decreases with decrease in the branching of the carbon chain. Reason : -There is the increase in van der Waals/ forces between the number of carbon atoms with decrease in the surface area.