Hydrocarbons

Arrange the following compounds in order of their increasing boiling points:
n-Pentane, n-Hexane, Ethane, 2-2-Dimethylpentane, 2-Methylpentane.

Name the metal which is a constituent of Grignard's reagent.

What is the function of iodic acid in the iodination of alkanes? Can we use any other substance in its place?

During the pyrolysis of alkanes C-C bonds break in preference to C-H bond. Why?

What is alternation effect?

Out of n-pentane, isopentane and neopentane which has lower boiling point?

Alkanes are less reactive. Why?

Define cracking. 

Name the products formed when an ethereal solution containing ethyl iodide and methyl iodide is heated with sodium metal.