The reaction of 2 methylbutane with chlorine yield 5 monochloro derivative. Methylbutane has four carbon atoms which react with chlorine. The carbon with antibonding will be chiral and it will react with chlorine. there will be four difference group around chiral carbon hence it will have stereoisomers.
Your answer would be shorter wavelength and equal speed !
That depends on what the reaction is. Do you have more info related to this problem?
