pls answer 1-4 I would like to check with my answer

1) Saponification of triglycerides gives glycerol and fatty acidsalts as shown in the equation below. The groups R1, R2 and R3represent hydrocarbon chains that may be the same or different.

Saponification is actually a hydrolysis reaction. Explain what ahydrolysis reaction is and the role of sodium hydroxide in thisprocess.

2)The over-the-counter drug Ibuprofen is a 1:1 mixtureof R and S isomers of the compound 2-(4-isobutylphenyl)propanoicacid. The two compounds have identical physical properties, butonly the S isomer has drug activity. Explain the structuraldifference between these isomers that accounts for theseobservations.

3) Halogenation of alkanes in the presence oflight is an example of an organic reaction that occurs via freeradical intermediates.One example of this is the reaction betweenmethane and chlorine shown in the equations below. Free radicalreactions occur in a series of steps called Initiation, Propagationand Termination. Write equations to show an example of each ofthese steps in the reaction of methane with chlorine in thepresence of light.

Initiation reaction (1 mark)

Propagation reaction (1 mark)

Termination reaction (1 mark)

4) The preparation of ethoxybenzene from the reactionbetween sodium phenoxide and bromoethane is shown in the equationbelow. Like most organic reactions, this can be described as aninteraction between an electron rich species (nucleophile) and anelectron deficient species (electrophile).

a) Examine the equation and clearly label each reactantas the nucleophile or electrophile as appropriate.

b) Write an equation to show how sodium phenoxide couldbe prepared from phenol (hydroxybenzene).