$1.$ Splitless injections are sometimes necessary for trace analyses, where the

analyst hopes to recover $100\%$ of the analytes that are injected. Successful

splitless analyses require careful optimization of a number of parameters.

Discuss this statement.

$2.$ Jezza believes that a GC mobile phase plays no other part in separations.

Please give your opinion.

$3.$ Aidil would like to separate simultaneously polycyclic aromatic hydrocarbons

$(3$ compounds$)$ and organochlorine pesticides $(4$ compounds$)$ using GCECD. Draw the expected chormatogram. Justify your answer.

$4.$ Discuss factors that contribute to retention time shifts in GC$.$

$5.$ Rani found that all peaks reduced in size during analysis of compounds A

using GC$-$FID. Please discuss factors that contribute to this issue.