Questions:

$1-$ When a purple solution of KMnO$4$ is added to a different unknown, a brown precipitate forms. What can be said about this unknown?

$2-$ The compound $1-$Pentene is alkene. Based on your observations in this experiment, what should you expect to see for this compound in the following tests: a$.$ Bromine test, b$.$ KMnO$4$ test, c$.$ Combustion.

$3-$ Write the structure of the major organic product for the following reactions; if no reaction, write NR$.$

$8H_{10}$

$(3.)C{H}_{3}CH=CHC{H}_3+H_{2}S{O}_{4}longrightarrowC{H}_{3}C{H}_{2}C{H}_{2}CH$

$4-$

$+KMn{O}_{4}longrightarrowN{O}_4$ Reaction

$C_6{H}_6$