(A) A
(B) B
(C) C
(D) D
7 . Suppose an extraction with methylene chloride is performed, with the
desired compound initially in brine In a separatory funnel, which layer
will be the organic layer?(A) The top layer
(B) The bottom layer
(C) No layers are observed; methylene chloride and brine are miscible.
(D) More information is needed to answer the question.
8 . Silica gel is often used in thin-layer chromatography. What property does silica gel
probably possess that makes it useful for this purpose?(A) Acidity
(B) Polarity
(C) Specifically sized pores
(D) Aqueous solubility
9 . A mixture of sand, benzoic acid, and naphthalene in ether is best separated by: