Organic chem intro (aliphatic/aromatic, orbital hybridization)

Which of the following is not aliphatic compound?

• alkanes

• alkene

• alkyne

• arenes

Answer explanation

aliphatic compounds do not have benzene ring.

Example of arenes: benzene, methylbenzene, ethylbenzene etc.

Which of the following is not aromatic compounds?

• benzene

• phenylethene

• cyclohexanol

• benzoic acid

Answer explanation

cyclohexanol (C₆H₁₁OH) do not have benzene ring

toluene is

• cyclohexene

• methylbenzene

• phenylethene

• phenylamine

which of the following does not match?

• cumene =

  1-methylethyl benzene = isopropylbenzene

• aniline = phenylamide

• styrene = phenylethene

• vinyl chloride = chloroethene

Answer explanation

phenylamine = aniline, not phenylamide

Which of the following is not true about sp² hybridization?

• form 3 orbitals with the same energy level

• the orbitals forms sigma bonds with the same orientation

• it involves 1 s-orbital and 2 p-orbitals

• the orbitals were in trigonal planar orientated

Answer explanation

Which of the following compound does not have sp hybridized orbitals?

• I₃^-

• HCN

• CO₂

• ethyne

Answer explanation

Which of the following has sp³ hybridized orbitals?

• HCHO

• C₆H₅NO₂

• HCOOH

• CH₃⁺

Answer explanation

A molecule has atom with sp³ hybridized orbitals. The molecule cannot be ___ shape.

• linear

• trigonal pyramidal

• tetrahedral

• bent

Answer explanation