CHEM 219 MODULE 2 PRACTICE
EXAMINATION 2026 QUESTIONS WITH
ANSWERS GRADED A+
◍ propyl or n-propyl.
Answer: CH3CH2CH2
◍ Alkyne.
Answer: structural form
◍ Heptane.
Answer: C's: 7MF: C7H16SF: CH3(CH2)5CH3Isomer: 9
◍ melting and boiling points properties of alkanes.
Answer: LOW MPs and BPs due to weak attractive forces between
molecules
◍ The sigma bonds in alkanes are:.
Answer: covalent non-polar.
◍ Aromatic.
Answer: structural form
◍ solubility and density properties of alkanes.
Answer: NOT soluble in water, low density (< 1g/ml) so floats on top of
water
◍ Using the VSEPR method, predict the molecular geometry (shape and bond
angle) around the indicated atoms for the following structure:a) C(I) b)
C(II)c) Nd) S.
Answer: a) C(I) = 4 bond pairs = TETRAHEDRAL, 109.5°b) C(II) = 3 bond
pairs = TRIGONAL PLANAR, 120°c) N = 3 bond pairs/1 lone pair =
TRIGONAL PYRAMIDAL, 107°d) S = 2 bond pairs/2 lone pairs =
, ANGULAR/BENT, 105°
◍ The most important and stable conformation done by cyclohexane is?.
Answer: The chair conformation. There is no ring strain
◍ False.
Answer: Determine if the following statement regarding reactions of
carbonyl compounds is true or falseCarboxylic acids and derivatives (esters
anhydrides, halides) tend to react by nucleophilic acyl substitution since the
C=O is bonded to a good nucleophile
◍ What is the main source of hydrocarbons?.
Answer: Fossil fuels like coal, petroleum, and natural gas obtained by
mining and drilling.
◍ How do you compare the boiling point of alkanes?.
Answer: The longer the length of carbon, the higher the Boiling point. When
it is branched, it can have a higher boiling point, as long as it isn't the parent
chain that is branched.
◍ Characterize each of the following structural formula representations as
either a dash, condensed, super-condensed, or bond-line formula:.
Answer: a) Super-Condensedb) Condensedc) Bond-lined) Dash
◍ 2-methyl-1-propanol.
Answer: Name the following alcohol using IUPAC systematic nomenclature
◍ Cation.
Answer: Becomes positively charged when it loses an electron
◍ list two main types of reactions in ALKANES.
Answer: combustion and substitution (radical halogenation)
◍ Functional group: Amine.
Answer: Contain nitrogenExample: Ethylamine: a precursor to certain
herbicides Can be NH2
◍ Carboxylic Acid Structure.
Answer: R-C=O-OH
EXAMINATION 2026 QUESTIONS WITH
ANSWERS GRADED A+
◍ propyl or n-propyl.
Answer: CH3CH2CH2
◍ Alkyne.
Answer: structural form
◍ Heptane.
Answer: C's: 7MF: C7H16SF: CH3(CH2)5CH3Isomer: 9
◍ melting and boiling points properties of alkanes.
Answer: LOW MPs and BPs due to weak attractive forces between
molecules
◍ The sigma bonds in alkanes are:.
Answer: covalent non-polar.
◍ Aromatic.
Answer: structural form
◍ solubility and density properties of alkanes.
Answer: NOT soluble in water, low density (< 1g/ml) so floats on top of
water
◍ Using the VSEPR method, predict the molecular geometry (shape and bond
angle) around the indicated atoms for the following structure:a) C(I) b)
C(II)c) Nd) S.
Answer: a) C(I) = 4 bond pairs = TETRAHEDRAL, 109.5°b) C(II) = 3 bond
pairs = TRIGONAL PLANAR, 120°c) N = 3 bond pairs/1 lone pair =
TRIGONAL PYRAMIDAL, 107°d) S = 2 bond pairs/2 lone pairs =
, ANGULAR/BENT, 105°
◍ The most important and stable conformation done by cyclohexane is?.
Answer: The chair conformation. There is no ring strain
◍ False.
Answer: Determine if the following statement regarding reactions of
carbonyl compounds is true or falseCarboxylic acids and derivatives (esters
anhydrides, halides) tend to react by nucleophilic acyl substitution since the
C=O is bonded to a good nucleophile
◍ What is the main source of hydrocarbons?.
Answer: Fossil fuels like coal, petroleum, and natural gas obtained by
mining and drilling.
◍ How do you compare the boiling point of alkanes?.
Answer: The longer the length of carbon, the higher the Boiling point. When
it is branched, it can have a higher boiling point, as long as it isn't the parent
chain that is branched.
◍ Characterize each of the following structural formula representations as
either a dash, condensed, super-condensed, or bond-line formula:.
Answer: a) Super-Condensedb) Condensedc) Bond-lined) Dash
◍ 2-methyl-1-propanol.
Answer: Name the following alcohol using IUPAC systematic nomenclature
◍ Cation.
Answer: Becomes positively charged when it loses an electron
◍ list two main types of reactions in ALKANES.
Answer: combustion and substitution (radical halogenation)
◍ Functional group: Amine.
Answer: Contain nitrogenExample: Ethylamine: a precursor to certain
herbicides Can be NH2
◍ Carboxylic Acid Structure.
Answer: R-C=O-OH
