Theme one CMY 128 Exam Complete Questions And Answers Graded A+.
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Course
CMY
Institution
CMY
When drawing a condensed structure of an organic compound, multiple bond lines are usually ______ while single bond lines are often ______.
Multiple choice question.
omitted, included
included, omitted - correct answer included, omitted
In the skeletal str...
In the skeletal structure for an organic compound, it is assumed that there is a ............................, atom
at the end of any line and at the junction of any two lines. This type of structure omits all ................,
atoms except those directly bonded to a heteroatom. - correct answer Carbon
Hydrogen
Determine the number of hydrogen atoms attached to each of the marked C atoms in the structure
shown. - correct answer a=3
b=1
c=2
When interpreting skeletal structures of charged species, the number of lone pairs on a particular atom
depends on the charge on that atom. Match each charge with the number of lone pairs present on the
relevant atom. - correct answer no lone pairs = A carbon atom with a positive
charge (and 3 bonds)
one lone pair = A carbon atom with a negative charge (and 3 bonds)
three lone pairs = An oxygen atom with a negative charge (and one bond)
Both of the structures shown contain a charged carbon atom. In each case, indicate the number of
hydrogen atoms attached to the charged carbon as well as the number of lone pairs it has. - correct
answer Structure c = one H atom, no lone pairs
Structure d = one H atom, one lone pair
, Which of the following statements correctly describe the conventions used when drawing condensed
structures in organic chemistry? (Select all that apply.)
Parentheses are used around similar groups that appear anywhere in the molecule
Hydrogen atoms are omitted
Lone pairs are omitted
All bonds are drawn
Atoms are drawn next to the atoms to which they are bonded - correct answer Lone
pairs are omitted
Atoms are drawn next to the atoms to which they are bonded
Which of the following statements correctly describe the conventions used when drawing a skeletal
structure for an organic compound? (Select all that apply.)
All hydrogen atoms are included in the drawing.
Parentheses are used for identical groups bonded to the same atom.
All heteroatoms are drawn and the hydrogens directly bonded to them.
The unlabeled end of a line represents a C atom.
It is assumed that every carbon atom has enough hydrogens to make it tetravalent. - correct answer
All heteroatoms are drawn and the hydrogens directly bonded to them.
The unlabeled end of a line represents a C atom.
It is assumed that every carbon atom has enough hydrogens to make it tetravalent.
There are _____ hydrogen atom(s) attached to Ca, _____ hydrogen atom(s) attached to Cb, and _____
hydrogen atom(s) attached to Cc in the structure shown.
3; 1; 0
3; 0; 1
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