Chem 51A Study section (quizzes 1-8) Questions With
Complete Solutions
match the chemical to its fate in the human body
(1) acetaminophen (Tylenol)
(2) DDT
(3) ethylene glycol
(1) metabolized and removed by the liver
(2) bioaccumulation - sto
(3) metabolized and calcium
match the toxic class to the chemical
(4) sensitizer
(5) asphyxiant
(6) teratogen
(7) carcinogen
(8) organ toxicant
(9) neurotoxin
(10) Poison
(4) formaldehyde
(5) carbon monoxide
(6) acrylonitrile
(7) benzene
(8) ethanol
(9) acetone
(10) cyanide
,If a solid does not melt when placed in a capillary in a Digi-
Melt, which of the following assumptions may be true?
= the chemical doesn't have a liquid state
= The Digi-Melt doesn't go up to a high enough temperature to
melt the solid
= no information can be found by taking a melting point of this
compound
= the Digi-Melt is broken
The Digi-Melt doesn't go up to a high enough temperature to
melt the solid,
the Digi-Melt is broken
The same extract mixture was spotted on three TLC plates and
then each plate was developed in a different eluent mixture
(1) Which plate demonstrates the best separation of the mixture?
(2) Which eluent mixture was the most polar?
(3) Which eluent mixture has an intermediate polarity (relative
to the polarity of the other two mixtures)?
, (1) #2
(2) #1
(3) #2
which of the following results indicated the product of the
synthesis is vanillic acid?
= melting point is above the DigiMelt range
= solid had a vanilla odor
= Rf from TLC is same as vanillic acid from Fundamental skills
= solid melted below 100 degrees C
= solid is soluble in water
Rf from TLC is same as vanillic acid TLC from fundamental
skills,
solid is soluble in water
If vanillic acid is the product of the reaction between vanillin
and hydrogen peroxide,
(1) the reduction half reaction is ____
(2) the oxidation half reaction is ____
Complete Solutions
match the chemical to its fate in the human body
(1) acetaminophen (Tylenol)
(2) DDT
(3) ethylene glycol
(1) metabolized and removed by the liver
(2) bioaccumulation - sto
(3) metabolized and calcium
match the toxic class to the chemical
(4) sensitizer
(5) asphyxiant
(6) teratogen
(7) carcinogen
(8) organ toxicant
(9) neurotoxin
(10) Poison
(4) formaldehyde
(5) carbon monoxide
(6) acrylonitrile
(7) benzene
(8) ethanol
(9) acetone
(10) cyanide
,If a solid does not melt when placed in a capillary in a Digi-
Melt, which of the following assumptions may be true?
= the chemical doesn't have a liquid state
= The Digi-Melt doesn't go up to a high enough temperature to
melt the solid
= no information can be found by taking a melting point of this
compound
= the Digi-Melt is broken
The Digi-Melt doesn't go up to a high enough temperature to
melt the solid,
the Digi-Melt is broken
The same extract mixture was spotted on three TLC plates and
then each plate was developed in a different eluent mixture
(1) Which plate demonstrates the best separation of the mixture?
(2) Which eluent mixture was the most polar?
(3) Which eluent mixture has an intermediate polarity (relative
to the polarity of the other two mixtures)?
, (1) #2
(2) #1
(3) #2
which of the following results indicated the product of the
synthesis is vanillic acid?
= melting point is above the DigiMelt range
= solid had a vanilla odor
= Rf from TLC is same as vanillic acid from Fundamental skills
= solid melted below 100 degrees C
= solid is soluble in water
Rf from TLC is same as vanillic acid TLC from fundamental
skills,
solid is soluble in water
If vanillic acid is the product of the reaction between vanillin
and hydrogen peroxide,
(1) the reduction half reaction is ____
(2) the oxidation half reaction is ____
