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Chem 120 final exam questions and answers 2024
Chem 120 final exam questions and answers 2024
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Chem 120 final exam questions andanswers 2024
What is the correct order of melting points for the following alkanes, from highest to
lowest temperature? - ANS-heptane > hexane > ethane > methane
2. Given an alkane that contains 25 carbon atoms. How many hydrogen atoms are
present in its structure? a) - ANS-) 52
3. Which of the following properly describes constitutional (structural) isomers? -
ANS-compounds with the same molecular formula, but a different order of attachment of
atoms
4. How many secondary and tertiary carbons, respectively, are in the following
compound? - ANS-) 2, 3
5. What is the molecular formula and name of the following compound? - ANS-C4H9Cl,
2-chlorobutane
6. What is the IUPAC name of the compound below? - ANS-methylcyclohexane
which reaction type is most characteristic of alkenes? - ANS-addition
what is the IUPAC name for the compound below? - ANS-trans- 2, 3-
dichlorvos-2-pentene
what is the structure and name of the product of the following reaction? -
ANS-ch3ch2ch2ch3, butane
alkanes and alkenes are no polar compounds and hence have poor solubility in water -
ANS-true
carbon monoxide may be produced in the incomplete combustions of methane. -
ANS-true
The names ortho- dimethylbenzene and 1,4- dimethylbenzene represent the same
, compound - ANS-false
if a compound's name ends with " diene", this suggest that is it an alkene containing two
double bonds in its structure - ANS-true
what is the oxidation of a primary alcohol - ANS-aldehyde
which of the following alcohol is tertiary alcohol? - ANS-2- methyl- 2- butanol
what compound is produced when 2 methyl-3 pentanol is oxidized ? - ANS-2 methyl- 3
pentanone
what class of compounds is represented by the general formula R-O-R - ANS-ethers
which of the following compounds will give a silver mirror finish when treated with
tollens' reagent ? - ANS-butanal
which is the IUPAC name for the following compounds - ANS-2-chloro, 3- hexanol
what is the proper IUPAC name for the three carbon aldehyde - ANS-propanal
what class of compounds is commonly used as a medical anesthetic - ANS-ethers
a phenol is a compound that contains a hydroxyl group attached to a benzene ring -
ANS-true
by definition oxidation is a process that involves removal of hydrogens - ANS-true
The oxidation of a ketoneproduces a carboxylic acid - ANS-true
14. Small (low molecular weight) aldehydesare generally lesswater-soluble than large
ones - ANS-true
1. You are given fourdifferentcompounds(A, B, C, and D)that havecomparable
weights:Compound A:etherCompound B:ketoneCompound C:alcoholCompound
D:alkaneD, A, B, C
b) Briefly explain your answer. (1 pt) - ANS-D, A, B, C
The highest b.pamong the four given compound is that of alcohol. Alcohols are able to
hydrogen-bond to each other and hence making the interactions between them stronger
and require higher energy to break apart. On the other hand, alkanes have the lowest
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