Chem 120 exam (2025) actual exam (detailed & elaborated) comprehensive questions and verified accurate solution 2025 test!!

Chem 120 exam (2025) actual exam (detailed & elaborated) comprehensive questions and
verified accurate solution 2025 test!!
What is the correct order of melting points for the following alkanes, from highest to lowest
temperature? - -heptane > hexane > ethane > methane

--2. Given an alkane that contains 25 carbon atoms. How many hydrogen atoms are present
in its structure? a) - -) 52

--3. Which of the following properly describes constitutional (structural) isomers? - -
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?
- -) 2, 3

--5. What is the molecular formula and name of the following compound? - -C4H9Cl, 2-
chlorobutane

--6. What is the IUPAC name of the compound below? - -methylcyclohexane

--which reaction type is most characteristic of alkenes? - -addition

--what is the IUPAC name for the compound below? - -trans- 2, 3- dichlorvos-2-pentene

--what is the structure and name of the product of the following reaction? - -ch3ch2ch2ch3,
butane

--alkanes and alkenes are no polar compounds and hence have poor solubility in water - -
true

--carbon monoxide may be produced in the incomplete combustions of methane. - -true

--The names ortho- dimethylbenzene and 1,4- dimethylbenzene represent the same
compound - -false

--if a compound's name ends with " diene", this suggest that is it an alkene containing two
double bonds in its structure - -true

--what is the oxidation of a primary alcohol - -aldehyde

--which of the following alcohol is tertiary alcohol? - -2- methyl- 2- butanol

--what compound is produced when 2 methyl-3 pentanol is oxidized ? - -2 methyl- 3
pentanone

--what class of compounds is represented by the general formula R-O-R - -ethers

, --which of the following compounds will give a silver mirror finish when treated with tollens'
reagent ? - -butanal

--which is the IUPAC name for the following compounds - -2-chloro, 3- hexanol

--what is the proper IUPAC name for the three carbon aldehyde - -propanal

--what class of compounds is commonly used as a medical anesthetic - -ethers

--a phenol is a compound that contains a hydroxyl group attached to a benzene ring - -true

--by definition oxidation is a process that involves removal of hydrogens - -true

--The oxidation of a ketoneproduces a carboxylic acid - -true

--14. Small (low molecular weight) aldehydesare generally lesswater-soluble than large ones
- -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) - -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 b.p
because they have no ability to hydrogen bond.

--give the IUPAC name of the following compound:(1.5pt) - -ch3ch2ch2↓chch3
sh
IUPAC name: 2-pentanethiol

--Which of the following statements concerning acids and bases is FALSE? - -e) Carboxylic
acids behave as acids because they can accepta proton (H+) when they are dissolved in
water

--. What is the pH of a solution that has [H3O+] = 6.0 × 10-3M? - -b)2.22

--Which statement BEST explains why amides havea much higher boiling point than
alkanes(assuming both have comparable masses)? - -c) An amide can strongly hydrogen-
bond to other amide molecules whereas an alkane

--how many hydrogens are directly attached to the nitrogen atom of ammonia? - -d) 3

--Which of the following is NOT a neurotransmitter in the human body? - -d)Aspartame

--Which of the following would NOT be classified as a primary amine? - -N-methyl-2-
pentanamine