question

To which class of organic compounds does trimyristin belong? a) Ester b) Ethers c) Fatty Acids d) Glycerol e) Ketones

answer

c) Fatty Acids

question

How is trimyristin converted to myristic acid? a) Column Chromatography b) Recrystallization c) Simple Distillation d) Hydrolysis e) Fractional Distillation

answer

d) Hydrolysis

question

How many moles of myristic acid are produced by 1 mole of trymyristin? a) 0 b) 1 c) 1.5 d) 2 e) 3

answer

e) 3

question

Which concept is helpful in determining the conversion of trimyristin to myristic acid? a) Mixed Melting Point b) Hydrolysis c) Refluxing d) Column Chromatography e) B and C

answer

a) Mixed Melting Point

question

Suppose a student follows the procedure to hydrolyze trimyristin to myristic acid and wants to confirm if the reaction works. During the melting point measurement, a 50:50 (by weight) mixture of the starting trimyristin and the product myrsitic acid is found to have the same melting point as that of trimyristin, which statement is true? a) Trimyristin was not hydrolyzed to myristic acid b) Myristic acid was not hydrolyzed to trimyristin c) Trimyristin was hydrolyzed to myristic acid d) Myristic acid was not hydrolyzed to trimyristin e) It is hard to tell about the reaction course

answer

a) Trimyristin was not hydrolyzed to myristic acid

question

Which of the following is true about the synthesis of tert-butyl chloride? a) It is synthesized from 1-butanol b) It is synthesized via SN2 mechanism c) It is synthesized via SN1 mechanism d) It is synthesized via both SN1 and SN2 mechanism e) It is synthesized from a secoondary alcohol

answer

c) It is synthesized via SN1 mechanism

question

Which alkyl halide shall give a postive result upon reacting with AgNO3? a) Chlorobutane b) 2-chlorobutane c) 1-chloro-2-methylpropane d) 2-chloro-2-methylethane e)2,3-dimethylbutane

answer

d) 2-chloro-2-methylethane

question

Which types of alkyl halides shall readily react with NaI? a) Primary b) Secondary c) Teritary d) b and c e) a, b, and c

answer

a) Primary

question

What is the side reaction during the synthesis of ter-butyl chloride via SN1 reaction? a) 2-chloro-2-methylethane b) Chlorobutane c) 2-chlorobutane d) butene e) 2-methylpropene

answer

e) 2-methylpropene

question

How do you avoid the formation of the side product when synthesizing ter-butyl chloride via SN1 reaction? a) Drying the aqueous layer b) Neutralizing the organic layer c) Using silver nitrate d) Avoiding over heating e) b and c f) all except a

answer

d) Avoiding over heating

question

To which class of organic compounds does the side products of SN2 reaction belong to? a) Alkene b) Alkyne c) Alkane d) Quaternary Salt e) Alkyl Halide

answer

a) Alkene

question

In an Sn2 mechanism, the reaction of a tertiary amine with an alkyl halide will produce_________________? a) Primary halide b) Secondary halide c) Primary ammonium salt d) Tertiary ammonium salt e) Quarternary ammonium salt

answer

e) Quarternary ammonium salt

question

Which technique can be used to identify the relative amounts of each products when an alkene is synthesized from an alcohol. a) Simple distillation b) Column chromatography c) Gas chromatography d) Fractional Distillation e) Recrystalliztion

answer

c) Gas chromatography

question

Alcohols can be protonated to form a good leaving group called _________________? a) Ester b) Diol c) Water d) Acid e) Hydroxide

answer

c) Water

question

In converting alcohols o alkenes, which mechanism is utilize? a) SN1 b) SN2 c) E1 d) E2 e) c and d

answer

c) E1

question

Which of the following is considered a mobile phase in gas chromatography experiment? a) Celite packed in a stainless steel column b) He or N2 gas c) Solid material of high melting point packed in capillary column d) Solid alumina e) All except B

answer

b) He or N2 gas

question

What is true about retention time in a gas chromatography experiment? a) The most volatile compound has a lower retention time b) The least volatile compound has a lower retention time c) The major alkene has a lower retention time d) The minor alkene has a higher retention time e) A and D can be true

answer

a) The most volatile compound has a lower retention time

question

Which compounds can be used to identify ethene? a) Chromic acid b) Acetone c) Bromine d) Potassium permanganate e) Both c and d

answer

e) Both c and d

question

Which reagent will identify 1-butanol? a) CrO3/ H2SO4 b) Br2 c) Jones reagent d) 2,4-DNP e) A or C

answer

e) A or C

question

Which of the following compounds will convert a red solution of bromide to colorless? a) 1-methyl-1-cyclohex-1-ol b) Cyclohexone c) Cyclohexene d) Cyclohexoic acid e) Cyclohexane

answer

c) cyclohexene

question

Carbonyl is a chemical group that in acidic media combine with amine creating compounds known as _________ a) Alkenes b) Ketones and aldehydes c) Alcohols d) Esters e) Imines

answer

e) Imines

question

Which of the following reacts with 1,5-cyclooctadiene to produce the tricyclic desired product? a) Tetrachloromethylene b) Propionaldehyde c) Tetrachloroethylene d) Sodium trichloroacetate e) None of the above

answer

d) Sodium trichloroacetate

question

Which is not true about carbenes? a) They are reactive intermediates b) They act as electrophiles c) They act as nucleophiles d) They are generated in protic solvent e) All are true

answer

d) They are generated in protic solvent

question

How do you separate the desired product from the solvents in the experiment that focused on producing a tertachlorotricyclo product? a) Steam distillation b) Simple distillation c) Fractional distillation d) Recrystallization e) Vacuum evaporation

answer

a) Steam distillation

question

How do you avoid the potential side reaction in the reaction that focused on producing a tertachlorotricyclo product? a) Steam distillation b) Using protic solvents c) Using aprotic solvents d) Using carebenes e) Refluxing

answer

c) Using aprotic solvents

question

In Thin Layer Chromotography (TLC), what is the stationary phase?

answer

Silica gel (polar)

question

What is the mobile phase?

answer

It moves the sample

question

What is the enantiomer excess for pure R or S compounds?

answer

100%

question

What is the ee% for a racemic mixture?

answer

0%

question

What is the melting point range of pure substance?

answer

Short (2-3) and high

question

What is the range of a mixed melting point?

answer

Broad and lower

question

In gas chromatography, what is the stationary phase?

answer

Siloxanes (non-volatile)

question

In a Grignard reaction, what type of solvent should be used?

answer

Aprotic solvent

question

When is simple distillation used?

answer

Difference in BP is greater than 11C

question

When is fractional distillation used?

answer

Difference in BP is less than 11C

question

How do you calculate percent yield?

answer

(actual/ theoretical) x 100

question

Steam distillation

answer

Uses the BP of the solvent that you want to distillate. It is for temperature sensitive materials like natural aromatic compounds.

question

What is mixed melting point?

answer

A 50:50 mixture of both compound is made. If the MP if lower and broad; hydrolysis was successful.

question

How do you calculate Rf?

answer

(distance travelled by compound/ distance travelled by solvent)

question

What does extraction depends on?

answer

It is based on intermolecular forces

question

What are terpenes?

answer

Compounds made up of 2 or more 5 carbon units (isoprene)

question

%ee =

answer

([a] observed / [a] pure) x 100%

question

Refractive index correction

answer

n^t + 0.00045 (t- 20C)

question

What is the silver nitrate test for?

answer

To test for tertiary halides

question

What does the sodium iodide test test?

answer

It tests for primary halides.

question

What does heat induce?

answer

Elimination reactions

question

What are SN1 reaction?

answer

Unimolecular, 1 step, polar protic solvent

question

What are SN2 reaction?

answer

bimolecular, 2 step, polar aprotic solvent

question

Which reacts faster in an SN2 reaction: ethyldiisoproprlamine (EDA) and triethylamine (TEA)?

answer

triethylamine (TEA)

question

Gas chromotography

answer

If the column is polar, the non-polar component leaves first, the polar component interacts

question

In a qualitative test, how is the presence of alkenes tested?

answer

Potassium permanganate (produce muddy precipitate); bromine forms colorless solution

question

In a qualitative test, how is the presence of alcohols tested?

answer

Jones reagent (chromic acid-sulfuric acid)- changed to blue/green precipitate

question

In a qualitative test, how is the presence of carbonyls tested?

answer

2,4-dinotrophenylhydrazine (2,4-DNP)- forms yellow or orange precipitate

Organic Chemistry 1 Lab: Part 2 – Flashcards

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