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OrgChem Part 1&2 - 2023 Flashcards

1
Q
  1. Which of the following LEAST describes an organic compound?
    A. It always comes from a living source.
    B. It is composed of covalently bonded carbon atoms.
    C. Light molecular weight compounds are combustible.
    D. None of the above.
A

A. It always comes from a living source

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2
Q
  1. What is the hybridization of the carbonyl carbon in acetone, CH₃COCH₃?
    A. sp
    B. sp2
    C. sp3
    D. sp3d2
A

B. sp2

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2
Q
  1. The vital force theory was disproved by the synthesis of which compound?
    A. ethanol
    B. cyanide
    C. urea
    D. ammonia
A

C. urea

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2
Q
  1. Which of the following is NOT an aliphatic compound?
    A. neopentane
    B. cycloheptane
    C. 3-heptyne
    D. xylene
A

D. xylene

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2
Q
  1. Which of the following is a pair of stereoisomers?
    A. 2-octene and 3-octene
    B. D-glucose and L-gulose
    C. cis-2-butene and trans-2-butene
    D. hexanoic acid and heptanoic acid
A

C. cis-2-butene and trans-2-butene

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2
Q
  1. What is the common name for ethenylbenzene?
    A. styrene
    B. cumene
    C. xylene
    D. limonene
A

A. styrene

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3
Q
  1. Which is the most acidic among the following compounds?
    A. CH₃OH
    B. C₆H₅OH
    C. CH₃COOH
    D. (CH₃)₃COH
A

C. CH₃COOH

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3
Q
  1. The smell of rancid butter is due to the presence of butyric (butanoic) acid. What is the for
    this compound?
    A. C₄H₈O₂
    B. C₄H₁₀O
    C. C₅H₁₀O₂
    D. C₅H₁₂O
A

A. C₄H₈O₂

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3
Q
  1. Which of the following solvents will butyric acid be most soluble?
    A. CCl4
    B. water
    C. hexane
    D. CH₂Cl₂
A

B. water

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3
Q
  1. Among the ortho, meta and para isomers of xylene, which has the highest boiling point?
    A. ortho-xylene
    B. meta-xylene
    C. para-xylene
    D. ortho-xylene and para-xylene
A

A. ortho-xylene

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3
Q
  1. An unknown alcohol was reacted with the Lucas reagent and the observation was the
    immediate appearance of turbidity. Which type of alcohol was the unknown?
    A. primary
    B. secondary
    C. tertiary
    D. can be any
A

C. tertiary

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3
Q
  1. A stable light source in AAS analysis, which is necessary to emit the sharp characteristic
    spectrum of the element to be determined is called
    A. Tungsten Lamp
    B. Hollow Cathode Lamp
    C. Deuterium Lamp
    D. Nerst Blower
A

B. Hollow Cathode Lamp

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3
Q
  1. Which functional group is directly responsible for the flavors present in wine?
    A. ester
    B. ether
    C. alcohol
    D. anhydride
A

A. ester

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3
Q
  1. Which of the following is arranged in order of increasing boiling point?
    A. 2-methylbutane < n-pentane < butanone < butanol
    B. n-pentane < 2-methylbutane < butanone < butanol
    C. 2-methylbutane < n-pentane < butanol < butanone
    D. n-pentane < 2-methylbutane < butanol < butanone
A

A. 2-methylbutane < n-pentane < butanone < butanol

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3
Q
  1. Which of the following compounds is NOT produced from oxidation of alkenes?
    A. ester
    B. ketone
    C. carboxylic acid
    D. carbon dioxide
A

A. ester

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3
Q
  1. Which of the following is NOT a reagent for hydrogenation of an alkyne?
    A. H₂/Pd-C
    B. H2/Lindlar
    C. Na/NH₃
    D. BH₃/H₂O₂, NaOH
A

D. BH₃/H₂O₂, NaOH

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3
Q
  1. How many different alcohols have the molecular formula C₄H₁₀O?
    A. 2
    B. 4
    C. 3
    D. 5
A

B. 4

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4
Q
  1. What Is the hybridization of the carbon atom in a carboxyl group?
    A. sp
    B. sp3
    C. sp2
    D. dsp3
A

C. sp2

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4
Q
  1. A food scientist has a sample of a plant oil and wants to determine if the oil contains
    saturated or unsaturated fatty adds. Which of the following techniques would most useful for this
    purpose?
    A. Mass Spectroscopy
    B. Ultraviolet Spectroscopy
    C. Infrared Spectroscopy
    D. Visible Spectroscopy
A

C. Infrared Spectroscopy

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4
Q
  1. Which alkyl halide will most readily react in SN1 reactions?
    A. primary
    B. secondary
    C. tertiary
    D. can be any
A

C. tertiary

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4
Q
  1. Pyridinium cholorochromate (PCC) is a mild oxidizing agent. What is the product formed
    when 1-butanol reacts with PCC?
    A. butanal
    B. 2-butanone
    C. butanoic acid
    D. tert-butanol
A

A. butanal

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4
Q
  1. Which of the following can be done to purify a synthesized solid product?
    A. extraction
    B. distillation
    C. recrystallization
    D. chromatography
A

C. recrystallization

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4
Q
  1. In a calibration curve, absorbance is plotted against the _________ of an analyte.
    A. pH
    B. volume
    C. concentration
    D. redox potential
A

C. concentration

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4
Q
  1. The most appropriate technique to determine levels or the Pb²⁺ ion in blood is
    A. atomic absorption spectroscopy
    B. mass spectrometry
    C. infrared spectroscopy
    D. high-performance liquid chromatography
A

A. atomic absorption spectroscopy

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4
Q
  1. Which of the following shows the correct path of light travel in a spectrophotometer?
    A. monochromator – source – sample – detector
    B. source – monochromator – sample – detector
    C. monochromator – source – detector – sample
    D. source – monochromator – detector – sample
A

B. source – monochromator – sample – detector

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4
Q
  1. A graphical representation of measuring signal as a function of quantity of analyte is
    A. Absorbance chart
    B. Calibration curve
    C. Quality control chart
    D. none of the above
A

B. Calibration curve

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4
Q
  1. This method of distillation is suitable when the components of a mixture to be separated are
    thermal-sensitive and could decompose at high temperatures.
    A. steam distillation
    B. simple distillation
    C. fractional distillation
    D. none of the above
A

A. steam distillation

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4
Q
  1. Cuvettes made of this material are required when working at a wavelength below 300 nm
    where other materials show a significant absorption.
    A. quartz
    B. plastic
    C. sodium chloride
    D. potassium bromide
A

A. quartz

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4
Q
  1. This is done during liquid-liquid extraction to release the pressure build up inside the
    separatory funnel during shaking.
    A. stirring
    B. venting
    C. drawing
    D. salting out
A

B. venting

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5
Q
  1. What is the funnel used in suction filtration?
    A. filter funnel
    B. dropping funnel
    C. thistle funnel
    D. Büchner funnel
A

D. Büchner funnel

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5
Q
  1. What is the most appropriate type of container to be used for acid and base wastes?
    A. metal drums
    B. fiber drums
    C. polyethylene drums
    D. tightly-sealed glass container
A

C. polyethylene drums

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5
Q
  1. It is the more common form of high pressure liquid chromatography (HPLC) where the
    stationary phase is nonpolar and the mobile phase is polar.
    A. affinity
    B. exclusion
    C. normal-phase
    D. reversed-phase
A

D. reversed-phase

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5
Q
  1. In this chromatographic method, the sample may be gas or liquid injected into a gaseous
    mobile phase.
    A. gas chromatography
    B. affinity chromatography
    C. thin layer chromatography
    D. high pressure liquid chromatography
A

A. gas chromatograph

6
Q
  1. It is the highest concentration of a substance in the air that will produce a fire or explosion
    when source of ignition such as heat, spark or flame is present.
    A. lower flammable limit
    B. upper flammable limit
    C. reactivity limit
    D. flash limit
A

B. upper flammable limit

7
Q
  1. In an MSDS Data Sheet, which of the following color symbolizes reactivity?
    A. blue
    B. red
    C. yellow
    D. white
A

C. yellow

8
Q
  1. According to the GHS, which of the following is not under the pictogram “Gas Cylinder”?
    A. compressed gas
    B. dissolved gas
    C. liquefied gas
    D. explosive gas
A

D. explosive gas

9
Q
  1. Water is a suitable solvent for the recrystallization of benzoic acid. How should be addition of
    the solvent?
    A. Add benzoic acid to minimum amount of hot water with stirring.
    B. Add room temp water to benzoic acid while stirring until benzoic acid dissolves.
    C. Add maximum amount of hot water to benzoic acid while stirring.
    D. Add small portions of hot water to benzoic acid while stirring until benzoic acid dissolves.
A

D. Add small portions of hot water to benzoic acid while stirring until benzoic acid dissolves.

9
Q
  1. Sample preparation technique used prior to instrumental analysis of metals.
    A. sieving
    B. clean-up
    C. acid digestion
    D. liquid-liquid extraction
A

C. acid digestion

10
Q
  1. The organic liquid in steam distillation vaporizes at
    A. a lower temperature than its boiling point
    B. a higher temperature than its boiling point
    C. its boiling point
    D. none of the above
A

A. a lower temperature than its boiling point

10
Q
  1. Retardation factor is the ratio of
    A. distance moved by substance from base line to distance moved by the solvent from base line
    B. distance moved by solvent from base line to distance moved by the substance from base line
    C. distance moved by substance from top line to distance moved by the solvent from top line
    D. distance moved by solvent from top line to distance moved by the substance from top line
A

A. distance moved by substance from base line to distance moved by the solvent from base line

11
Q
  1. The chromaplate or thin layer chromatography plate is made up of ______.
    A. glass
    B. wood
    C. fiber
    D. metal
A

A. glass

11
Q
  1. Which of the following is FALSE regarding galvanic cells?
    A. To set up this cell, a salt bridge is used.
    B. The reactions taking place are non-spontaneous.
    C. It converts chemical energy into electrical energy.
    D. The electrolytes used in the compartments are different.
A

B. The reactions taking place are non-spontaneous.

11
Q
  1. A simple fractional tube is packed with which of the following?
    A. wooden beads
    B. plastic beads
    C. metal beads
    D. glass beads
A

D. glass beads

12
Q
  1. Which of the following is the principle of Atomic Absorption Spectroscopy?
    A. Color is measured.
    B. Color is simply observed.
    C. Medium absorbs radiation and transmitted radiation is measured.
    D. Radiation is absorbed by non-excited atoms in vapor state and are excited to higher states.
A

D. Radiation is absorbed by non-excited atoms in vapor state and are excited to higher states.

12
Q
  1. A cell is prepared by dipping a copper rod in 1 M CuSO₄ solution and an iron rod in 2 M
    FeSO₄ solution. Identify the anode and cathode.
    A. anode-copper; cathode-iron
    B. anode-iron; cathode-copper
    C. anode-copper; cathode-copper
    D. anode-iron; cathode-iron
A

B. anode-iron; cathode-copper

12
Q
  1. Beer’s Law states that
    A. absorbance is proportional to both the path length and concentration of the absorbing species
    B. absorbance is proportional to the log of the concentration of the absorbing species
    C. absorbance is equal to P0/P
    D. none of the above
A

A. absorbance is proportional to both the path length and concentration of the absorbing species

12
Q
  1. Which of the following columns are not used in liquid or high performance liquid
    chromatography?
    A. guard column
    B. capillary column
    C. analytical column
    D. separation column
A

B. capillary column

12
Q
  1. Which of the following statements about mass spectroscopy is(are) correct?
    I.
    Analyte molecules are converted to gaseous ions.
    II. The ions are separated according to their mass to charge ratio.
    III. The addition of compound identification mass spectra can be utilized to determine precise
    isotopic masses and isotopic ratios.
    A. II only
    B. I and III
    C. II and III
    D. I, II, and III
A

D. I, II, and III

13
Q
  1. Which of the following is widely used for the separation/purification of specific
    biomolecules? This relies on the highly specific binding between an analyte and its counterpart.
    A. Chiral chromatography
    B. Affinity chromatography
    C. Ion exchange chromatography
    D. Ion exclusion chromatography
A

B. Affinity chromatography

13
Q
  1. Which of the following detectors is widely used to detect environmental samples like
    chlorinated pesticides and polychlorinated biphenyls?
    A. Flame ionization detector
    B. Electron capture detector
    C. Thermionic specific detector
    D. Thermal conductivity detector
A

B. Electron capture detector

13
Q
  1. Which of the following is(are) application(s) of ion exchange chromatography?
    A. Softening of hard water
    B. Demineralization of water
    C. Separation and determination of anions
    D. All of the above
A

D. All of the above

13
Q
  1. Which of the following is NOT an ideal characteristic of a detector used in gas
    chromatography?
    A. high reliability
    B. short response time
    C. linear response to the solutes
    D. sensitive to the changes in the flow rate of a carrier gas
A

D. sensitive to the changes in the flow rate of a carrier gas

13
Q
  1. The region of electromagnetic spectrum for NMR is
    A. IR
    B. UV-Vis
    C. Microwave
    D. Radio frequency
A

D. Radio frequency

14
Q
  1. Which of the following is NOT true about the guard column used in liquid chromatography?
    A. It extends the lifespan of the separation column.
    B. It filters particles that clog the separation column.
    C. The size of packing varies with the type of protection needed.
    D. It allows entry of particles that cause precipitation upon contact with stationary or mobile
    phase.
A

D. It allows entry of particles that cause precipitation upon contact with stationary or mobile
phase.

14
Q
  1. What must be done to the solid samples for it to be introduced into the column without using
    solid injection syringes in gas chromatography?
    A. dissolved in volatile liquids
    B. introduced using sampling loops
    C. introduced using rotary sample valve
    D. introduced in hot-zone of the column
A

A. dissolved in volatile liquids

14
Q
  1. Which of the following colors used on the NFPA diamond chemical hazard warning label
    represents the health hazard?
    A. Red
    B. Blue
    C. Yellow
    D. White
A

B. Blue

14
Q
  1. Chlorination of alkanes is what type of reaction?
    A. elimination
    B. rearrangement
    C. electrophilic addition
    D. free-radical substitution
A

D. free-radical substitution

14
Q
  1. Segregation of waste organic solvents is very important because
    A. The costs for disposal of waste solvents differ.
    B. Some waste solvents can still be recycled.
    C. Waste solvents differ in proper treatment.
    D. All of the given answers
A

D. All of the given answers

15
Q
  1. Which treatment method is NOT typically used to remove organic compounds?
    A. Thermal
    B. Biological
    C. Physical
    D. Chemical
A

A. Thermal

15
Q
  1. Which is the correct procedure for mixing acid and water?
    A. Pour acid into water
    B. Pour them at the same time
    C. Pour water into acid
    D. Let the supervisor pour them
A

A. Pour acid into water

15
Q
  1. Which method is considered an unacceptable means of disposing waste?
    A. All methods given are unacceptable
    B. Pouring down the sink
    C. Placing in the regular trash
    D. Pouring down the drainage canal
A

A. All methods given are unacceptable

15
Q
  1. Organic peroxides are particularly dangerous when
    A. Concentrated
    B. All of the given answers
    C. When ethyl ether or tetrahydrofuran is left open to the air md allowed to evaporate
    D. Heated
A

B. All of the given answers

15
Q
  1. Baeyer’s reagent is used to characterize alkenes. Which of the following is Baeyer’s reagent?
    A. Neutral solution of HCl
    B. Alcoholic solution of carbonate
    C. Ammoniacal solution of silver nitrate
    D. Aqueous solution of potassium permanganate
A

D. Aqueous solution of potassium permanganate

16
Q
  1. Electrophiles are
    A. electron-poor species
    B. electron-rich species
    C. positively charged ions
    D. electrically neutral species
A

A. electron-poor species

16
Q
  1. In what way does the reactivity of CH₃C≡CH differ from CH₃CH=CH₂?
    A. Propyne is deprotonated by NaNH₂, while propene is not.
    B. Propyne does not react with bromine, while propene reacts readily with bromine.
    C. Propyne undergoes catalytic hydrogenation over platinum, while propene does not.
    D. Propyne is readily hydrated at pH = 0, while propene is not.
A

A. Propyne is deprotonated by NaNH₂, while propene is not.

16
Q
  1. Which compound will rapidly decolorize Br₂ in CHCl₃?
    A. hexane
    B. benzene
    C. 1-hexene
    D. cyclohexane
A

C. 1-hexene

16
Q
  1. Which of these compounds exist as cis and trans isomers?
    A. dichlorobenzene
    B. 1-chloropropene
    C. dichloroethyne
    D. 1,2-dichloropropane
A

B. 1-chloropropene

16
Q
  1. Which of the following is an aromatic compound?
    A. acetylene
    B. acetone
    C. styrene
    D. polyethylene
A

C. styrene

16
Q
  1. Which of the following alkyl halides can undergo both SN1 and SN2 reactions?
    A. CH₃X
    B. (CH₃)₂CHX
    C. (CH₃)₃CX
    D. (CH₃)₃CCH₂X
A

B. (CH₃)₂CHX

17
Q
  1. How many σ and 𝜋 bonds are present in benzene?
    A. 6 σ and 3 𝜋
    B. 3 σ and 6 𝜋
    C. 3 σ and 12 𝜋
    D. 12 σ and 3 𝜋
A

D. 12 σ and 3 𝜋

17
Q
  1. Which of the following is the most activating in electrophilic aromatic substitution?
    A. -NO₂
    B. -NHCOCH₃
    C. -CN
    D. -NH₂
A

D. -NH₂

17
Q
  1. Which of the following is the rate determining step in electrophilic aromatic substitution?
    A. generation of the electrophile
    B. addition of the electrophile on benzene’s 𝜋 bond to form a carbocation
    C. loss of a proton to re
A

B. addition of the electrophile on benzene’s 𝜋 bond to form a carbocation

17
Q
  1. Alkyl halides are very reactive towards nucleophiles because
    A. they have a nucleophilic carbon and a good leaving group.
    B. they have a nucleophilic carbon and a poor leaving group.
    C. they have an electrophilic carbon and a good leaving group.
    D. they have an electrophilic carbon and a poor leaving group.
A

C. they have an electrophilic carbon and a good leaving group.

17
Q
  1. Which of the following CANNOT be a product of the reaction of benzene with CH₃Cl and
    AlCl₃?
    A. toluene
    B. isopropyl benzene
    C. o-xylene
    D. p-xylene
A

B. isopropyl benzene

18
Q
  1. SN2 means
    A. two-step nucleophilic substitution involving both alkyl halide and nucleophile
    B. one-step nucleophilic substitution involving both alkyl halide and nucleophile
    C. two-step nucleophilic substitution involving only the alkyl halide
    D. one-step nucleophilic substitution involving only the nucleophile
A

B. one-step nucleophilic substitution involving both alkyl halide and nucleophile

18
Q
  1. What of the following reactions are favored by polar aprotic solvent?
    A. Both SN1 and SN2 reactions
    B. SN1 reactions
    C. None of the given choices
    D. SN2 reactions
A

D. SN2 reactions

19
Q
  1. Carbon is found in the highest oxidation state in which of these classes of organic
    compounds?
    A. alkynes
    B. alcohols
    C. aldehydes
    D. carboxylic acids
A

C. aldehydes
D. carboxylic acids

19
Q
  1. Which compound has the highest boiling point?
    A. CH₃CH₂CH₃
    B. CH₃OCH₂CH₃
    C. CH₃COCH₃
    D. CH₃CH₂CH₂OH
A

D. CH₃CH₂CH₂OH

20
Q
  1. Which of the following reactions will NOT produce aldehydes?
    A. ozonolysis of alkenes
    B. hydration of alkynes
    C. oxidation of primary alcohols
    D. dehydration of secondary alcohols
A

D. dehydration of secondary alcohols

21
Q
  1. Which reaction could occur between acetic acid and ethanol?
    A. addition
    B. esterification
    C. neutralization
    D. oxidation
A

B. esterification

22
Q
  1. Which of the following reagents can be used to distinguish between phenol and carboxylic
    acid?
    A. aqueous NaCl
    B. aqueous NaOH
    C. aqueous FeCl₃
    D. Tollens reagent
A

C. aqueous FeCl₃

asd (9 decks)

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