Which of the following is not part of Photosynthesis?

Which of the following is not part of Photosynthesis?

a) Light reactions
b) Carbon reactions
c) Thylakoid membrane
d) CO2 Supply process


Answer: c) Thylakoid membrane

The dormancy breaking mechanism of an immature embryo requires:

The dormancy breaking mechanism of an immature embryo requires:

a) cold temperatures for germination.
b) water to stimulate embryo growth.
c) further embryo development under dry conditions.
d) scarification to break the seed coat.


Answer: c) further embryo development under dry conditions.

Which of the following statements best applies to Eukaryotes?

Which of the following statements best applies to Eukaryotes?

a) Represent the earliest life forms
b) Cells lack membrane bound organelles
c) Are single celled organisms
d) Have a true nucleus


Answer: d) Have a true nucleus

A plant tissue that is involved in structural rigidity in young plants is:

A plant tissue that is involved in structural rigidity in young plants is:

a) Phloem
b) Parenchyma
c) Cambium
d) Collenchyma


Answer: d) Collenchyma

The base temperature is normally calculated as the temperature at which:

The base temperature is normally calculated as the temperature at which:

a) growth rate is at an optimum.
b) photosynthesis changes to photorespiration.
c) frost damage occurs to the plant.
d) the rate of plant development is zero.


Answer: d) the rate of plant development is zero.

A mycorrhiza is a symbiotic association between a higher plant root and a:

A mycorrhiza is a symbiotic association between a higher plant root and a:

a) Bacterium
b) Virus
c) Fungus
d) Alga


Answer: c) Fungus

Which of the following statements about phloem is NOT correct?

Which of the following statements about phloem is NOT correct?

a) Contains sap that travels from a sugar source to a sugar sink
b) Water movement is driven by negative pressure
c) Contains live cells
d) Transports the products of photosynthesis by the process of translocation


Answer: b) Water movement is driven by negative pressure

The word 'phyllotaxy' refers to the:

The word 'phyllotaxy' refers to the:

a) air spaces for internal ventilation in leaves.
b) arrangement of leaves on a stem.
c) sloughing off of root cap cells.
d) protective covering on bud scales.


Answer: b) arrangement of leaves on a stem.

Collenchyma cells can best be described as:

Collenchyma cells can best be described as:

a) Non-living with thick walls impregnated with lignin
b) Living, roughly round in cross section, with little structural specialism
c) Narrow and elongated in shape, with additional thickening in cell corners
d) Living, with fibres in their wall to communicate with adjacent cells


Answer: c) Narrow and elongated in shape, with additional thickening in cell corners

A plant that is dioecious can be described as having:

A plant that is dioecious can be described as having:

a) flower parts in multiples of three.
b) flowers with a combination of male and female parts.
c) only male or female flowers.
d) flower parts in multiples of four or fives.

Answer: b) flowers with a combination of male and female parts.

The major transport pathway of sugars and amino acids from shoot to root is the:

The major transport pathway of sugars and amino acids from shoot to root is the:

a) Xylem
b) Cuticle
c) Phloem
d) Petiole


Answer: c) Phloem

Lucerne (Medicago sativa) is:

Lucerne (Medicago sativa) is:

a) A perennial legume pasture species
b) Drought tolerant due to rhizomes
c) An annual legume pasture species
d) Susceptible to summer drought


Answer: a) A perennial legume pasture species

In a flower, the Carpel (Pistil) consists of a:

In a flower, the Carpel (Pistil) consists of a:

a) Stigma, style, ovary and ovule
b) Anther, stigma, filament and ovary
c) Stigma, filament, style and ovule
d) Filament, anther, ovule and style


Answer: a) Stigma, style, ovary and ovule

In a flower, the stamen consists of a:

In a flower, the stamen consists of a:

a) Stigma and style
b) Anther and stigma
c) Stigma and filament
d) Filament and anther


Answer: d) Filament and anther

The tissue, cambium, which allows for increased girth of eudicotyledons when they undergo secondary thickening, is located:

The tissue, cambium, which allows for increased girth of eudicotyledons when they undergo secondary thickening, is located:

a) in the vascular bundles to the outside of the phloem.
b) in the vascular bundles between the xylem and phloem.
c) at the apical meristem.
d) in the vascular bundles inside the xylem.


Answer: b) in the vascular bundles between the xylem and phloem.

For a cultivar to be protected by Plant Breeders Rights it needs to undergo the DUS test. DUS means:

For a cultivar to be protected by Plant Breeders Rights it needs to undergo the DUS test. DUS means:

a) Desirable, Uniform, Suitable
b) Distinct, Uniform, Stable
c) Desirable, Unique, Stable
d) Distinct, Unique, Suitable


Answer: b) Distinct, Uniform, Stable

The correct order of five taxa used in classification is:

The correct order of five taxa used in classification is:

a) Genus, class, division, family, order
b) Family, genus, division, class, kingdom
c) Kingdom, division, class, family, species
d) Division, kingdom, family, order, genus


Answer: c) Kingdom, division, class, family, species

In grasses, the role of the scutellum is to:

In grasses, the role of the scutellum is to:

a) protect the emerging plumule.
b) protect the emerging radical.
c) transfer the energy from the endosperm to the embryo.
d) transfer pollen from the anther to the stigma.


Answer: c) transfer the energy from the endosperm to the embryo.

Maize reduces self-fertilisation by:

Maize reduces self-fertilisation by:

a) being monoecious.
b) being dioecious.
c) being self-incompatible.
d) having different stamen and style maturation time.


Answer: c) being self-incompatible.

Which of the following is unlikely to occur in a plant which receives additional nitrogen (N) when growing in low N soil?

Which of the following is unlikely to occur in a plant which receives additional nitrogen (N) when growing in low N soil?

a) Nitrogen content of the plant increases
b) Root to shoot ratio increases
c) Fresh weight to dry weight ratio increases
d) Growth rate increases


Answer: b) Root to shoot ratio increases

Which of the following is the most important change that occurred as plants became better adapted to dry land?

Which of the following is the most important change that occurred as plants became better adapted to dry land?

a) Gametophyte becomes more dominant
b) Vascular systems develop
c) The fern prothallus develops a cuticle
d) Bryophytes such as mosses develop true leaves


Answer: a) Gametophyte becomes more dominant?

Transpiration in plants involves all of the following except:

Transpiration in plants involves all of the following except:

a) Adhesion of water molecules to cell walls
b) Cohesion among water molecules
c) Water transport through phloem cells
d) Movement of water molecules through stomata


Answer: c) Water transport through phloem cells

Which one of the following statements is NOT true?

Which one of the following statements is NOT true?

a) Phtosynthesis occurs in chloroplasts
b) DNA replication occurs in vacuoles
c) Protein synthesis occurs in ribosomes
d) Respiration occurs in mitochondria


Answer: b) DNA replication occurs in vacuoles

Which of the following is NOT part of cellular respiration?

Which of the following is NOT part of cellular respiration?

a) Glycolysis
b) The citric acid cycle
c) Oxidative phosphorylation
d) Thylakoid membranes


Answer: d) Thylakoid membranes

The plant hormone ethylene can be used to

The plant hormone ethylene can be used to

a) increase grass growth.
b) kill broadleaf weeds.
c) prevent reproductive growth.
d) control fruit ripening.


Answer: d) control fruit ripening.

The conversion of atmospheric nitrogen to organic nitrogen via ammonium by microorganisms is called

The conversion of atmospheric nitrogen to organic nitrogen via ammonium by microorganisms is called

a) Nitrification
b) Ammonification
c) Nitrogen fixation
d) Protein synthesis


Answer: c) Nitrogen fixation

A leaf stalk is called a:

A leaf stalk is called a:

a) Coleoptile
b) Stipule
c) Lamina
d) Petiole


Answer: d) Petiole

Chicory (Cichorium intybus) is a member of which family?

Chicory (Cichorium intybus) is a member of which family?

a) Poaceae
b) Fabaceae
c) Brassicaceae
d) Asteraceae


Answer: d) Asteraceae

Which of the following is likely to be the major form of nitrogen taken up by plants in disturbed/cultivated soils?

Which of the following is likely to be the major form of nitrogen taken up by plants in disturbed/cultivated soils?

a) nitrate (NO3-)
b) nitrite (NO2-)
c) ammonium (NH4+)
d) urea (CO(NH2)2)


Answer: a) nitrate (NO3-)

The function of the coleorhiza is to:

The function of the coleorhiza is to:

a) prevent water entering the stem.
b) transfer nutrients to the embryo.
c) protect the emerging radicle.
d) protect the emerging plumule.


Answer: c) protect the emerging radicle.

The correct order for terms to describe plant life cycles from the longest to the shortest is:

The correct order for terms to describe plant life cycles from the longest to the shortest is:

a) Perennial, annual, biennial, diurnal
b) Annual, biennial, millennium, perennial
c) Eternal, annual, biennial, diurnal
d) Perennial, biennial, annual, ephemeral


Answer: d) Perennial, biennial, annual, ephemeral

What is the primary function of the Calvin cycle?

What is the primary function of the Calvin cycle?

a) Synthesizes sugars from CO2
b) Uses NAHPH to release CO2
c) Splits water and releases O2
d) Synthesizes proteins


Answer: a) Synthesizes sugars from CO2

Hybrid cultivar seed:

Hybrid cultivar seed:

a) is the F1 generation of inbred parents.
b) should be stored and grown the next year.
c) is developed by inbreeding.
d) is genetically engineered.


Answer: a) is the F1 generation of inbred parents.

A seed can be characterised as having:

A seed can be characterised as having:

a) a high respiration rate and low water content.
b) a low respiration rate and low water content.
c) a low respiration rate and high water content.
d) a high respiration rate and high water content.


Answer: b) a low respiration rate and low water content

Which of the following essential elements for plant growth would be needed in the least quantity for plant development?

Which of the following essential elements for plant growth would be needed in the least quantity for plant development?

a) Iron
b) Nitrogen
c) Oxygen
d) Hydrogen


Answer: a) Iron

Plant cells have plasmodesmata which:

Plant cells have plasmodesmata which:

a) store various pigments.
b) synthesise proteins on the endoplasmic reticulum.
c) allow cytoplasm to pass through walls.
d) modify vesicles of the endoplasmic reticulum.


Answer: c) allow cytoplasm to pass through walls.

The pigment which senses photoperiod by absorbing red light is:

The pigment which senses photoperiod by absorbing red light is:

a) Chlorophyll
b) Ribosome
c) Phytochrome
d) Chromoplast


Answer: c) Phytochrome

Which of the following sequences correctly represent the flow of electrons during the light reactions of photosynthesis?

Which of the following sequences correctly represent the flow of electrons during the light reactions of photosynthesis?

a) NADPH → O2 → CO2
b) H2O → electron transport chain → NADPH
c) NADPH → photosystem II → Calvin cycle
d) Photosystem I → photosystem II → H2O


Answer: b) H2O → electron transport chain → NADPH

The function of the coleoptile is to:

The function of the coleoptile is to:

a) prevent water entering the stem.
b) transfer nutrients to the embryo.
c) protect the emerging plumule.
d) secrete amylase.


Answer: c) protect the emerging plumule.

The proportion of atmospheric gas as CO2 is approximately

The proportion of atmospheric gas as CO2 is approximately

a) 4%
b) 0.4%
c) 0.04%
d) 0.004%


Answer: c) 0.04%

If the maximum temperature was 25°C and the minimum was 15°C, how much thermal time has accumulated for a crop with a base temperature of 8°C?

If the maximum temperature was 25°C and the minimum was 15°C, how much thermal time has accumulated for a crop with a base temperature of 8°C?

a) 10
b) 11
c) 12
d) 13


Answer: c) 12

Double fertilisation occurs in:

Double fertilisation occurs in:

a) Conifers
b) Moss and liverworts
c) Ferns and fern allies
d) Flowering plants


Answer: d) Flowering plants

Alkaloids, like morphine, caffeine, nicotine and cocaine, are heterocyclic

Alkaloids, like morphine, caffeine, nicotine and cocaine, are heterocyclic

A) amines.
B) amides.
C) ethers.
D) esters.


Answer: A) amines.

Organic compounds with rings that contain atoms other than carbon are called

Organic compounds with rings that contain atoms other than carbon are called

A) aromatic compounds.
B) heterocyclic compounds.
C) heterogeneous compounds.
D) perfluoro compounds.


Answer: B) heterocyclic compounds.

Which of the following families of organic compounds does NOT contain an oxygen atom?

Which of the following families of organic compounds does NOT contain an oxygen atom?

A) alcohol
B) amine
C) carboxylic acid
D) ketone


Answer: B) amine

Amino acids are the "building blocks" of

Amino acids are the "building blocks" of

A) carbohydrates.
B) fats.
C) proteins.
D) vitamins.


Answer: C) proteins.

Amino acids are multifunctional compounds that contain

Amino acids are multifunctional compounds that contain

A) carboxyl and amine groups.
B) carboxyl and amide groups.
C) ester and amine groups.
D) aldehyde and amide groups.


Answer: A) carboxyl and amine groups.

The reaction between a carboxylic acid and an amine yields a(n)

The reaction between a carboxylic acid and an amine yields a(n)

A) aldehyde.
B) amide.
C) ester.
D) ketone.


Answer: B) amide.

Amines are

Amines are

A) acidic.
B) basic.
C) neutral.
D) variable with respect to acid/base behavior.


Answer: B) basic.

When an amine dissolves in water the pH of the solution will be

When an amine dissolves in water the pH of the solution will be

A) < 7.
B) = 7.
C) > 7.
D) More information is needed to predict pH.


Answer: C) > 7.

The compound (CH3)3N is called

The compound (CH3)3N is called

A) methylamine.
B) dimethylamine.
C) trimethylamine.
D) methyl ammonia.


Answer: C) trimethylamine.

The compound CH3NH2 is called

The compound CH3NH2 is called

A) methylamine.
B) dimethylamine.
C) trimethylamine.
D) methyl ammonia.


Answer: A) methylamine.

Amines are derivatives of

Amines are derivatives of

A) ammonia.
B) methane.
C) water.
D) amino acids.


Answer: A) ammonia.

A green chemistry improvement for the synthesis of Zoloft, an antidepressant, was the substitution of ________ for less environmentally-friendly solvents.

A green chemistry improvement for the synthesis of Zoloft, an antidepressant, was the substitution of ________ for less environmentally-friendly solvents.

A) ethanol
B) toluene
C) hexane
D) dichloromethane


Answer: A) ethanol

Esters are often used as

Esters are often used as

A) anesthetics.
B) disinfectants.
C) fragrances.
D) insecticides.


Answer: C) fragrances.

Many of the flavors isolated from foods are

Many of the flavors isolated from foods are

A) carboxylic acids.
B) esters.
C) alcohols.
D) ketones.


Answer: B) esters.

Vinegar is a solution of ________ in water.

Vinegar is a solution of ________ in water.

A) acetic acid
B) butyric acid
C) formic acid
D) proprionic acid


Answer: A) acetic acid

The general formula for a carboxylic acid is

The general formula for a carboxylic acid is

A) ROR'.
B) RCOOH.
C) RCOR'.
D) RCOOR'.


Answer: B) RCOOH.

The -COOH group represents the

The -COOH group represents the

A) carboxyl group.
B) carbonyl group.
C) alcohol group.
D) aldehyde group.


Answer: A) carboxyl group.

Aldehydes and ketones share a common functional group. The group is the

Aldehydes and ketones share a common functional group. The group is the

A) hydroxyl group.
B) phenol group.
C) ether group.
D) carbonyl group.


Answer: D) carbonyl group.

The abbreviation ROR' is used to represent the general formula of a(n)

The abbreviation ROR' is used to represent the general formula of a(n)

A) ether.
B) alcohol.
C) ester.
D) phenol.


Answer: A) ether.

Compounds that have two alkyl groups attached to an oxygen atom are called

Compounds that have two alkyl groups attached to an oxygen atom are called

A) alcohols.
B) phenols.
C) esters.
D) ethers.


Answer: D) ethers.

Phenol, sometimes called carbolic acid, was the first

Phenol, sometimes called carbolic acid, was the first

A) anesthetic.
B) antiseptic.
C) insecticide.
D) analgesic.


Answer: B) antiseptic.

A phenol has a(n) ________ group attached to a benzene ring.

A phenol has a(n) ________ group attached to a benzene ring.

A) amino
B) carbonyl
C) carboxyl
D) hydroxyl


Answer: D) hydroxyl

Phenols are often used as

Phenols are often used as

A) anesthetics.
B) disinfectants.
C) fragrances.
D) insecticides.


Answer: B) disinfectants.

Compounds with a hydroxyl group attached directly to a benzene ring are called

Compounds with a hydroxyl group attached directly to a benzene ring are called

A) alcohols.
B) aromatic hydrocarbons.
C) ethers.
D) phenols.


Answer: D) phenols.

A homologous series of alcohols contains

A homologous series of alcohols contains

A) the same number of carbon atoms, but a different number of hydroxyl groups.
B) the same number of carbon atoms and the same number of hydroxyl groups.
C) a different number of carbon atoms, but the same number of hydroxyl groups.
D) only isomers.


Answer: C) a different number of carbon atoms, but the same number of hydroxyl groups.

Which substance causes fetal alcohol syndrome?

Which substance causes fetal alcohol syndrome?

A) CH3OH
B) CH3CH2OH
C) CH3CHOHCH3
D) CH3OCH3


Answer: B) CH3CH2OH

Excessive ingestion of ethanol over a long period may cause which of the following?

Excessive ingestion of ethanol over a long period may cause which of the following?

A) physiological addiction
B) memory loss
C) deterioration of the liver
D) all of the above


Answer: D) all of the above

The intoxicating alcohol in "alcoholic" beverages is

The intoxicating alcohol in "alcoholic" beverages is

A) ethanol.
B) methanol.
C) propanol.
D) a mixture of the above


Answer: A) ethanol.

The formula of methanol is

The formula of methanol is

A) COH.
B) CHOH.
C) CH2OH.
D) CH3OH.


Answer: D) CH3OH.

Alcohols are characterized by which functional group?

Alcohols are characterized by which functional group?

A) hydroxyl
B) carboxyl
C) halide
D) ester


Answer: A) hydroxyl

The parts of organic molecules that give compounds characteristic chemical and physical properties are known as

The parts of organic molecules that give compounds characteristic chemical and physical properties are known as

A) alkyl groups.
B) aromatic groups.
C) functional groups.
D) hydrocarbon groups.


Answer: C) functional groups.

In organic chemistry, compounds are generally classified by

In organic chemistry, compounds are generally classified by

A) state.
B) functional group.
C) color.
D) odor.


Answer: B) functional group.

In representing the general formula of various functional groups, the symbol R stands for

In representing the general formula of various functional groups, the symbol R stands for

A) a halogen atom.
B) a ring.
C) an aromatic group.
D) an alkyl group


Answer: D) an alkyl group.

With respect to reactivity on the surface of the earth, chlorofluorocarbons are

With respect to reactivity on the surface of the earth, chlorofluorocarbons are

A) very reactive.
B) very unreactive.
C) moderately reactive.
D) variable depending upon the chlorofluorocarbon.


Answer: B) very unreactive.

In general, CFCs are

In general, CFCs are

A) solids with high melting points.
B) solids with low melting points.
C) liquids with high boiling points.
D) gases or liquids with low boiling points.


Answer: D) gases or liquids with low boiling points.

Chlorinated hydrocarbons, such as carbon tetrachloride CCl4, make good dry cleaning solvents because

Chlorinated hydrocarbons, such as carbon tetrachloride CCl4, make good dry cleaning solvents because

A) they dissolve in water.
B) they dissolve water insoluble stains, like grease and oil.
C) they are not liquids at room temperature.
D) they cause no significant health problems.


Answer: B) they dissolve water insoluble stains, like grease and oil.

A molecular formula of an aromatic hydrocarbon is

A molecular formula of an aromatic hydrocarbon is

A) C7H16.
B) C9H18.
C) C5H8.
D) C6H6.


Answer: D) C6H6.

Organic compounds that contain a benzene ring or possess certain properties similar to those of benzene are called ________ compounds.

Organic compounds that contain a benzene ring or possess certain properties similar to those of benzene are called ________ compounds.

A) alkaloid
B) acidic
C) aromatic
D) saturated


Answer: C) aromatic

The correct structure for benzene was proposed by ________ in 1865.

The correct structure for benzene was proposed by ________ in 1865.

A) Boyle
B) Kekule
C) Faraday
D) Curie


Answer: B) Kekule

Benzene is an unsaturated hydrocarbon. An interesting property of benzene is that

Benzene is an unsaturated hydrocarbon. An interesting property of benzene is that

A) it is a liquid at room temperature.
B) it does not undergo the same reactions that other unsaturated hydrocarbons do.
C) it contains only carbon and hydrogen.
D) it has a ring of carbon atoms in its structure.


Answer: B) it does not undergo the same reactions that other unsaturated hydrocarbons do.

The formula of benzene is

The formula of benzene is

A) C2H2.
B) C4H4.
C) C6H6.
D) C6H12.


Answer: C) C6H6.

Which of the following is an alkane?

Which of the following is an alkane?

A) propene
B) propyne
C) propane
D) xylene


Answer: C) propane

Which of the following is an alkyne?

Which of the following is an alkyne?

A) propene
B) propyne
C) propane
D) xylene


Answer: B) propyne

Which of the following is an alkene?

Which of the following is an alkene?

A) propene
B) propyne
C) propane
D) xylene


Answer: A) propene

A molecular formula of an alkyne is

A molecular formula of an alkyne is

A) C7H16.
B) C9H18.
C) C5H8.
D) C6H6.


Answer: C) C5H8.

A molecular formula of an alkene is

A molecular formula of an alkene is

A) C7H16.
B) C9H18.
C) C5H8.
D) C6H6.


Answer: B) C9H18.

Which of the following compounds is saturated?

Which of the following compounds is saturated?

A) butene
B) butane
C) propyne
D) butadiene


Answer: B) butane

The hydrocarbon that is used in torches along with oxygen to produce very hot flames for cutting and welding is

The hydrocarbon that is used in torches along with oxygen to produce very hot flames for cutting and welding is

A) ethylene.
B) methane.
C) propane.
D) acetylene.


Answer: D) acetylene.

The formula for propyne is

The formula for propyne is

A) C3H6.
B) C3H4.
C) C3H8.
D) C3H3.


Answer: B) C3H4.

A cyclic hydrocarbon containing seven carbon atoms and two double bonds will have the formula

A cyclic hydrocarbon containing seven carbon atoms and two double bonds will have the formula

A) C7H16.
B) C7H14.
C) C7H12.
D) C7H10.


Answer: D) C7H10.

A cyclic hydrocarbon containing six carbon atoms and one double bond will have the formula

A cyclic hydrocarbon containing six carbon atoms and one double bond will have the formula

A) C6H16.
B) C6H14.
C) C6H12.
D) C6H10.


Answer: D) C6H10.

The most important commercial organic compound is

The most important commercial organic compound is

A) methane, CH4.
B) ethane, CH3CH3.
C) ethylene, CH2CH2.
D) propane, CH3CH2CH3.


Answer: C) ethylene, CH2CH2.

Which of the following compounds is a homolog of CH2=CH2?

Which of the following compounds is a homolog of CH2=CH2?

A) CH3CH3
B) CH3CH2CH3
C) CH3CH=CH2
D) CH3CCH


Answer: C) CH3CH=CH2

Propane, benzene, acetylene, and 2-butene are all examples of

Propane, benzene, acetylene, and 2-butene are all examples of

A) alkenes.
B) alkanes.
C) aromatic compounds.
D) hydrocarbons.


Answer: D) hydrocarbons.

What is the general formula for a cycloalkane?

What is the general formula for a cycloalkane?

A) CnHn
B) CnH2n+2
C) CnH2n-2
D) CnH2n


Answer: D) CnH2n

The chemical formula of cyclopentane is

The chemical formula of cyclopentane is

A) C5H6.
B) C5H8.
C) C5H10.
D) C5H12.


Answer: C) C5H10.

The chemical formula of cyclohexane is

The chemical formula of cyclohexane is

A) C6H6.
B) C6H8.
C) C6H10.
D) C6H12.


Answer: D) C6H12.

The chemical formula of cyclopropane is

The chemical formula of cyclopropane is

A) C3H3.
B) C3H6.
C) C3H7.
D) C3H8.


Answer: B) C3H6.

All of the following are properties of hydrocarbons EXCEPT

All of the following are properties of hydrocarbons EXCEPT

A) they have a higher density than water.
B) their boiling points increase as the number of carbons increases.
C) they burn readily.
D) they are good solvents for nonpolar substances.


Answer: A) they have a higher density than water.

A molecular formula of an alkane is

A molecular formula of an alkane is

A) C7H16.
B) C6H12.
C) C5H10.
D) C4H8.


Answer: A) C7H16.

Which of the following alkanes will have the lowest boiling point?

Which of the following alkanes will have the lowest boiling point?

A) CH4
B) C6H14
C) C16H34
D) C19H40


Answer: A) CH4

Which of the following alkanes will have the highest boiling point?

Which of the following alkanes will have the highest boiling point?

A) CH4
B) C6H14
C) C16H34
D) C19H40


Answer: D) C19H40

Which of the following is NOT a property of alkanes?

Which of the following is NOT a property of alkanes?

A) Alkanes are not soluble in water.
B) Alkanes have a lower density than water does.
C) Alkanes will undergo addition reactions.
D) Alkanes will burn easily and can be used as fuels.


Answer: C) Alkanes will undergo addition reactions.

Which one of the following statements is NOT true of all alkanes?

Which one of the following statements is NOT true of all alkanes?

A) All alkanes burn to produce carbon dioxide and water.
B) All alkanes consist of carbon and hydrogen.
C) All alkanes exist as two or more isomers.
D) All alkanes fit the general molecular formula CnH2n+2.


Answer: C) All alkanes exist as two or more isomers.

The formula for cyclopropane is

The formula for cyclopropane is

A) C3H8.
B) C7H16.
C) C3H6.
D) C7H12.


Answer: C) C3H6.

The formula for hexene is

The formula for hexene is

A) C6H12.
B) C7H16.
C) C3H8.
D) C6H12.


Answer: C) C3H8.

The formula for butane is

The formula for butane is

A) C4H10.
B) C5H12.
C) C6H14.
D) C4H8.


Answer: A) C4H10.

The compounds CH3CH3 and CH3CH2CH3 are

The compounds CH3CH3 and CH3CH2CH3 are

A) isomers.
B) allotropes.
C) isotopes.
D) homologs.


Answer: D) homologs.

Compounds with the same number and kinds of atoms but with different structures are known as

Compounds with the same number and kinds of atoms but with different structures are known as

A) homologs.
B) isotopes.
C) isomers.
D) allotropes.


Answer: C) isomers.

Alkanes are often called

Alkanes are often called

A) unsaturated hydrocarbons.
B) saturated hydrocarbons.
C) carbohydrates.
D) saturated fats.


Answer: B) saturated hydrocarbons.

Which of the following is NOT a reason for the great variety of organic molecules?

Which of the following is NOT a reason for the great variety of organic molecules?

A) The ability of carbon to form chains
B) Carbon atoms can form more than four bonds.
C) Isomerism
D) Carbon forms bonds with a variety of elements, including H, O, N, Cl and Br.


Answer: B) Carbon atoms can form more than four bonds.

How many different structural isomers are there for a hydrocarbon with the formula C6H14?

How many different structural isomers are there for a hydrocarbon with the formula C6H14?

A) 1
B) 2
C) 3
D) > 4


Answer: D) > 4

How many different structural isomers are there for a hydrocarbon with the formula C5H12?

How many different structural isomers are there for a hydrocarbon with the formula C5H12?

A) 1
B) 2
C) 3
D) 4


Answer: C) 3

How many different structural isomers are there for a hydrocarbon with the formula C4H10 ?

How many different structural isomers are there for a hydrocarbon with the formula C4H10 ?

A) 1
B) 2
C) 3
D) 4

Answer: D

What is the name of the compound that has the formula CH3CH3?

What is the name of the compound that has the formula CH3CH3?

A) methane
B) ethane
C) propane
D) butane


Answer: B) ethane

Which of the following alkanes contains two carbons?

Which of the following alkanes contains two carbons?

A) ethene
B) ethane
C) methane
D) methyne


Answer: B) ethane

A compound containing only carbon and hydrogen and which has only single bonds between atoms is classified as an

A compound containing only carbon and hydrogen and which has only single bonds between atoms is classified as an

A) alkane.
B) alkene.
C) aromatic compound.
D) alkyne.


Answer: A) alkane.

A compound containing only carbon and hydrogen and which has only single bonds between atoms is classified as an

A compound containing only carbon and hydrogen and which has only single bonds between atoms is classified as an

A) alkane.
B) alkene.
C) alkyne.
D) aromatic.


Answer: A) alkane.

What is the name of the compound with a formula CH3CH2CH3?

What is the name of the compound with a formula CH3CH2CH3?

A) methane
B) ethane
C) propane
D) butane


Answer: C) propane

Petroleum jelly is

Petroleum jelly is

A) a mixture of low carbon number hydrocarbons.
B) a mixture of moderate carbon number hydrocarbons.
C) a mixture of higher carbon number hydrocarbons.
D) none of the above


Answer: C) a mixture of higher carbon number hydrocarbons.

The simplest alkane is

The simplest alkane is

A) monane.
B) ethane.
C) methane.
D) propane.


Answer: C) methane.

The unique aspect of a saturated hydrocarbon is that it must contain

The unique aspect of a saturated hydrocarbon is that it must contain

A) only carbon and hydrogen.
B) only single bonds.
C) single and double bonds.
D) single, double and triple bonds.


Answer: B) only single bonds.

Carbon is almost always

Carbon is almost always

A) monovalent.
B) divalent.
C) trivalent.
D) tetravalent.


Answer: D) tetravalent.

The element whose atoms have a unique ability to bond to each other and to other kinds of atoms is ________.

The element whose atoms have a unique ability to bond to each other and to other kinds of atoms is ________.

A) sodium
B) carbon
C) sulfur
D) nitrogen


Answer: B) carbon

An organic compound is best defined as

An organic compound is best defined as

A) a compound containing carbon.
B) a compound of carbon and hydrogen.
C) a compound produced by a living organism.
D) a compound that is NOT produced in a laboratory.


Answer: A) a compound containing carbon.

The most unique property of carbon is its ability to

The most unique property of carbon is its ability to

A) form four bonds.
B) bond to oxygen.
C) bond to nitrogen.
D) bond to carbon.


Answer: D) bond to carbon.

Approximately what percentage of known compounds are classified as organic compounds?

Approximately what percentage of known compounds are classified as organic compounds?

A) ≈ 95%
B) ≈ 70%
C) ≈ 40%
D) ≈ 20%


Answer: A) ≈ 95%

Organic chemistry is most broadly defined as

Organic chemistry is most broadly defined as

A) the chemistry of living systems.
B) the chemistry of substances produced by living systems.
C) the chemistry of the compounds of carbon.
D) the chemistry of the non-metallic compounds.


Answer: C) the chemistry of the compounds of carbon.