Organic chemistry — IGCSE Chemistry (0620) questions by topic

Which row identifies compounds in the same homologous series? chemical properties functional group --- --- --- A different different B different same C similar different D similar…

The molecular formula of compound Z is C4H10. Which row identifies the substance that reacts with Z and describes the type of reaction that occurs? substance type of reaction ---…

Which list shows the fractions obtained from the fractional distillation of petroleum, in order of increasing boiling point? A bitumen → diesel oil → fuel oil → lubricating oil B…

Three statements about cracking of larger alkane molecules are listed. 1 Cracking produces petrol for cars. 2 Cracking only produces short-chain alkenes. 3 Cracking produces…

Some words used to describe organic compounds are listed. 1 hydrocarbon 2 monomer 3 saturated 4 unreactive Which words describe ethene? A 1 and 2 B 1 and 3 C 2 and 4 D 3 and 4

The diagrams show the structures of four molecules. Molecule 1: a four-carbon ring/chain of two CH2-CH2 units fully saturated with hydrogens (C4H8, cyclobutane-style arrangement…

Which equation represents the overall reaction that produces electricity in a hydrogen-oxygen fuel cell? A H2 + O2 - H2O2 B 2H2O - 2H2 + O2 C 2H2 + O2 - 2H2O D 2H2O2 - 2H2O + O2

The formulae for three organic compounds are listed. 1 C2H4 2 C4H8 3 C4H10 Which compounds belong to the same homologous series? A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and…

Which fuel could be gasoline? The answer is selected using a key (decision tree): First question: "Is it obtained from petroleum?" If yes, go to "Is it used as fuel for cars?"…

Three hydrocarbons are separately mixed with aqueous bromine. The three hydrocarbons (shown as displayed formulae) are: methane CH4 (saturated), ethane C2H6 (saturated), and…

Which compound is formed when ethene reacts with steam? A ethane B ethanoic acid C ethanol D poly(ethene)

Which statements about ethanoic acid are correct? 1 Its aqueous solution has a pH value of 10. 2 It reacts with metal carbonates to produce carbon dioxide gas. 3 It reacts with…

Which statement explains why plastic bags made from poly(ethene) accumulate in oceans? A Poly(ethene) is a saturated molecule. B Poly(ethene) is made from hydrocarbon monomers. C…

What is produced in a hydrogen-oxygen fuel cell? A hydrogen and oxygen B hydrogen only C carbon dioxide D water

Which statement about members of a homologous series is correct? A They are elements with the same chemical properties. B They are compounds with the same functional group. C They…

The molecular formulae of four organic compounds, W, X, Y and Z, are shown. W X Y Z --- --- --- --- C3H8O C3H6 C4H8O2 C6H14 Which statement about compounds W, X, Y and Z is…

Fractional distillation is used to separate petroleum into useful fractions. Which statement about the properties of the fractions of petroleum is correct? A The refinery gas…

Which statements about the alkanes are correct? 1 They are generally unreactive except in terms of combustion and substitution by chlorine. 2 They have the general formula…

Which products can be formed by the cracking of one molecule of hexane, C6H14? A C4H10 and C2H4 only B C12H26 and H2 only C C3H7 only D C2H6 and C4H10 only

Which equation represents the overall reaction in a hydrogen–oxygen fuel cell? A. 2H₂ + O₂ → 2H₂O B. 2H₂O → 2H₂ + O₂ C. H₂ + O₂ → H₂O₂ D. H₂O₂ → H₂ + O₂

The equation represents the reaction between ethanoic acid and ethanol. CH₃COOH + CH₃CH₂OH ⇌ CH₃COOCH₂CH₃ + H₂O Which type of reaction does this show? A. addition B.…

Ethanol is warmed with acidified aqueous potassium manganate(VII). Which row describes the type of reaction of the ethanol and the colour change observed in the reaction mixture?…

The structural formula of methyl ethanoate is CH₃COOCH₃. Which compounds are structural isomers of methyl ethanoate? 1. HCOOCH₂CH₃ 2. CH₃CH₂COOH 3. HOCH₂CH₂CH₂OH A. 1, 2 and 3 B.…

What is the total number of covalent bonds in one molecule of propane? A. 8 B. 9 C. 10 D. 11

Industrially, ethanol is produced by fermentation or by the reaction of ethene with steam. Which row is correct? fermentation ethene + steam --- --- --- A uses a temperature of…

Some properties of an organic compound, J, are listed. - It is a liquid at room temperature. - It is soluble in water. - A solution of J reacts with calcium carbonate to form…

The structures of two monomers that are used to make a condensation polymer are shown. One monomer is a dicarboxylic acid (HOOC–COOH, oxalic/ethanedioic acid: a molecule with a…

What is the structural formula of butan-2-ol? A CH3CH2CH2OH B CH3CH(OH)CH3 C CH3CH2CH2CH2OH D CH3CH2CH(OH)CH3

Methanol reacts with ethanoic acid to form an ester. What is the displayed formula for this ester? The four options A-D show displayed formulae of esters. The correct answer (C)…

Petroleum can be separated into useful fractions by fractional distillation. Which row shows a correct use of the named fraction? fraction use --- --- --- A bitumen lubricant B…

Ethane reacts with chlorine in the presence of ultraviolet light. Which products are formed? A ClCH2CH2Cl and H2 B 2CH3Cl and H2 C C2H5Cl and HCl D CH2=CH2 and 2HCl

Ethanol can be made by the fermentation of aqueous glucose and by the catalytic addition of steam to ethene. What are two advantages of making ethanol by the catalytic addition of…

The structure of a polymer repeat unit is shown. The repeat unit contains an amide (N-H and C=O) linkage, indicating a condensation polymer (a polyamide / nylon-type polymer made…

The displayed formula of but-2-ene is shown: a four-carbon chain CH3-CH=CH-CH3 with a carbon-carbon double bond between the second and third carbon atoms. Which displayed formulae…

Which row describes two characteristics of members of the same homologous series? characteristic 1 characteristic 2 --- --- --- A same functional group trend in physical…

Compound W is a hydrocarbon that contains single bonds only. Which homologous series contains W? A alkenes B alkanes C carboxylic acids D alcohols

Methane forms chloromethane in a photochemical reaction using ultraviolet light. Which statement about this reaction is correct? A Methane is mixed with hydrogen chloride gas, and…

Which statement about polymers is correct? A Nylon contains the amide linkage -C(=O)-N(H)- (a carbonyl carbon bonded to a nitrogen carrying a hydrogen). B Nylon is a polyester. C…

This question is about organic chemistry. Name the process that separates petroleum into its useful components.

This question is about organic chemistry. State the meaning of the term hydrocarbon.

This question is about organic chemistry. Petroleum is a mixture of hydrocarbons and is separated by fractional distillation in an industrial process. State which physical…

Ethene, C2H4, is the first member of a family of similar compounds which contains the alkene functional group. State the term for a family of similar compounds which contain the…

Which statements about a hydrogen-oxygen fuel cell are correct? 1 The main form of energy released by the fuel cell is heat. 2 The reaction is a redox reaction. 3 An acidic gas is…

Which formula represents a compound that is a member of the homologous series of alkanes? A C2H4 B C3H6 C C4H8 D C5H12

Which statement about ethane is correct? A It rapidly decolourises aqueous bromine. B It does not burn. C It forms long-chain compounds called polymers. D It only contains single…

Which raw material is used to make ethanol by fermentation? A carbon dioxide B ethene C glucose D natural gas

Which statement about ethanoic acid is correct? A It contains a -COOH group. B It has a pH greater than pH 7. C It reacts with sodium carbonate to form hydrogen gas. D It reacts…

Which statement explains why the disposal of plastic waste leads to environmental problems? A Plastic waste forms toxic gases when it is burned. B Plastic waste contains many…

Hydrogen-oxygen fuel cells can be used to power vehicles. What is produced by the fuel cells? 1 carbon dioxide 2 electricity 3 water A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2…

The structures of four organic compounds are shown. 1 is ethanol (CH3CH2OH). 2 is ethene (CH2=CH2). 3 is methanol (CH3OH). 4 is methane (CH4). Which compounds are members of the…

Which of the statements about propene are correct? 1 Propene contains only single bonds. 2 Propene decolourises aqueous bromine. 3 Propene is obtained by cracking large alkanes. 4…

Petroleum is a mixture. Which method is used to separate petroleum into its components? A chromatography B cracking C filtration D fractional distillation

The equation for a reaction that produces ethanol is shown: ethene + steam → ethanol Which type of reaction does the equation represent? A addition B combustion C fermentation D…

Four statements about ethene or poly(ethene) are listed: 1 Poly(ethene) is produced by an addition reaction. 2 Ethene is a monomer. 3 Poly(ethene) is a monomer. 4 Poly(ethene)…

Which equation represents the overall reaction in a hydrogen-oxygen fuel cell? A 4H + O2 → 2H2O B 2H2 + O2 → 2H2O C H2 + O2 → H2O D 2H + O → H2O

The structures of four organic compounds, W, X, Y and Z, are shown. W is propane (CH3CH2CH3). X is propene (CH3CH=CH2). Y is ethanol (CH3CH2OH). Z is ethane (CH3CH3). Which…

Which molecular formula represents an alkene? A C2H6O B C2H6 C CH4 D C3H6

Which row identifies the petroleum fractions used to reduce the friction between metal parts in engines and as a fuel in cars? (columns: fraction used to reduce friction in…

Four fuels are listed: 1 ethanol 2 coal 3 hydrogen 4 natural gas Which fuels are fossil fuels? A 1, 2 and 3 B 1 and 3 only C 2 and 4 D 4 only

Aqueous bromine is added to two test-tubes. Excess hexene is added to one test-tube. Excess hexane is added to the second test-tube. Which row describes the observation in each…

The structure of a compound, G, is shown (CH3CH2COOH); G is in the same homologous series as ethanoic acid. Which row describes an aqueous solution of G? (columns: produces a gas…

Propanoic acid is a carboxylic acid. It has similar chemical properties to ethanoic acid. Which statements are correct? 1 Aqueous propanoic acid is a weaker acid than dilute…

What is a disadvantage of producing ethanol using the catalytic addition of steam to ethene? A the energy cost is low B the process is continuous C the process uses a…

Which statement about the polymer PET is correct? A It can be broken down into its monomers and re-polymerised. B It is an addition polymer. C It is a polyamide. D It is made from…

The formulae of five compounds are listed: 1 C4H10 2 C2H5OH 3 C4H9OH 4 C4H9COOH 5 C5H11OH Which compounds are in the same homologous series? A 1, 3 and 4 B 2, 3 and 5 C 3 and 4…

Propane reacts with chlorine. Which statements about this reaction are correct? 1 Ultraviolet light is used to provide the activation energy. 2 Propane undergoes an addition…

Which formula represents an alkene? A CH4 B C2H4 C C2H6 D C2H5OH

The structures of two compounds used to make an ester are shown: propanoic acid (CH3CH2COOH) and ethanol (CH3CH2OH). What is the name of the ester? A ethyl propanoate B propyl…

Which statement about a homologous series is correct? A All members have the same general formula. B All members have the same molecular formula. C All members have similar…

Which statements about aqueous ethanoic acid are correct? 1 It contains the functional group -COOH. 2 It reacts with carbonates to produce hydrogen. 3 It turns universal indicator…

Alkenes react with steam in an addition reaction. Some alkenes produce only one alcohol product; some produce two different alcohols which are structural isomers. Which row gives…

What is an advantage of manufacturing ethanol by fermentation rather than by the addition of steam to ethene? A No gases that cause global warming are produced. B The ethanol that…

The diagram shows the structure of a polymer (a poly(alkene) chain with -CH3 and other side groups on alternate carbons). Which structure (A, B, C or D) represents the monomer for…

Hydrogen-oxygen fuel cells and gasoline are each used to power cars. Which statement describes an advantage of using hydrogen-oxygen fuel cells in cars in comparison with gasoline…

Which structures represent a pair of structural isomers? 1 CH3CH2CH2CH2CH2CH3 2 CH3CH2CH2CH2CH(CH3)2 3 CH3CH(CH3)CH2CH2CH3 4 CH3CH(CH3)CH2CH2CH2CH3 A 1 and 2 B 1 and 3 C 2 and 4 D…

Alkanes are a homologous series of hydrocarbons. The table shows the names and boiling points of the first four members (name; boiling point / °C): methane -162; ethane -89;…

Which displayed formula (A, B, C or D) represents the ester formed by the reaction of propan-1-ol with ethanoic acid? The correct ester is propyl ethanoate, CH3COOCH2CH2CH3, shown…

Ethanol can be manufactured by fermentation and by the catalytic addition of steam to ethene. Which statement identifies an advantage of using one of these methods? A Catalytic…

Which statement about carboxylic acids is correct? A They react with alkalis to form a salt and water. B They react with metals to form a salt and water. C They react with metal…

The structure of a polymer is shown (a polyamide, with repeating -N(H)-C(=O)- amide linkages). Which statement about this polymer is correct? A Alkenes are polymerised to make the…

Methane undergoes substitution reactions with chlorine and complete combustion with excess oxygen. Which row about the two reactions is correct? (columns: condition for reaction…

Fig. 4.1 shows the displayed formula of a compound extracted from a plant, containing two carbon-carbon double bonds (C=C) and a hydroxyl/alcohol group. On Fig. 4.1, draw a circle…

Fig. 8.1 shows the displayed formulae of five organic compounds, V, W, X, Y and Z. V is propane (CH3CH2CH3). W is ethanol (CH3CH2OH). X is methanoic acid (HCOOH). Y is ethanoic…

Some plants produce ethene gas. Draw the displayed formula for a molecule of ethene.

This question is about carboxylic acids and alkanes. Table 8.1 shows the names, formulae and boiling points of some carboxylic acids (name; formula; boiling point / °C): methanoic…

Answer the following questions using only the structures in Fig. 1.1 (A = ethene; B = hydrogen chloride HCl; C = methane CH4; D = a giant covalent structure; E = ethane; F =…

This question is about hydrocarbons. Table 8.1 shows the names, formulae and boiling points of methane, ethane, propane and butane (name; formula; boiling point / °C): methane CH4…

A list of gases is shown (ammonia, helium, hydrogen, carbon dioxide, carbon monoxide, chlorine, methane, nitrogen dioxide, propene, sulfur dioxide). Each gas may be used once,…

Petroleum is an important raw material that is separated into useful products. Which terms describe petroleum and the method used to separate it? description separation method ---…

Which statements about homologous series are correct? 1 All carboxylic acids have similar chemical properties. 2 All alcohols have the same molecular mass. 3 Ethane and ethene are…

The formulae of two organic compounds, P and Q, are shown. P: CH3CH2CH2OH Q: CH3CH=CHCH3 Which type of organic compounds are P and Q? P Q --- --- --- A alcohol alkane B alcohol…

Which fuel is manufactured by fermentation? A diesel B ethanol C hydrogen D kerosene

Which statement about the disposal of waste plastics is correct? A They are put in landfill sites, where they quickly decompose. B They are burned to produce non-toxic products. C…

Hydrogen-oxygen fuel cells can be used to power cars. Which processes produce the fuel of a hydrogen-oxygen fuel cell? 1 the cracking of hydrocarbons 2 the electrolysis of dilute…

What are the products formed when glucose is fermented? A ethanol and carbon dioxide B ethanol and oxygen C ethene and carbon dioxide D ethene and oxygen

Which structure represents a molecule of ethanol? (Four displayed structural formulae are shown: A is ethane CH3CH3; B is ethene CH2=CH2; C is ethanol CH3CH2OH; D is a structure…

Which statement describes a homologous series? A a family of elements in the same group of the Periodic Table B a family of elements with similar chemical properties C a family of…

What are the properties of aqueous ethanoic acid? (The table has three columns: decolourises aqueous bromine; reacts with calcium carbonate to make carbon dioxide; turns damp red…

Four different organic compounds are separated by a fractionating column. The table shows the boiling points of the compounds: Q 69 °C, R 196 °C, S 90 °C, T 125 °C. The diagram…

Fractional distillation is used to separate petroleum into its fractions. Which statement about the fractional distillation of petroleum is correct? A The kerosene fraction is…

Which row gives the relative molecular mass, Mr, of the first member of the named homologous series? homologous series Mr --- --- --- A alkanes 12 B alkenes 14 C alcohols 32 D…

A hydrocarbon decolourises bromine water. Which statement about the hydrocarbon is correct? A It is an alkane. B Its molecular formula is C2H6. C It is a saturated hydrocarbon. D…

Which statement describes how ethanol is manufactured from ethene? A Steam is added to ethene using an acid catalyst at 30 °C. B Steam is added to ethene using an acid catalyst at…

Ethanoic acid reacts with aqueous sodium carbonate. Which gas is given off in this reaction? A hydrogen B carbon dioxide C carbon monoxide D oxygen

Which statement describes an advantage of using a hydrogen-oxygen fuel cell in a car compared to a gasoline engine? A The hydrogen is difficult to store. B The hydrogen is highly…

Four statements about members of the same homologous series are listed. 1 They have the same volatility. 2 They have the same molecular formula. 3 They have the same functional…

Ethene reacts with steam to produce ethanol. Which row describes each compound? ethene ethanol --- --- --- A saturated saturated B saturated unsaturated C unsaturated saturated D…

Which process is used to make an alkene from a long-chain alkane? A combustion B condensation C cracking D polymerisation

Which fraction obtained from petroleum has the lowest boiling point? A diesel oil B fuel oil C kerosene D naphtha

Alkanes undergo substitution reactions with chlorine in the presence of ultraviolet light. Which equation shows a reaction of this type? A C3H6 + Cl2 - C3H6Cl2 B C3H8 + Cl2 -…

Information about two reactions of ethene is listed. - Reaction 1 requires a nickel catalyst. - Reaction 2 requires an acid catalyst. Which substance reacts with ethene in each…

Which process converts CH3CH2OH to CH3COOH? A bacterial oxidation B fermentation C catalytic addition of steam D catalytic addition of hydrogen

The structure of an ester is shown: CH3CH2-C(=O)-O-CH2CH3. Which row identifies the name of the ester and the two compounds from which it is made? name compound 1 compound 2 ---…

Which statements about monomers or polymers are correct? 1 Monomers are always joined together by addition reactions. 2 A polymer can be formed from a single type of monomer. 3 A…

The diagram shows the structure of a naturally occurring polymer, Q, with repeating -N-C(=O)- amide linkages. What is Q? A an amino acid B nylon C a protein D PET

Bromine reacts with but-2-ene. What is the displayed formula of the product of this reaction? (Four displayed formulae A-D are shown; the correct one has a Br atom added to each…

Which statement is correct? A Bitumen is used as a fuel for ships. B Coal, natural gas and oxygen are all fuels. C Hydrogen is the main constituent of natural gas. D Petroleum is…

Which statement explains why ethanoic acid is saturated? A The molecule dissociates completely in water. B There is a carbon-oxygen double bond in the molecule. C The…

Which statement about compounds in the same homologous series is correct? A They have the same chemical properties because they have the same number of carbon atoms. B They have…

Which row shows the properties of methane? soluble in water state at room temperature gives a positive test with aqueous bromine --- --- --- --- A no gas no B no gas yes C yes…

The table shows two methods used to make ethanol: fermentation (batch, 35 °C, 1 atm, yeast, sugar cane); adding steam to ethene (continuous, 300 °C, 60 atm, acid catalyst,…

Which equation represents an addition reaction? A CH3CHO + HCN - CH3CH(OH)CN B C6H6 + Br2 - C6H5Br + HBr C NH4Br - NH3 + HBr D C14H30 - C2H4 + C8H18 + C4H8

The structure of part of a polymer is shown, containing an amide (N-C=O) linkage and an ester (C-O-C=O) linkage. How many amide and ester linkages are included in the structure…

Which structure represents part of a protein? (Four structures A-D are shown; the correct one shows repeating amino-acid units joined by amide/peptide -N-C(=O)- linkages.) A B C D

Which statement about a hydrogen-oxygen fuel cell is not correct? A Chemical energy is converted into electrical energy. B Hydrogen is oxidised. C The reaction that takes place is…

Which compounds have similar chemical properties? A butanol and butanoic acid B ethane and ethene C methane and butane D propene and propanol

Four statements about organic compounds P, Q, R and S are listed. P is a saturated hydrocarbon. The formula of Q is CH3CH3. A molecule of R contains only one oxygen atom. Compound…

The structure of an organic compound is shown: CH3CH2Cl (a two-carbon chain with one chlorine atom). What is the name of the compound? A chloroethane B chloroethene C…

Which statement about the manufacture of ethene from larger alkane molecules is correct? A A low temperature is required. B The process is called cracking. C The process requires…

Which processes are used to make ethanoic acid? 1 heating ethanol with acidified aqueous potassium manganate(VII) 2 bacterial oxidation of ethanol 3 distilling ethanol using a…

Which statement about propene, C3H6, is correct? A Propene reacts with bromine in the dark in a substitution reaction. B Propene reacts with steam in the presence of an alkaline…

How many of each type of bond are present in ethanoic acid, CH3COOH? C-H C-C C=O --- --- --- --- A 3 1 1 B 3 0 2 C 4 0 2 D 4 1 2

Which diagram represents the structure of a protein? (Four structures A-D are shown; the correct one shows amino-acid units joined by amide/peptide -N-C(=O)- linkages.) A B C D

Fig. 4.1 shows the displayed formula of compound A: a five-carbon chain H–C(H2)–C(H2)–C(H)=C(H)–C(H2)–H, i.e. CH3CH2CH=CHCH3 (pent-2-ene), containing one carbon–carbon double…

Fig. 4.1 shows the displayed formula of compound A (malic acid): HO–C(=O)–CH(–O–H)–CH2–C(=O)–O–H, a molecule containing a hydroxyl (O–H) group and two carboxylic acid groups. On…

Fig. 4.1 shows the displayed formula of compound A (serine), a molecule containing a hydroxyl (O–H) group, an amine (N–H) group and a carboxylic acid (–COOH) group. On Fig. 4.1…

Hydrogen is the first element of the Periodic Table. Hydrogen is used in fuel cells to produce electricity in vehicles. Name the substance which combines with hydrogen in a fuel…

Natural polyamides are polymers made from amino acid monomers. State the type of polymerisation reaction that occurs when natural polyamides form.

Alkenes are manufactured by cracking larger alkane molecules. State the source of the large alkane molecules used in cracking.

Polyamides and polyesters are polymers. Polyamides can occur naturally or can be manufactured. Part of the structure of a polyamide is shown in Fig. 6.1 (a chain showing repeating…

A list of substances is shown: bauxite; carbon dioxide; cryolite; ethane; ethanol; ethene; graphite; helium; hematite; hydrogen; silicon(IV) oxide; sodium chloride. Answer the…

This question is about hydrocarbons. State the meaning of the term hydrocarbon.

Fig. 7.1 shows the displayed formula of mesaconic acid (a molecule containing two carboxylic acid –COOH groups, a C=C double bond and a –CH₃ branch). On Fig. 7.1 draw a circle…

Fig. 7.1 shows the displayed formula of compound D (a molecule containing a -OH alcohol group, a C=C double bond and two -COOH carboxylic acid groups). On Fig. 7.1 draw a circle…

This question is about organic compounds. Butane reacts with chlorine in a photochemical reaction. C₄H₁₀ + Cl₂ → C₄H₉Cl + HCl State the meaning of the term photochemical.

Propane and propene both react with chlorine. When a molecule of propane, C₃H₈, reacts with chlorine in the presence of ultraviolet light, one atom of hydrogen is replaced by one…

Carboxylic acids can be converted to esters. Name the ester formed when butanoic acid, CH₃CH₂CH₂COOH, reacts with ethanol, CH₃CH₂OH.

This question is about organic compounds. Propane and chlorine react at room temperature. An equation for the reaction is shown. C₃H₈ + Cl₂ → C₃H₇Cl + HCl State the condition…

Fig. 7.1 shows the displayed formula of compound S. The structure has a central carbon bonded to: H, an -O-H (hydroxyl) group, another carbon bearing two H atoms, and a carboxylic…

Answer the following questions using only the compounds from the list (ammonia, carbon dioxide, carbon monoxide, cobalt(II) chloride, ethane, ethene, glucose, methane, potassium…

Fig. 7.1 shows the displayed formula of fumaric acid (a molecule with two carboxylic acid -COOH groups and a C=C double bond between two CH carbons). On Fig. 7.1, draw a circle…

Ethanoic acid and methacrylic acid are both carboxylic acids. Complete the word equation for the reaction of ethanoic acid with calcium: ethanoic acid + calcium → +

Ethanol is manufactured by two methods: method 1 — fermentation of aqueous glucose; method 2 — catalytic addition of steam to an alkene. Method 1 takes place at room temperature…

A homologous series is a family of organic compounds whose members have similar chemical properties. Give two characteristics that are the same for all members of a homologous…

Esters are members of a homologous series of organic compounds. Give two characteristics that are the same for all members of a homologous series.