Worksheet: Esters

In this worksheet, we will practice writing and interpreting the names and formulas of esters and describing their uses and properties.

Q1:

Which elements compose the central linkage in an ester molecule?

  • ACarbon only
  • BOxygen and hydrogen
  • CCarbon and hydrogen
  • DCarbon, oxygen, and hydrogen
  • ECarbon and oxygen

Q2:

Ethyl methanoate is formed from the reaction between which two compounds?

  • AMethanol and propanoic acid
  • BMethanol and ethanoic acid
  • CMethanol and methanoic acid
  • DEthanol and ethanoic acid
  • EEthanol and methanoic acid

Q3:

What is the name of the chemical formed from the reaction between methanoic acid and ethanol?

  • AEthyl propanoate
  • BMethyl methanoate
  • CMethyl ethanoate
  • DEthyl ethanoate
  • EEthyl methanoate

Q4:

Complete: Ethyl methanoate and methyl ethanoate are similar as they both have the same .

  • Achemical formula
  • Bdisplayed formula
  • Cskeletal formula
  • Dstructural formula
  • Emolecular formula

Q5:

What is the main product of the reaction when methanoic acid is reacted with ethanol?

  • AKetone
  • BAlcohol
  • CCarboxylic acid
  • DAldehyde
  • EEster

Q6:

Complete the word equation. Carboxylicacidalcohol++

  • Apolyester, hydrogen
  • Bpolyester, water
  • Cester, hydrogen
  • Dester, water
  • Eester, hydrochloric acid

Q7:

Complete: When ethanol reacts with ethanoic acid, two compounds are produced. One is ethyl ethanoate and the other is .

  • Acarbon monoxide
  • Bcarbon dioxide
  • Cwater
  • Dhydrogen
  • Eacid

Q8:

Which of the following substances is used as a catalyst in esterification reactions?

  • APalladium
  • BIron
  • CAlkali
  • DWater
  • EAcid

Q9:

Which of the following is not a property that makes ethyl methanoate suitable for use in the manufacture of some perfumes?

  • AVolatility
  • BLow boiling point
  • CSweet, pleasant smell
  • DNontoxicity
  • EFlammability

Q10:

What is the type of reaction used to break down methyl pentanoate into methanol and pentanoic acid?

  • AReduction
  • BHydrolysis
  • CNeutralization
  • DDecomposition
  • EEsterification

Q11:

Which two chemicals would be used to make ethyl methanoate?

  • A(4) and (1)
  • B(5) and (1)
  • C(6) and (1)
  • D(4) and (3)
  • E(5) and (2)

Q12:

Which two chemicals would be used to make ethyl ethanoate?

  • A(5) and (2)
  • B(3) and (5)
  • C(3) and (4)
  • D(1) and (6)
  • E(5) and (1)

Q13:

Which two chemicals would be used to make methyl ethanoate?

  • A(5) and (1)
  • B(4) and (2)
  • C(5) and (2)
  • D(4) and (3)
  • E(4) and (1)

Q14:

Which two chemicals would be used to make ethyl propanoate?

  • A(5) and (3)
  • B(6) and (3)
  • C(4) and (3)
  • D(4) and (2)
  • E(6) and (2)

Q15:

Which two chemicals could be used to make methyl propanoate?

  • A6 and 1
  • B4 and 3
  • C4 and 2
  • D5 and 2
  • E6 and 2

Q16:

What is the characteristic smell of esters?

  • ASour-milk odor
  • BAlcoholic odor
  • CFish odor
  • DFruity odor
  • EVinegar odor

Q17:

Order the numbers of the following esters according to their water solubility, starting with the one with the highest solubility.

  1. Ethyl propanoate
  2. Ethyl ethanoate
  3. Ethyl butanoate
  4. Ethyl methanoate
  • A3, 1, 4, 2
  • B3, 1, 2, 4
  • C4, 2, 1, 3
  • D4,1, 2, 3
  • E4, 2, 3, 1

Q18:

Which of the following is true about esters?

  • AThey are insoluble in a nonpolar solvent.
  • BThey are less volatile than carboxylic acids of similar molecular weight.
  • CThey are not flammable.
  • DThey are less volatile than alcohols of similar molecular weight.
  • EThey are more volatile than carboxylic acids of similar molecular weight.

Q19:

What are the products following the hydrolysis of methyl ethanoate?

  • AEthanol and methanoic acid
  • BEthanoic acid and water
  • CMethanol and ethanoic acid
  • DMethanol and water
  • EMethanol, ethanoic acid, and water

Q20:

Which of the following properties does not apply to methyl ethanoate?

  • AAromatic smell
  • BSlightly soluble in water
  • CVolatile
  • DLow melting point
  • EHigh boiling point

Q21:

In which of the following applications are esters not used?

  • AFlavoring agents
  • BFats industry
  • CPolymer industry
  • DFragrance industry
  • EPaper industry

Q22:

Which condensed formula might an ester have?

  • ACHCOCH33
  • BCHCOH3
  • CCHONa3
  • DCHOCH33
  • EHCOCH23

Q23:

Which of the following esters has the molecular formula CHO5102?

  • APropyl propanoate
  • BMethyl propanoate
  • CEthyl propanoate
  • DEthyl ethanoate
  • EPropyl methanoate

Q24:

What is the name of ester produced via the reaction between ethanoic acid and methanol?

  • AEthyl propanoate
  • BEthyl methanoate
  • CMethyl propanoate
  • DPropyl ethanoate
  • EMethyl ethanoate

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