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ICSE Class 10 Organic Chemistry — practice questions — page 2

Explore 138 free Organic Chemistry questions in ICSE Class 10 Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Organic Chemistry questions and exercises with answers

Showing questions 31–60 of 138.

Which suffix pair names single- then double-bond hydrocarbons?Read the answer and worked solution →What is the IUPAC name for CH₄?Read the answer and worked solution →How is the two-carbon saturated hydrocarbon named?Read the answer and worked solution →How many structural isomers does butane, C₄H₁₀, have?Read the answer and worked solution →What distinguishes members of a homologous series?Read the answer and worked solution →By what unit do successive straight-chain alkanes differ?Read the answer and worked solution →What is the mass difference between adjacent alkane homologues?Read the answer and worked solution →Which properties are generally similar within a homologous series?Read the answer and worked solution →What is true of molecules that are isomers?Read the answer and worked solution →How do structural isomers differ?Read the answer and worked solution →What do cis and trans describe around an alkene double bond?Read the answer and worked solution →Why do cis and trans alkene forms interconvert slowly?Read the answer and worked solution →How is the main chain chosen when naming an alkane?Read the answer and worked solution →How are branched alkane substituents located in the name?Read the answer and worked solution →What determines the number used for a substituent position?Read the answer and worked solution →What prefix names a cyclic alkane?Read the answer and worked solution →What is acetylene called in IUPAC nomenclature?Read the answer and worked solution →Which substances are the two main commercial sources of alkanes?Read the answer and worked solution →What is an alkyl group?Read the answer and worked solution →Which feature is used to distinguish position isomers?Read the answer and worked solution →Which bond types occur in a carbon-carbon double bond?Read the answer and worked solution →In the name ethanol, what does the suffix -ol identify?Read the answer and worked solution →How many carbon atoms are in one ethanol molecule?Read the answer and worked solution →Which molecular formula represents ethanol?Read the answer and worked solution →Which group is present in ethanol?Read the answer and worked solution →Ethanol belongs to which class of alcohols?Read the answer and worked solution →What type of liquid is ethanol at room temperature?Read the answer and worked solution →What flame is described for burning ethanol?Read the answer and worked solution →What happens when ethanol and water are mixed?Read the answer and worked solution →Which kind of catalyst helps ethanol react with a carboxylic acid?Read the answer and worked solution →

Worked practice questions

Which suffix pair names single- then double-bond hydrocarbons?

  1. -ane; -ene
  2. -ene; -ane
  3. -yne; -ene
  4. -ane; -yne
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Correct answer: A. -ane; -ene

1. The question asks for the suffixes used for two simple hydrocarbon families, in the stated order: single bonds first, then a double bond. 2. The suffix -ane identifies an alkane, whose carbon-carbon bonds are all single. The suffix -ene identifies an alkene with a carbon-carbon double bond. 3. Therefore the required pair is -ane; -ene, which is option A. The suffix -yne would identify a carbon-carbon triple bond.

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What is the IUPAC name for CH₄?

  1. Methane
  2. Butane
  3. Propane
  4. Ethane
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Correct answer: A. Methane

1. The molecular formula CH₄ contains one carbon atom bonded to four hydrogen atoms. 2. A one-carbon parent uses the root meth-. This saturated molecule has only single bonds, so the alkane suffix is -ane. 3. Combining the root and suffix gives methane, option A. Ethane, propane and butane contain two, three and four carbon atoms respectively.

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How is the two-carbon saturated hydrocarbon named?

  1. Methane
  2. Propane
  3. Ethane
  4. Butane
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Correct answer: C. Ethane

The two-carbon saturated hydrocarbon is ethane.

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