Chemistry: Alkanes and Hydrocarbons Quiz
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Questions and Answers

Which type of hydrocarbon is classified as being saturated?

  • Alkynes
  • Alkenes
  • Alkanes (correct)
  • Aromatics

An alkane is a hydrocarbon that forms only ___ covalent bonds.

single

Which compound below is an alkane?

  • CH3CH2CH2CH2CH3 (correct)
  • C4H10 (correct)
  • CH3CH2CH3 (correct)
  • C7H16 (correct)

What is true about the boiling points of alkanes?

<p>They increase with larger molecules. (A), They increase for cycloalkanes. (B), They decrease for branched alkanes. (C), They are the lowest of the organic compounds. (D)</p> Signup and view all the answers

Two compounds are considered isomers if they have:

<p>the same molecular formula and a different structure.</p> Signup and view all the answers

Name the compound CH3-CH2-CH2-CH=CH3.

<p>butene</p> Signup and view all the answers

How many carbons are in 2,3-dimethylpentane?

<p>7</p> Signup and view all the answers

Name CH3-CH2-CH2-O-CH2-CH3.

<p>butyl ethyl ether</p> Signup and view all the answers

Propanal is classified as:

<p>an aldehyde</p> Signup and view all the answers

Amines are:

<p>Based on NH3 with hydrogen groups being replaced by alkyl groups. (A), Organic compounds containing nitrogen. (B), Named according to their hydrocarbon groups attached to nitrogen. (C), Known for their awful odors. (D)</p> Signup and view all the answers

Give an example of a polymer.

<p>plexiglass</p> Signup and view all the answers

Study Notes

Alkanes

  • Saturated hydrocarbons, specifically alkanes, consist of carbon atoms connected exclusively by single covalent bonds.
  • Examples of alkanes include the molecular structures CH3CH2CH3, C4H10, C7H16, and CH3CH2CH2CH2CH3.

Boiling Points of Alkanes

  • Boiling points of alkanes represent the lowest boiling points among organic compounds.
  • Boiling points increase with larger alkane molecules due to enhanced dispersion forces.
  • Branched alkanes exhibit lower boiling points compared to their straight-chain counterparts.
  • Cycloalkanes generally have higher boiling points than their linear alkane equivalents.

Isomers

  • Isomers have the same molecular formula but differ in their structural arrangement.

Compound Naming

  • The compound CH3-CH2-CH2-CH=CH3 is known as butene.
  • CH3-CH2-CH2-O-CH2-CH3 is identified as butyl ethyl ether.

Other Organic Compounds

  • Propanal, a type of aldehyde, contains a carbonyl group at the end of its carbon chain.
  • Amines are organic compounds that incorporate nitrogen and are characterized by unpleasant odors. Their naming convention is based on hydrocarbon groups attached to nitrogen, derived from ammonia (NH3) where hydrogen atoms are replaced by alkyl groups.

Polymers

  • Plexiglass serves as an example of a polymer, showcasing properties of larger molecular structures formed through polymerization.

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Description

Test your knowledge about alkanes, a crucial class of hydrocarbons. This quiz covers their definitions, properties, and examples. Perfect for chemistry students looking to solidify their understanding of organic compounds.

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