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CG PET Chemical Bonding and Molecular Structure — practice questions — page 4

Explore 96 free Chemical Bonding and Molecular Structure questions in CG PET Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Chemical Bonding and Molecular Structure questions and exercises with answers

Showing questions 91–96 of 96.

Which parameter answers this?Read the answer and worked solution →True or false: resonanceRead the answer and worked solution →Order the steps: draw a Lewis structureRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Assertion and reason: structureRead the answer and worked solution →Flip and pair: parameter with what it measuresRead the answer and worked solution →

Worked practice questions

Which parameter answers this?

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Items
  1. Item
    How far apart are the atoms?
    Category
    Bond length
  2. Item
    Measured in picometres
    Category
    Bond length
  3. Item
    How much energy to break it?
    Category
    Bond enthalpy
  4. Item
    Measured in kilojoules per mole
    Category
    Bond enthalpy
  5. Item
    Single, double or triple?
    Category
    Bond order
  6. Item
    Counts the shared pairs
    Category
    Bond order
Categories
  1. Item
    Bond length
  2. Item
    Bond enthalpy
  3. Item
    Bond order
Matching the question to the measurement. Source: syllabus Chemistry, Ch 4 Chemical Bonding and Molecular Structure.

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True or false: resonance

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Questions
  1. Statement is true
    Yes
    Statement
    Resonance structures share the same skeletal arrangement.
  2. Statement is true
    Yes
    Statement
    The molecule is described by all of them taken together.
  3. Statement is true
    No
    Statement
    The molecule flips between the structures in turn.
  4. Statement is true
    Yes
    Statement
    The contributing forms are called canonical forms.
  5. Statement is true
    Yes
    Statement
    Resonance is needed when one Lewis structure is not enough.
Resonance is a limitation of the notation, not a physical flicker. Source: syllabus Chemistry, Ch 4 Chemical Bonding and Molecular Structure.

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Order the steps: draw a Lewis structure

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Steps
  1. Count the valence electrons of every atom
  2. Arrange the atoms in their skeletal structure
  3. Place one shared pair between each bonded pair of atoms
  4. Distribute the remaining electrons as lone pairs
  5. Add multiple bonds if any atom still lacks a noble gas configuration
Count first, then place, then check. Source: syllabus Chemistry, Ch 4 Chemical Bonding and Molecular Structure.

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