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GUJCET Chemical Kinetics — practice questions — page 3

Explore 80 free Chemical Kinetics questions in GUJCET Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Chemical Kinetics questions and exercises with answers

Showing questions 61–80 of 80.

Instantaneous rate or average rate?Read the answer and worked solution →Match each symbol in the Arrhenius equation to its meaningRead the answer and worked solution →Complete the definition of activation energyRead the answer and worked solution →Tap everything that raises the rate of a reactionRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →The Arrhenius equationRead the answer and worked solution →Order the steps: find the order of a reactionRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →True or false: what kinetics studiesRead the answer and worked solution →Flip and pair: term with meaningRead the answer and worked solution →Tap every factor the chapter says affects the rateRead the answer and worked solution →Complete the collision theory modificationRead the answer and worked solution →Which quantity is being described?Read the answer and worked solution →Assertion and reason: rates and constantsRead the answer and worked solution →Reading the definitions backRead the answer and worked solution →Order the energy story of a reactionRead the answer and worked solution →True or false: the Arrhenius pictureRead the answer and worked solution →Spot the odd one outRead the answer and worked solution →

Worked practice questions

Instantaneous rate or average rate?

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Items
  1. Item
    Measured at a particular instant
    Category
    Instantaneous rate
  2. Item
    The slope at a single point
    Category
    Instantaneous rate
  3. Item
    Taken over a large interval of time
    Category
    Average rate
  4. Item
    A change spread across a period
    Category
    Average rate
Categories
  1. Item
    Instantaneous rate
  2. Item
    Average rate
One is a snapshot, the other is a span. Source: syllabus Chemistry Part I, Ch 3 Chemical Kinetics.

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Match each symbol in the Arrhenius equation to its meaning

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Matching pairs
  1. Left
    k
    Right
    the rate constant
  2. Left
    Ea
    Right
    the activation energy
  3. Left
    A
    Right
    the pre-exponential factor, or collision frequency
  4. Left
    T
    Right
    the absolute temperature
  5. Left
    P
    Right
    the steric factor, for orientation of collisions
k = Ae^(−Ea/RT), and every letter earns its place. Source: syllabus Chemistry Part I, Ch 3 Chemical Kinetics.

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Complete the definition of activation energy

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Missing parts
  1. Answer
    activated complex
    Choices
    1. activated complex
    2. products
    3. solvent
  2. Answer
    reactant
    Choices
    1. reactant
    2. product
    3. catalyst
  3. Answer
    alternate path
    Choices
    1. alternate path
    2. extra collision
    3. higher temperature
Complete the statement
The activation energy is the energy difference between the {0} and the {1} molecules. A catalyst lowers it by providing an {2}.
Activation energy is a difference, not an absolute. Source: syllabus Chemistry Part I, Ch 3 Chemical Kinetics.

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