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Indian Navy SSR (Sailor) Chemical Kinetics — practice questions

Explore 26 free Chemical Kinetics questions in Indian Navy SSR (Sailor) 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 1–26 of 26.

For radioactive decay (1st order), if 1/8 of initial nuclei remain, how many half-lives elapsed?Read the answer and worked solution →Order or molecularity?Read the answer and worked solution →True or false: order and molecularityRead the answer and worked solution →Read the order off the rate lawRead the answer and worked solution →Complete the definition of orderRead the answer and worked solution →True or false: where a rate law comes fromRead the answer and worked solution →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

For radioactive decay (1st order), if 1/8 of initial nuclei remain, how many half-lives elapsed?

  1. 2
  2. 3 (since (1/2)³ = 1/8)
  3. 4
  4. 8
Show answer and solution

Correct answer: B. 3 (since (1/2)³ = 1/8)

N/N₀ = (1/2)^n where n is the number of half-lives. (1/2)^n = 1/8 → n = 3.

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Order or molecularity?

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Items
  1. Item
    Found experimentally
    Category
    Order
  2. Item
    Can be zero or a fraction
    Category
    Order
  3. Item
    Read off the rate law
    Category
    Order
  4. Item
    Defined only for elementary reactions
    Category
    Molecularity
  5. Item
    Limited to values 1, 2 or 3
    Category
    Molecularity
  6. Item
    Counts the species in one step
    Category
    Molecularity
Categories
  1. Item
    Order
  2. Item
    Molecularity
Order is measured; molecularity is counted from a proposed mechanism. Order can be zero or fractional, molecularity cannot. Source: syllabus Chemistry Part I, Ch 3 Chemical Kinetics.

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True or false: order and molecularity

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Questions
  1. Statement is true
    Yes
    Statement
    Order can be zero, a whole number, or a fraction.
  2. Statement is true
    No
    Statement
    Molecularity can be zero.
  3. Statement is true
    Yes
    Statement
    Molecularity is defined only for an elementary reaction.
  4. Statement is true
    Yes
    Statement
    For an elementary reaction, order and molecularity are the same.
  5. Statement is true
    No
    Statement
    Molecularity may take any value above 3.
They agree only for an elementary reaction, which is the whole point of keeping them apart. Source: syllabus Chemistry Part I, Ch 3 Chemical Kinetics.

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