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Indian Navy Pilot Periodic Classification of Elements — practice questions

Explore 26 free Periodic Classification of Elements questions in Indian Navy Pilot Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Periodic Classification of Elements questions and exercises with answers

Showing questions 1–26 of 26.

Which trend is followed by ionisation energy across a period?Read the answer and worked solution →Three elements B, Si and Ge areRead the answer and worked solution →Match each scientist to their contributionRead the answer and worked solution →Ionic or covalent?Read the answer and worked solution →Complete the driver of bond formationRead the answer and worked solution →Single, double and triple bondsRead the answer and worked solution →True or false: Lewis structuresRead the answer and worked solution →Complete the definition of resonanceRead the answer and worked solution →Tap every bond parameter the chapter namesRead the answer and worked solution →True or false: ionic solidsRead the answer and worked solution →Assertion and reasonRead 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 →Bonded pair or lone pair?Read the answer and worked solution →Flip and pair: term with meaningRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Order the reasoning: why resonance is neededRead the answer and worked solution →Reading the definitions backRead the answer and worked solution →True or false: what bond parameters affectRead the answer and worked solution →Bond parameters in useRead the answer and worked solution →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 trend is followed by ionisation energy across a period?

  1. Continuously increases
  2. Generally increases with some dips
  3. Continuously decreases
  4. Has no clear pattern in the standard view
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Correct answer: B. Generally increases with some dips

1. Ionisation energy rises with nuclear charge across a period. 2. There are exceptions where the configuration is especially stable. 3. Group 13 dips below Group 2; Group 16 dips below Group 15. 4. So the trend is rising overall with small dips at known positions. 5. Hence the general statement 'increases with some dips' is correct. _Source: syllabus Science Ch 5 'Periodic Classification of Elements'_

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Three elements B, Si and Ge are

  1. metals
  2. non-metals
  3. metal, non-metal and metalloid respectively
  4. metalloids
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Correct answer: D. metalloids

This Periodic Classification of Elements item tests a core Chemistry concept. Correct answer: metalloids. _Source: syllabus Exemplar Science Class 10_

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Match each scientist to their contribution

Read exercise and reference answers
Matching pairs
  1. Left
    Kossel
    Right
    electrostatic attraction between ions, giving electrovalency
  2. Left
    Lewis
    Right
    covalent bonding by sharing electron pairs
  3. Left
    Lewis dot symbols
    Right
    show the valence electrons of an atom
  4. Left
    Lewis dot structures
    Right
    show the bonding in a molecule
The chapter opens with these two accounts of bonding. Source: syllabus Chemistry, Ch 4 Chemical Bonding and Molecular Structure.

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