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NEET UG Classification of Elements — practice questions

Explore 108 free Classification of Elements questions in NEET UG Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Classification of Elements questions and exercises with answers

Showing questions 1–30 of 108.

Removing an electron from a neutral atom produces a:Read the answer and worked solution →Adding an electron to a neutral atom produces an:Read the answer and worked solution →Ionic radii are estimated by measuring distances in:Read the answer and worked solution →Ionic radii generally follow the same trend as the:Read the answer and worked solution →A cation is smaller than its parent atom because it has fewer:Read the answer and worked solution →An anion is larger than its parent atom because of increased:Read the answer and worked solution →Species with the same number of electrons are called:Read the answer and worked solution →Among isoelectronic species, a larger nuclear charge gives a radius:Read the answer and worked solution →First ionisation enthalpy generally increases across a:Read the answer and worked solution →First ionisation enthalpy generally decreases down a:Read the answer and worked solution →The first ionisation enthalpy of boron against beryllium is:Read the answer and worked solution →Within the same principal level, the more tightly held electron is the:Read the answer and worked solution →The first ionisation enthalpy of oxygen against nitrogen is:Read the answer and worked solution →In a nitrogen atom the three 2p electrons occupy orbitals that are:Read the answer and worked solution →The pull of an atom on shared electrons in a bond is called:Read the answer and worked solution →Electronegativity, unlike ionisation enthalpy, is:Read the answer and worked solution →The electronegativity of an element is described as:Read the answer and worked solution →Electronegativity helps in predicting the nature of the:Read the answer and worked solution →Atomic size generally decreases as one moves across a:Read the answer and worked solution →Atomic radius increases regularly as one descends a:Read the answer and worked solution →Which ion is smaller than its parent atom?Read the answer and worked solution →Isoelectronic species differ from one another in their:Read the answer and worked solution →True or false on periodic trendsRead the answer and worked solution →Quick picks on periodic trendsRead the answer and worked solution →Match each term to its meaningRead the answer and worked solution →Bigger or smallerRead the answer and worked solution →Measurable or notRead the answer and worked solution →Compare isoelectronic radiiRead the answer and worked solution →Fill the gaps on periodic trendsRead the answer and worked solution →Spot the one that does not fitRead the answer and worked solution →

Worked practice questions

Removing an electron from a neutral atom produces a:

  1. Cation
  2. Anion
  3. Neutron
  4. Photon
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Correct answer: A. Cation

1. The atom loses a unit of negative charge. 2. It is left with a net positive charge. 3. That ion is called a cation. _Source: syllabus Chemistry Part I, Chapter 3, Classification of Elements and Periodicity in Properties._

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Adding an electron to a neutral atom produces an:

  1. Isobar
  2. Anion
  3. Cation
  4. Isotope
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Correct answer: B. Anion

1. The atom gains a unit of negative charge. 2. It is left with a net negative charge. 3. That ion is called an anion. _Source: syllabus Chemistry Part I, Chapter 3, Classification of Elements and Periodicity in Properties._

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Ionic radii are estimated by measuring distances in:

  1. Ionic crystals
  2. Metal vapours
  3. Noble gases
  4. Organic liquids
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Correct answer: A. Ionic crystals

1. An ion cannot be measured in isolation. 2. It is measured where cations and anions sit together. 3. That is in ionic crystals. _Source: syllabus Chemistry Part I, Chapter 3, Classification of Elements and Periodicity in Properties._

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