Classification of Elements and Periodicity in Properties questions

826 published questions with worked solutions.

• Which among the following elements has the lowest value of ionisation energy?
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• Which of the following is the largest ion?
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• The decreasing values of bond angles from NH_3 (106^ ) to SbH_3 (101^ ) down group-15 of the periodic table is due to:
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• Alkali metals in each period have:
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• Which represents a collection of isoelectronic species?
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• The correct order of the second ionization potential of carbon, nitrogen, oxygen and fluorine is:
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• Which of the ions has the largest ionic radius?
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• The IP_1, IP_2, IP_3, IP_4 and IP_5 of an element are 7.1, 14.3, 34.5, 46.8, 162.2 eV respectively. The element is likely to be:
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• An element X has 3 electrons in p-orbitals and also belongs to period III. Its molecular formula should be:
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• The ionization potential order for which set is correct?
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• The radii of F, F^-, O and O^ 2- are in the order:
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• Among the following elements, which has the lowest value of ionisation energy?
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• If the ionic radii of K^+ and F^- are taken to be about 1.34 Å each, then the expected values of the atomic radii of K and F...
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• Which set has the strongest tendency to form anions?
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• The correct order of increasing electropositive character among Cu, Fe and Mg is:
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• The ionisation energy will be maximum for the process:
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• Ionization potential (IP) is influenced by:
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• The decreasing order of the second ionization energy of K, Ca and Ba is:
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• The covalent radius of Li is 123 pm. The crystal (metallic) radius of Li will be:
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• Among O, C, F, Cl, Br, the correct order of increasing atomic radii is:
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties

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