Classification of Elements and Periodicity in Properties questions

826 published questions with worked solutions.

• Which of the following pairs show reverse properties on moving along a period from left to right and from top to down in a group?...
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• The order of first ionisation energies of the element Li, Be, B, Na is [Kerala CEE 2005]
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• Be and Al exhibit diagonal relationship. Which of the following statement about them is/are not true? I. Both react with HCl to...
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• The electron affinity values (in kJ mol⁻¹) of three halogens X, Y and Z are respectively -349, -333 and -325. Then X, Y and Z...
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• Which of the following has largest ionic radius?
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• The first ionisation energy of oxygen is less than that of nitrogen. Which of the following is the correct reason for this...
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• The correct decreasing order of first ionisation enthalpies of five elements of the second period is [Kerala CEE 2011]
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• Which element has highest electronegativity?
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• The set representing the correct order of ionic radius is [AIEEE 2009]
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• The pair of elements having approximately equal ionisation potential is
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• One mole of magnesium in the vapour state absorbed 1200 kJmol⁻¹ of energy. If the first and second ionisation energies of Mg are...
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• The electronic configuration of the atom having maximum difference in first and second ionisation energies is [Guj CET 2008]
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• The element having highest electron affinity is [BCECE 2007]
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• Electron affinity is positive, when [BCECE 2006]
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• The correct order of radii is [WB-JEE 2007]
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• The ions O^ 2- , F^-, Na^+, Mg^ 2+ and Al^ 3+ are isoelectronic. Their ionic radii show [Pb. CET 2010]
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given...
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• Which one of the following ions has the highest value of ionic radius?
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• Observe the following statement I. The physical and chemical properties of elements are periodic functions of their electronic...
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• Which one of the following has maximum ionisation potential?
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties

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