17 JEE Main 2020 Classification of Elements and Periodicity in Properties previous-year questions with verified answers and step-by-step solutions.
These are the JEE Main 2020 previous-year questions from the Classification of Elements and Periodicity in Properties chapter of Chemistry. Each links to a full solution with a verified answer key. To see the whole chapter across all years, visit the Classification of Elements and Periodicity in Properties chapter hub.
The electron gain enthalpy (in kJ m o l ) of fluorine, chlorine, bromine and iodine, respectively, are
The first and second ionisation enthalpies of a metal are 496 and 4560   k J   m o l - 1 , respectively. How…
The increasing order of the atomic radii of the following elements is: a C b O c F d C l e B r
The third ionization enthalpy is minimum for:
The acidic, basic and amphoteric oxides, respectively, are
The five successive ionization enthalpies of an element are 800 ,   2427 ,   3658 ,   35024    …
The atomic number of Unnilumium is ______.
The process that is NOT endothermic in nature is :
The elements with atomic numbers 101 and 104 belong to, respectively:
The atomic number of the element unnilennium is :
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