Classification of Elements and Periodicity in Properties from NCERT Class 11 Chemistry explains how the modern periodic table is organised and how properties change across periods and down groups. It covers atomic and ionic radii, ionisation enthalpy, electron gain enthalpy, electronegativity and valency, trends that are tested directly in NEET and used throughout inorganic chemistry. These free MCQ practice tests focus on applying the trends and their exceptions. Each test is timed, scored instantly and followed by a complete answer review, with new question sets published regularly.