Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEETChemistryClassification of Elements and Periodicity in Properties

What did Johann Dobereiner note about the physical and chemical properties of several groups of three elements?

Options

  1. AThey had no similarity
  2. BThey were unrelated
  3. CThey formed Triads
  4. DThey were all identical

Correct answer

C. They formed Triads

Step-by-step solution

Johann Dobereiner noted a similarity among the physical and chemical properties of several groups of three elements, which he referred to as Triads.

Practice Classification of Elements and Periodicity in Properties on Quantrex Academy →

More from Classification of Elements and Periodicity in Properties

Match the following List I List II A. Technetium I. Non-metal B. Fluorine II. Transition metal C. Tellurium III. Lanthanoid D. Dysprosium IV. Metalloid 2026Which of the following properties increases from fluorine to iodine in group? 2026Identify the metalloid element from the following. 2026Which among the following elements does NOT exhibit -2 oxidation state? 2026Which has the maximum electropositive character? 2026The hydride with lowest acid strength among the following is 2026Among the following options, the correct trend in the electron gain enthalpy is 2026Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R . Assertion A : The first ionization enthalpy of O is lower than that of N and 2026 Full Classification of Elements and Periodicity in Properties list All NEET PYQs