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Which one of the following

Question:

Which one of the following statements for D.I. Mendeleeff, is incorrect?

  1. He authored the textbook - Principles of Chemistry.v

  2. At the time, he proposed Periodic Table of elements structure of atom was known.

  3. Element with atomic number 101 is named after him.

  4. He invented accurate barometer.

Correct Option: , 2

Solution:

At the time, he proposed the periodic table but structure of atom was unknown.

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