Which one of the following statements for D.I. Mendeleeff, is incorrect?
- (A)At the time, he proposed periodic table of elements structure of atom was known.✓ Correct
- (B)Element with atomic number 101 is named after him.
- (C)He invented accurate barometer.
- (D)He authored the textbook - Principles of Chemistry.
Answer: (A)
Solution
Mendeleev published his periodic table in 1869 and arranged the elements by atomic mass, whereas the electron was discovered in 1897 and the nuclear atom in 1911, so no structure of the atom was available to him at the time. Element 101 is mendelevium, named in his honour; he did design an accurate barometer among other instruments; and he wrote the textbook Principles of Chemistry. The incorrect statement is that the structure of the atom was known when he proposed his periodic table.
JEE Main · 2021 · 22 Jul 2021 · Shift 2 · Single correct option