Teaching UKPSC Lecturer Mock Test Series 2024 General Science Chemistry Classification of Elements and Periodicity in Properties
Choose the incorrect statement from the following:
i. When Mendeleev started his work on the periodic table, 63 elements were known.
ii. Mendeleev focused on compounds formed by elements containing oxygen and hydrogen.
iii. Mendeleev investigated the relationship between the atomic numbers of elements.
iv. Mendeleev investigated the relationship between the physical and chemical properties of elements.
1
iii
2
ii
3
i
4
iv