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Question


Which chemical compounds of elements were used by Mendeleev to gauge their chemical similarities?


Options:
A .   Oxides
B .   Chlorides
C .   Hydrides
D .   Sulphites
Answer: Option A
:
A and C

Mendeleev considered oxides and hydrides of elements for classifying their properties. This is because oxygen and hydrogen reacts with most of the elements to form compounds due to their high reactivity.



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