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Q.

Which of the following chemical properties was used by Mendeleev for classification?

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a

Valency of elements

b

Formula of hydrides

c

Both formula of hydrides and oxides

d

Formula of oxides

answer is C.

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Detailed Solution

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Chemical properties used by Mendeleev for classification were formulas of hydrides and oxides.

Mendeleev examined the relationship between the atomic masses of the elements and their physical and chemical properties.

Among chemical properties, Mendeleev concentrated on the compounds formed by elements with oxygen and hydrogen; this shows that elements were classified according to chemical properties also.

Mendeleev selected hydrogen and oxygen because they are very reactive and formed compounds with most elements.

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