The correct formulae of chlorides of Eka-silicon and Eka- aluminium predicted by Mendeleev, respectively are ____________.

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GeCl₄, GaCl₂

GeCl₂, GaCl₃

GeCl₄, GaCl₃

GaCl₂, GeCl₃

answer is D.

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Detailed Solution

The correct formulae of chlorides of Eka-silicon and Eka- aluminium predicted by Mendeleev are GeCl₄ and GaCl3, respectively.

Germanium is known as Eka- silicon. According to Mendeleev’s periodic table, it belongs to the 4th group. The valency of Germanium is 4, and it requires to lose four electrons to attain a stable configuration, and at the same time, 1 chlorine atom requires 1 electron to attain a stable configuration. So, four chlorine atoms are required to make a stable compound with Ge.

Thus, its chloride is GeCl₄.

Gallium is known as Eka- aluminium. In Mendeleev’s periodic table, it occupies the 3rd group and thus has a valency of 3. Gallium requires to lose three electrons to attain a stable configuration. Thus, three chlorine atoms are required to form a stable compound with gallium.

Hence, the chloride of this compound will be GaCl₃.

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