Q.

Eka aluminium and eka silicon are known as :

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a

gallium and germanium

b

aluminium and silicon

c

iron and sulphur

d

proton and silicon

answer is A.

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Detailed Solution

Gallium and germanium were not discovered at the time when Mendeleev proposed his periodic table.Mendeleev named these elements as eka-aluminium and eka-silicon because he believed that they would show similar properties as aluminium and silicon respectively.
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