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Mendeleev predicted the existence of an element he called eka-silicon, later identified as:
AGallium
BScandium
CGermanium
DTitanium
Answer & Solution
Correct answer: C. Germanium
1. Mendeleev left gaps in his table for unknown elements.
2. He named them by adding 'eka' (Sanskrit for 'one') to a known element's name.
3. Eka-aluminium was later identified as gallium.
4. Eka-boron turned out to be scandium.
5. Eka-silicon was confirmed as germanium when Winkler discovered it in 1886.
6. So the answer is germanium.
_Source: NCERT Class 10 Science Ch 5 'Periodic Classification of Elements'_
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