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Q.

Is it true Eka boron and several other metals are predicted by the Mendeleev’s before their discovery?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is true.
The four predicted elements, eka-boron (Eb), eka-aluminium (Ea), eka-manganese (Em), and eka-silicon (Es), each of which filled a Mendeleev-assigned space in the periodic table, turned out to be accurate forecasters of the properties of scandium, gallium, technetium, and germanium, respectively. Given the information, it is clear that the assertion made is accurate.
 
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