Question

An ion is reduced to the element when it absorbs $6\times {10}^{20}$ electrons. The number of equivalents of the
ion is:

• A. 0.0001
• B. 0.01
• C. 0.1
• D. 0.001

Answer 1

The correct option is D 0.001

$\text{Calculating number of equivalents of the ion}$

One equivalent of an element is the amount which reacts with one mole of electron.

Thus, $6.022\times {10}^{23}$ electrons are reacted by one g-equivalent of ion.

i.e., number of g-equivalents which absorbs $6.022\times {10}^{20}$ electrons

$=\frac{6.022\times {10}^{20}}{6.022\times {10}^{23}}$

$=0.001$ equivalents

So, option (c) is the correct answer.