MCQ
Among the following configurations, the element which has the highest electron affinity is
- A$[Ne] \,3s^1 ,\,3p^2$
- ✓$[Ne]\, 3s^2\,3p^5$
- C$[Ne]\, 3s^2\,3p^4$
- D$[Ne]\, 3s^2 \,3p^6 \,3d^5\, 4s^1$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
$A$. $Al^{3+}$ $B$. $Cu^{2+}$ $C$. $Ba^{2+}$ $D$. $Co^{2+}$ $E$. $Mg^{2+}$
Choose the correct answer from the options given below.
$(I)\,\,B{r^ - }{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} $ $(II)\,\,\begin{array}{*{20}{c}}
{{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} O{\mkern 1mu} } \\
{{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} ||} \\
{{H_3}C - C - {O^ - }}
\end{array}$ $(III)\,\,C{H_3}C{H_2}{O^ - }$ $(IV)\,\,Ph - {O^ - }$