STD 12 - p -Block elements - ll — NEET STD 11 Science — Question

$A$. $\mathrm{Be} \rightarrow \mathrm{Be}^{-}$

$B$. $\mathrm{N} \rightarrow \mathrm{N}^{-}$

$C$. $\mathrm{O} \rightarrow \mathrm{O}^{2-}$

$D$. $\mathrm{Na} \rightarrow \mathrm{Na}^{-}$

$E$. $\mathrm{Al} \rightarrow \mathrm{Al}^{-}$

Choose the most appropriate answer from the options given below :

(First dissociation constant of $H _{2} CO _{3}=4.0 \times 10^{-7}$$\log 2=0.3 ;$ density of the soft $\left.\operatorname{drink}=1\, g\, mL ^{-1}\right)$