$\mathrm{PF}_{3} \rightarrow$ Lewis base (presence of lone pair on $p$ atom)
$\mathrm{CF}_{4} \rightarrow$ Complete octet
$SiF_{4} \rightarrow$ Lewis acid (empty $d-$orbital in $Si-$atom)
જ્યાં $pK_1 , pK_2, pK_3$પ્રથમ આયનીકરણ અચળાંક છે. ખોટો ક્રમ કયો છે
$(i)\, CO_2 + H_2O $ $\rightleftharpoons$ $ H_2CO_3 (ii) NH_3+ H_2O $ $\rightleftharpoons$ $ NH_4OH (iii) HCl + H_2O$ $\rightleftharpoons $ $ Cl^-+ H_3O^+$