MCQ
Pure conc. $HN{O_3}$makes iron passive as the surface is covered with protective layer of
- A$F{e_2}{O_3}$
- B$FeO$
- ✓$F{e_3}{O_4}$
- D$Fe{(N{O_3})_3}$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
$(iii)$ $C{H_3} - C(C{H_3})(OH) - C{H_3}$ were treated with Lucas reagent (Conc. $HCl + ZnC{l_2}).$
What results do you expect at room temperature
$Pt(s)|\mathop {{H_2}(g)}\limits_{1\ atm} |HA\,\,\,\,\,\mathop {1\,M}\limits_{({K_a} = {{10}^{ - 7}})} \,\,||\,HB\,\,\,\,\,\mathop {1\,M}\limits_{({K_1} = {{10}^{ - 5}})}$
$\,|\mathop{{H_2}(g)}\limits_{1\ atm} |Pi(s)$
Reason : Lower the activation energy, faster is the reaction.