For the half-cell reaction Hg²⁺(aq) + 2 e^- → Hg(l), E° = 0.854 V. This means that 

(a) Hg(l) is more readily oxidized than H₂(g);

(b) Hg²⁺(aq) is more readily reduced than H⁺(aq); 

(c) Hg(l) will dissolve in 1M HCl; 

(d) Hg(l) will displace Zn(s) from an aqueous solution of Zn²⁺ ion.