Which of the following interhalogen compounds is in liquid state at room temperature?

Which from following statements is true regarding the cell emf at 298 K for

${ }^{\ominus} \mathrm{Ni}_{(s)}|\stackrel{+2}{\mathrm{~N}} \mathrm{i}(0.01 \mathrm{M}) \| \stackrel{+}{\mathrm{Ag}}(0.01 \mathrm{M})| \stackrel{\oplus}{\mathrm{Ag}_{(s)}}$

What is EAN of Co in $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$ ?

Identify acidic amino acid from following list represented by three letter symbols.