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

$[A]$ $HClO_4$ is more acidic than $\mathrm{HClO}$ because of the resonance stabilization of its anion

$[B]$ $HClO_4$ is formed in the reaction between $Cl_2$ and $H_2 O$

$[C]$ The central atom in both $HClO_4$ and $HClO$ is $s p^3$ hybridized

$[D]$ The conjugate base of $HClO_4$ is weaker base than $H_2 O$

$(1)$ $Fe^{3+}$ gives brown colour with potassium ferricyanide

$(2)$ $Fe^{2+}$ gives blue colour with potassium ferricyanide

$(3)$ $Fe^{3+}$ gives red colour with potassium thiocyanate

$(4)$ $Fe^{2+}$ gives brown colour with ammonium thiocyanate