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

$N{H_4}^ +  + {S^{ - 2}} \rightleftharpoons N{H_3} + H{S^ - }$

$(a)$ Number of $S-S$ bonds in $H_2S_nO_6$ are $(n +1)$

$(b)$ When $F_2$ reacts with $H_2O$ it forms $HF,$ $O_2$ & $O_3.$

$(c)$ $XeF_6$ on hydrolysis shows disproportionation reaction

$(d)$ $Al$ metal on reacting with dilute $NaOH$ gives a white precipitate of $Al (OH)_3$ as a final product

$A: \left[ Ni ( en )_{3}\right]^{2+}, B :\left[ Ni \left( NH _{3}\right)_{6}\right]^{2+}, C :\left[ Ni \left( H _{2} O \right)_{6}\right]^{2+}$