MCQ
The absolute configuration of the compound is


- A$2S,\,\,3R$
- B$2S,\,\,3S$
- ✓$2R,\,\,3S$
- D$2R,\,\,3R$

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
(Atomic numbers $Ce =58, Gd =64$ and $Eu =63 .)$
$(a)$ $\left( NH _{4}\right)_{2}\left[ Ce \left( NO _{3}\right)_{6}\right]$
$(b)$ $Gd \left( NO _{3}\right)_{3}$ and
$(c)$ $Eu \left( NO _{3}\right)_{3}$
Answer is :
$(CH_3)_2CHCH_2N(CH_2CH_3)_2 \xrightarrow{C{{H}_{3}}I}\xrightarrow[{{H}_{2}}O]{A{{g}_{2}}O}\xrightarrow{heat}$ products
$S _{8( s )}+ a OH ^{-}_{( aq )} \rightarrow b S ^{2-}_{( aq )}+ c S _{2} O _{3}{ }^{2-}{ }_{( aq )}+ d H _{2} O _{(\ell)}$
The values of $'a'$ is ............ (Integer answer)
