Question

`{:(,"Column-I(Reactions)",,,"Column-II(Product)"),((A),"Borax",overset(Delta)rarr,(p),"BN"),((B),B_(2)H_(6)+H_(2)O,overset(Delta)rarr,(q),B_(2)H_(6)),((C),B_(2)H_(6)NH_(3)("Excess"),overset(Delta)rarr,(r),H_(3)BO_(3)),((D),BCl_(3)+LiAlH_(4),overset(Delta)rarr,(s),NaBO_(2)+B_(2)O_(3)):}`
A. A-p,B-r,C-q,D-s
B. A-t,B-p,C-q,D-s
C. A-r,B-p,C-s,D-q
D. A-r,B-q,C-p,D-s

Answer 1

Correct Answer - 2
(A) `r_(Mg^(2+))//r_(O^(2-))=65//140=0.464` (lies in the range o.414-0.731)`rarr` Octahedral. Coord no. =6
(B) `r_(B^(3+))//r_(O^(2-))=27//140=0.193` (lies in the range 0.155-0.225)`rarr` Planar triangular coord no.=3.
(C) `r_(Mg^(2+))//r_(S^(2-))=65//184=0.353` (lies in the range 0.225-0.414) `rarr` Tetrahedral. Coord no.=4
(D) `r_(Cs^(+))//r_(Cl^(-))=169//181=0.934` (lies in the range 0.732-1) `rarr` BC C. Coord .no.=8