MCQ
Compare $\pi  - $ bond strength between $B$ and $N$ given in two compounds

$(I)$ $\begin{array}{*{20}{c}}
{{{\left( {C{H_3}} \right)}_3}Si - NB{H_2}}\\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|}\\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,Si{{(C{H_3})}_3}}
\end{array}$     $(II)$ $\begin{array}{*{20}{c}}
{{{\left( {C{H_3}} \right)}_3}C - NB{H_2}}\\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|}\\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{{(C{H_3})}_3}}
\end{array}$

  • A
    There is no $\pi -$ bond character between $B$ and $N$
  • B
    Same in $I$ and $II$
  • C
    $I > II$
  • $II > I$

Answer

Correct option: D.
$II > I$
d

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

The basic ligand is
Angular momentum of an electron in the $n^{th}$ orbit of hydrogen atom is given by
The compound($s$) which react($s$) with $NH _3$ to give boron nitride ($BN$) is(are)

$(A)$ $B$ $(B)$ $B _2 H _6$ $(C)$ $B _2 O _3$ $(D)$ $HBF _4$

The number of nodal planes $'d'$ orbital has
In the following reaction $A \longrightarrow B + C$, rate constant is $0.001\, Ms^{-1}$. If we start with $1\, M$ of $A$ then concentration of $A$ and $B$ after $10\, minutes$ are respectively
A first order reaction has the rate constant, $k =4.6$ $\times 10^{-3} s ^{-1}$. The number of correct statement/s from the following is/are

Given : $\log 3=0.48$

$A.$ Reaction completes in $1000\,s$.

$B.$ The reaction has a half-life of $500\, s$.

$C.$ The time required for $10\, \%$ completion is 25 times the time required for $90 \,\%$ completion.

$D.$ The degree of dissociation is equal to $\left(1-e^{-k t}\right)$.

$E.$ The rate and the rate constant have the same unit.

Correct order for nucleophilic addition reaction :

$(1)$ $\begin{matrix}
   O  \\
   ||  \\
   {{C}_{6}}{{H}_{5}}-C-{{C}_{6}}{{H}_{5}}  \\
\end{matrix}$

$(2)$ $C _{6} H _{5}- CHO$

$(3)$ $p - CH _{3}- C _{6} H _{4}- CHO$

$(4)$ $p - CH _{3} O - C _{6} H _{4}- CHO$

The equilibrium constant of the reaction :

$Cu_{(s)} + 2Ag^+_{(aq)} \rightarrow Cu^{2+}_{(aq)} + 2Ag_{(s)}\,;$

$E^o = 0.46\, V$ at $298\, K$ is

Which of the following pair is $C_2$ -epimer ?
A reagent which gives brilliant red precipitate with Nickel ions in basic medium is