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STD 11 - 4. Chemical bonding and molecular structure — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 11 - 4. Chemical bonding and molecular structure4 Marks
MCQ
The hybridization of the central atom will change when
  • A
    $NH_3$ combines with $H^+$
  • B
    $H_3BO_3$ combines with $OH^-$
  • C
    $NH_3$ forms $NH_2^-$
  • D
    $H_2O$ combines with $H^+$
✓

Answer

$(b)$ $\underset{s{{p}^{3}}}{\mathop{\ddot{N}{{H}_{3}}}}\,+{{H}^{+}}\to \underset{s{{p}^{3}}}{\mathop{NH_{4}^{+}}}\,$

                 $\underset{s{{p}^{3}}}{\mathop{2N{{H}_{3}}}}\,\rightleftarrows \underset{s{{p}^{3}}}{\mathop{NH_{2}^{-}}}\,+\underset{s{{p}^{3}}}{\mathop{NH_{4}^{+}}}\,$

$\underset{s{{p}^{2}}}{\mathop{{{H}_{3}}B{{O}_{3}}}}\,+O{{H}^{-}}\to \underset{s{{p}^{3}}}{\mathop{{{[B{{(OH)}_{4}}]}^{-}}}}\,$

                  $\underset{s{{p}^{3}}}{\mathop{{{H}_{2}}O}}\,+{{H}^{+}}\rightleftarrows \underset{s{{p}^{3}}}{\mathop{{{H}_{3}}{{O}^{+}}}}\,$

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$\underset{(a)}{\mathop{\begin{matrix}
   \,\,\,\,\,\,C{{H}_{3}}  \\
   |  \\
   C{{H}_{3}}-C-C{{H}_{3}}  \\
   |  \\
   \,\,Br  \\
\end{matrix},}}\,\,\,\,\underset{(b)}{\mathop{\begin{matrix}
   C{{H}_{3}}-CH-C{{H}_{3}},  \\
   |\,\,\,\,  \\
   Br\,\,  \\
\end{matrix}}}\,\underset{(c)}{\mathop{C{{H}_{3}}-CH-Br}}\,$

Compare rate of $E_2$ reaction

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