MCQ
$\xrightarrow[{hv}]{{NBS}}$ Product ;
Which product will not likely to form
- A
- ✓
- C
- D
✓
Answer
Correct option: B.
b
In presence of $NBS$ , Allylic/Benzylic substitution take place
In presence of $NBS$ , Allylic/Benzylic substitution take place
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Compound $(X)$ $\xrightarrow{{AgN{O_3}}}$ Precipitate
Compound $(X)$ $\xrightarrow[{M{e_2}S}]{{{O_3}}}$ $\begin{array}{*{20}{c}}
{\,\,\,\,\,\,\,O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O\,\,\,\,\,\,\,\,\,\,O\,\,\,\,} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||\,\,\,\,\,\,\,\,\,\,||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{H - C - C{H_2} - C{H_2} - C - C - H}
\end{array}$ $\begin{array}{*{20}{c}}
{\,\,O\,\,\,\,\,\,O\,\,\,\,\,\,\,\,\,\,} \\
{||\,\,\,\,\,\,\,\,||\,\,\,\,\,\,\,\,\,} \\
{H - C - C - O - H}
\end{array}$ $ + \begin{array}{*{20}{c}}
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{CHO} \\
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Match List $I$ with List $II$
→| LIST $I$ (Technique) | LIST $II$ (Application) |
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| $B$. Fractional distillation | $II$Aniline - Water mixture |
| $C$. Steam distillation | $III$Separation of crude oil fractions |
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Choose the correct answer from the options given below:
The number of given orbitals which have electron density along the axis is $..........$. $p _{ x }, p _{ y }, p _{ z }, d _{ xy }, d _{ yz }, d _{ xz }, d _z ^2, d _{ x ^2- y ^2}$
→Which of the following is paramagnetic ?
Calculate the $N-N$ bond energy in $N_2H_4$ from given bond enthalpy data.
$\varepsilon_{N-H} = 393\, kJ/mole$
$\varepsilon_{H-H} = 436\, kJ/mole$
$\Delta H_{vap}[N_2H_4(l)] = 18\, kJ / mole$
$N_2H_4(l) + H_2(g) \to 2NH_3(g) : \Delta H = -142\, kJ/mole$
→$\varepsilon_{N-H} = 393\, kJ/mole$
$\varepsilon_{H-H} = 436\, kJ/mole$
$\Delta H_{vap}[N_2H_4(l)] = 18\, kJ / mole$
$N_2H_4(l) + H_2(g) \to 2NH_3(g) : \Delta H = -142\, kJ/mole$
.......$ kJ/mole$
Which of the following compounds is most stable ?
$\begin{array}{*{20}{c}}
{C{H_3} - CH - C - O - C{H_3} + 2C{H_3}MgBr\, \to \,A} \\
{||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}
\end{array}$
→{C{H_3} - CH - C - O - C{H_3} + 2C{H_3}MgBr\, \to \,A} \\
{||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}
\end{array}$
$\xrightarrow[\Delta ]{{{H^ \oplus }}}\,B$
The product $"B"$ is
$s{p^3}$ hybridization leads to which shape of the molecule
→