MCQ
In following reaction main product will be
- A
- ✓
- C
- D
✓
Answer
Correct option: B.
b
In alkaline medium
In alkaline medium
$-OH$ group is converted into
$-O^{\circleddash}$ which directs the electrophile at its ortho position
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For a given chemical $A \rightarrow B$ at $300\, \mathrm{~K}$ the free energy change is $-49.4\, \mathrm{~kJ} \,\mathrm{~mol}^{-1}$ and the enthalpy of reaction is $51.4\, \mathrm{~kJ} \,\mathrm{~mol}^{-1}$. The entropy change of the reaction is $.....\,\mathrm{J}\, \mathrm{K}^{-1}\, \mathrm{~mol}^{-1} .$
→Peptides are
The number of nodal planes in a $P_x$ orbitals is
→Oxidation number of oxygen in ${O_2}$ molecule is
→Stability order of following carbocation is :
→$(i)$ $\begin{array}{*{20}{c}}
{\begin{array}{*{20}{c}}
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}-CH_2} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,|}
\end{array}} \\
{C{H_3} - {C^ + }} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,|} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}}
\end{array}$
$(ii)$ $\begin{array}{*{20}{c}}
{\begin{array}{*{20}{c}}
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,|}
\end{array}} \\
{C{H_3} - {C^ + }} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,|} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{H}}
\end{array}$
$(iii)$ $\begin{array}{*{20}{c}}
{\begin{array}{*{20}{c}}
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,|}
\end{array}} \\
{C{H_3} - {C^ + }} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,|} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}}
\end{array}$
$(iv)$ $Ph - CH ^{+}-\underline{ CH }_{3}$
The $IUPAC$ name of given compound is :
→The rate for a first order reaction is $0.6932 \times {10^{ - 2}}\,mol\,{l^{ - 1}}\,mi{n^{ - 1}}$ and the initial concentration of the reactants is $1\,M$, ${T_{1/2}}$ is equal to ........ $\min$
→Among the following which property is commonly exhibited by a covalent compound
Given below are two statements
→Statement $-I :$ Retardation factor $\left( R _{ f }\right)$ can be measured in meter/centimeter.
Statement $-II :$ $R _{ f }$ value of a compound remains constant in all solvents.
Choose the most appropriate answer from the options given below