MCQ
$IUPAC$ name of the following compound will be
- A$3,4-$ Dimethyl octa $-1,3,6-$ triene
- ✓$3,7-$ Dimethyl octa $-1,3,6-$ triene
- C$2,6-$ Dimethyl octa $-2,5,7-$ triene
- D$2,6-$ Dimethlyl octa $-1,5,7-$ triene
✓
Answer
Correct option: B.
$3,7-$ Dimethyl octa $-1,3,6-$ triene
b
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$\begin{array}{*{20}{c}}
{\,\,\,\,\,\,O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{\,\,\,\,\,\,\,||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{C{H_3} - C - N{H_2}\xrightarrow[\Delta ]{{B{r_2} + KOH}}C{H_3} - N{H_2}}
\end{array}$
→{\,\,\,\,\,\,O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{\,\,\,\,\,\,\,||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{C{H_3} - C - N{H_2}\xrightarrow[\Delta ]{{B{r_2} + KOH}}C{H_3} - N{H_2}}
\end{array}$
Intermediates of the reaction is/are
Which of the following represents a chelating ligand
Which of the following statements are not correct?
→$A.$ The electron gain enthalpy of $F$ is more negative than that of $Cl$
$B.$ Ionization enthalpy decreases in a group of periodic table
$C.$ The electronegativity of an atom depends upon the atoms bonded to it.
$D.$ $Al _2 O _3$ and $NO$ are examples of amphoteric oxides.
Choose the most appropriate answer from the options given below:
Energy of orbit
The element which exists in liquid state for a wide range of temperature and can be used for measuring high temperature is :-
For $2\ moles$ of $He$ (ideal gas), find the work done in a process where it is heated from $200\ K$ to $400\ K$ such that the enthalpy of the gas varies as : $H = 10\ V^2$
→In the given reaction $[X]$ will be :
→The colour of the $\mathrm{X}_2$ molecules of group $17$ elements changes gradually from yellow to violet down the group. This is due to
→[$A$] the physical state of $\mathrm{X}_2$ at atom temperature changes from gas to solid down the group
[$B$] decrease in $HOMO-LUMO$ gap down the group
[$C$] decrease in $\pi^*-\sigma^*$ gap down the group
[$D$] decrease in ionization energy down the group
Which is incorrect
Empirical formula of a hydrocarbon containing $80\%$ carbon and $20\%$ hydrogen is
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