MCQ
How many methyl groups are present in $2, 5-$dimethyl$-4-$ethylheptane
- A$2$
- B$3$
- C$4$
- ✓$5$
✓
Answer
Correct option: D.
$5$
d
(d) $\mathop {H - \mathop {\mathop {\mathop {\mathop C\limits_{|7} }\limits_H }\limits^| }\limits^H - \mathop {\mathop {\mathop {\mathop C\limits_{|6} }\limits_H }\limits^| }\limits^H - \mathop {\mathop {\mathop {\mathop {C - }\limits_{|5\,\,\,\,} }\limits_{C{H_3}} }\limits^{|\,\,\,\,\,\,\,} }\limits^{H\,\,\,\,} \mathop {\mathop {\mathop {\mathop {C\,\, - \,}\limits_{|4\,\,\,\,} }\limits_{H\,\,\,} }\limits^{|\,\,\,\,\,\,\,} }\limits^{C{H_2}C{H_3}} \mathop {\mathop {\mathop {\mathop {C\,\, - \,}\limits_{|3} }\limits_H }\limits^{|\,\,\,} }\limits^H \mathop {\mathop {\mathop {\mathop {C\,\, - \,}\limits_{|2} }\limits_H }\limits^{|\,\,\,} }\limits^{C{H_3}} \mathop {\mathop {\mathop {\mathop C\limits_{1|} }\limits_H }\limits^| }\limits^H - H}\limits_{{\rm{\,2, 5 dimethyl 4 - ethyl\,heptane (5 \,Methyl \,group)}}} $
(d) $\mathop {H - \mathop {\mathop {\mathop {\mathop C\limits_{|7} }\limits_H }\limits^| }\limits^H - \mathop {\mathop {\mathop {\mathop C\limits_{|6} }\limits_H }\limits^| }\limits^H - \mathop {\mathop {\mathop {\mathop {C - }\limits_{|5\,\,\,\,} }\limits_{C{H_3}} }\limits^{|\,\,\,\,\,\,\,} }\limits^{H\,\,\,\,} \mathop {\mathop {\mathop {\mathop {C\,\, - \,}\limits_{|4\,\,\,\,} }\limits_{H\,\,\,} }\limits^{|\,\,\,\,\,\,\,} }\limits^{C{H_2}C{H_3}} \mathop {\mathop {\mathop {\mathop {C\,\, - \,}\limits_{|3} }\limits_H }\limits^{|\,\,\,} }\limits^H \mathop {\mathop {\mathop {\mathop {C\,\, - \,}\limits_{|2} }\limits_H }\limits^{|\,\,\,} }\limits^{C{H_3}} \mathop {\mathop {\mathop {\mathop C\limits_{1|} }\limits_H }\limits^| }\limits^H - H}\limits_{{\rm{\,2, 5 dimethyl 4 - ethyl\,heptane (5 \,Methyl \,group)}}} $
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
In order to oxidise a mixture of one mole of each of $FeC _{2} O _{4}$ $Fe _{2}\left( C _{2} O _{4}\right)_{3}, FeSO _{4}$ and $Fe _{2}\left( SO _{4}\right)_{3}$ in acidic medium, the number of moles of $KMnO _{4}$ required is:
→The $IUPAC$ name of (figure) is
→A student needs to prepare a buffer solution of propanoic acid and its sodium salt with $pH$ $4.$ The ratio of $\frac{\left[ CH _{3} CH _{2} COO ^{-}\right]}{\left[ CH _{3} CH _{2} COOH \right]}$ required to make buffer is .....
→Given : $K _{ a }\left( CH _{3} CH _{2} COOH \right)=1.3 \times 10^{-5}$
Entropy is :
A certain buffer solution contains equal concentration of ${X^ - }$ and $HX$. The ${K_a}$ for $HX$ is ${10^{ - 8}}$. The $pH$ of the buffer is
→For which of the following reactions, $\Delta H$ is equal to $\Delta U$ ?
→Which one of the following salts gives an acidic solution in water
According to Molecular Orbital Theory,
→($A$) $\mathrm{C}_2^{2-}$ is expected to be diamagnetic
($B$) $\mathrm{O}_2{ }^{2+}$ is expected to have a longer bond length than $\mathrm{O}_2$
($C$) $\mathrm{N}_2^{+}$and $\mathrm{N}_2^{-}$have the same bond order
($D$) $\mathrm{He}_2^{+}$has the same energy as two isolated He atoms
In acidic medium, $H_2O_2$ changes $Cr_2O_7^{2-}$ to $CrO_5$ which has two $(-O-O-)$ bonds. Oxidation state of $Cr$ in $CrO_5$ is
→Given below are two statements :
→Statement $I$: In group $13$, the stability of $+1$ oxidation state increases down the group.
Statement $II$: The atomic size of gallium is greater than that of aluminium.
In the light of the above statements, choose the most appropriate answer from the options given below: