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
Which of the followng pair are metamers
$CO$ has same electrons as or the ion that is isoelectronic with $CO$ is
→At $25\,^oC$ a weak acid $HX$ has the dissociation constant $1 \times 10^{-5}$ . It forms a salt $NaX$ on reaction with alkali. The $\%$ of degree of hydrolysis of $0.1\,M$ solution of $NaX$ is .....$\%$
→Which pairs of the salts should have identical solubilities in methanol?
Correct statement about the given chemical reaction is :
$1 , 2$ di-bromo cyclohexane on dehydro halogenation gives
→The standard entropy change for the reaction $4 Fe ( s )+3 O _{2}( g ) \rightarrow 2 Fe _{2} O _{3}( s )$ is $-550\, JK ^{-1}$ at $298 \,K$.
→[Given : The standard enthalpy change for the reaction is $-165\, kJ\, mol ^{-1}$. The temperature in $K$ at which the reaction attains equilibrium is ... . (Nearest Integer)
Among the following, the Newmann projections of meso- $2, 3$ -butanediol are
→The coordination numbers of $Co$ and $Al$ in $[Co(Cl)(en)_2]Cl$ and $K_3[Al(C_2O_4)_3]$, respectively, are (en $=$ ethane $-1,2-$ diamine)
→In the Liebermann's nitroso reaction, sequential changes in the colour of phenol occurs as