Step 1: Structure of trimethyl cyclohexane.
Trimethyl cyclohexane consists of a cyclohexane ring with three methyl groups attached at various positions.
Step 2: Analyzing the isomers.
- The methyl groups can be attached to different positions on the cyclohexane ring, leading to multiple constitutional isomers. By considering different possible locations for the methyl groups, there are 6 possible isomers.
Step 3: Conclusion.
The total number of constitutional isomers is \( \boxed{6} \).


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The number of chiral carbon centers in the following molecule is ............... 
A tube fitted with a semipermeable membrane is dipped into 0.001 M NaCl solution at 300 K as shown in the figure. Assume density of the solvent and solution are the same. At equilibrium, the height of the liquid column \( h \) (in cm) is ......... 
An electron at rest is accelerated through 10 kV potential. The de Broglie wavelength (in A) of the electron is .............