MCQ
A single substitution of $H$ atom in an alkane of molar mass by $72\text{ g/mole}$ on chlorination produces only one product. The alkane is :
- A$n-$ pentane
- B$2-$ methyl butane
- ✓$2, 2-$ dimethyl propane
- D$n-$ butane
✓
Answer
Correct option: C.
$2, 2-$ dimethyl propane
In $2,2-$ Dimethylpropane the central carbon atom is quaternary, meaning all four of its valencies are satisfied by Carbon atoms; which implies that there are no Hydrogen atoms which can be substituted by Chlorine $($or halogen$),$ and all the remaining $4$ carbon atoms are identical, so substitution on any one of those will result in the same compound.
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