I'm going to suppose you want the adjusted chemical reaction, using the formulas of the compounds. You can see it in the image attached.
2-methyl-1-butene is obtained as the chief product when a bulky base is used.
The term Dehydrohalogenation is used to describe a type of reaction in which HX is removed from a compound where X is a halogen. This reaction would always lead to an unsaturated product.
2-methyl-1-butene is obtained as the chief product when a bulky base is used.
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