Give main product of the following reaction. (in one step) (i) 1, 2-dibromo propane + alcoholic KOH (ii) 1, 1, 2,2-tetrabromo ethane + zinc powder in methanol (iii) 1,1,2,2-tetrabromo propane + zinc powder in methanol. (iv) Reaction occur on passing of hydrogen gas through carbon electrode at high temperature in electric arc.

Give main product of the following reaction. (in one step) (i) 1, 2-d

1.	Give main product of the following reaction. (in one step) (i) 1, 2-dibromo propane + alcoholic KOH (ii) 1, 1, 2,2-tetrabromo ethane + zinc powder in methanol (iii) 1,1,2,2-tetrabromo propane + zinc powder in methanol. (iv) Reaction occur on passing of hydrogen gas through carbon electrode at high temperature in electric arc.
Answer» Solution : (iii) `underset("1,1,2,2-tetrabromo PROPANE")(CH_(3)CBr_(2)CHBr_(2) + 2Zn) rarr underset("PROPYNE")(CH_(3)C)-=CH+2ZnBr_(2)` (iv) `2C+H_(2) underset(3270K)overset("Electric arc")rarr HC -= CH`