KVPY2018ChemistrySome Basic Concepts of Chemistry
A solution of 20 . 2   g of 1 , 2 -dibromopropane in M e O H upon heating with excess Z n produces 3 . 58   g of an unsaturated compound X   . The yield ( % ) of X is closest to [Atomic weight of Br is 80 ]
Options
- A18
- B85
- C89
- D30
Correct answer
B. 85
Step-by-step solution
Moles of 1 , 2 -dibromo propane = 20 . 2 202 = 0 . 1 mole Moles of prop- 1 -ene = 3 . 58 42 = 0 . 085 mole % yield = 0 . 085 01 × 100 = 85 %