NTA Abhyas JEE Main2020ChemistryPolymersPractice
Polyethylene is obtained from calcium carbide. C a C 2 + 2 H 2 O → C a O H 2 + C 2 H 2 C 2 H 2 + H 2 → C 2 H 4 n C 2 H 4 → - C H 2 - C H 2 - n Therefore, the amount of polyethylene (in kg) obtained for 64 kg C a C 2 is
Correct answer
28
Step-by-step solution
Moles of C a C 2 = 64 × 1 0 3 64 ≅ 1 × 1 0 3 So from the balanced chemical equation, moles of C 2 H 2 = moles of C 2 H 4 = moles of C a C 2 = 1 × 1 0 3 So moles of polythene = 1 n × 1 × 1 0 3 So weight of polythene = 1 n × 1 × 1 × 28 n kg = 28 kg