Question bank/JEE Main/Chemistry

JEE MainChemistryModerateMole concept

When 100g of ethylene polymerises entirely to polyethene, the
weight of polyethene formed as per the equation n(C2H4) → (-CH2-CH2-)n
is

Show answer and solution
By applying POAC for C atoms
moles of ethylene × 2 = mole of polythene × n × 2
100g28×2=wt. of polethene28×n×n×2\frac{100g}{28} \times 2 = \frac{wt.\ of\ polethene}{28 \times n} \times n \times 2
wt. of polyethene = 100 g

Source: Grass-G / CH-18 Chemistry Paper 27 Nov. Third.docx

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