Qus.No: $18$

Answer:

$47$

Marks

$0$

$($C$)$: $00$:$06$:$54$

Q$.$Type: Digit$/$Numeric

Report $\frac{?}{{?}_{\frac{?}{?}}}$

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Topic: Chemistry of high polymers $($Polymer morphology: amorphous, crystallinity and their transitions$)$

Calculate the percentage of crystallinity of polyethylene samples with density at $20C$ of $926k\frac{g}{m^3}.$ Take the specific volume of crystalline polyethylene as $0\mathrm{.}989{10}^{-3}\frac{m^3}{k}g$ and that of amorphous polyethylene as $1\mathrm{.}160{10}^{-3}\frac{m^3}{k}g.$

Round off to nearest integer.