Rayon is not natural polymer. It is semi-synthetic, rest all are natural polymers.
So, the correct option is (D): Rayon.
List II | List II |
---|---|
A. Elastomeric polymer | I. Urea formaldehyde resin |
B. Fibre Polymer | II. Polystyrene |
C. Thermosetting Polymer | III. Polyester |
D. Thermoplastic Polymer | IV. Neoprene |
Polymers used for making toys are?
Let one focus of the hyperbola $ \frac{x^2}{a^2} - \frac{y^2}{b^2} = 1 $ be at $ (\sqrt{10}, 0) $, and the corresponding directrix be $ x = \frac{\sqrt{10}}{2} $. If $ e $ and $ l $ are the eccentricity and the latus rectum respectively, then $ 9(e^2 + l) $ is equal to:
The largest $ n \in \mathbb{N} $ such that $ 3^n $ divides 50! is:
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