Match List I with List II :
List-I Polymer | List-II used for items | ||
---|---|---|---|
A | Nylon 6,6 | I | Buckets |
B | Low density polythene | II | Non-stick utensils |
C | High density polythene | III | Bristles of brushes |
D | Teflon | IV | Toys |
Match the following polymers with their applications:
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:
Neoprene is formed from chloroprene. It is prepared by free radical polymerisation. The monomer of neoprene is chloroprene. It is used for preparing gaskets, conveyor belts etc.