Match the items in List with items in List
and select the correct answer from the codes given below the Lists:
| Myopia | Bifocal lens | ||
| Hypermetropia | Cylindrical lens | ||
| Presbyopia | Concave lens | ||
| . Astigmatism | Convex lens |
| Myopia | Concave lens |
| Hypermetropia | Convex lens |
| Presbyopia | Bifocal lens |
| Astigmatism | Cylindrical lens |
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5 g of Na2SO4 was dissolved in x g of H2O. The change in freezing point was found to be 3.820C. If Na2SO4 is 81.5% ionised, the value of x (K

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A solution of m-chloroaniline, m-chlorophenol and m-chlorobenzoic acid in ethyl acetate was extracted initially with a saturated solution of NaHCO3 to give fraction A. The leftover organic phase was extracted with d