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27. It covers a large area which could be used for agriculture etc
35. To prevent female infanticide
36. a)Ca
b) Element having 4 valence electrons
38.a)Ability of a Lens to converge or diverge a light ray
b)P = 1/f
= 1/2
= -0.5
35. To prevent female infanticide
36. a)Ca
b) Element having 4 valence electrons
38.a)Ability of a Lens to converge or diverge a light ray
b)P = 1/f
= 1/2
= -0.5
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