Hardness of water is due to:
(A) Oxygen
(B) dissolved substances
(C) Hydrogen
(D) too much of salt
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. Why do short sighted persons use concave lenses in spectacles? (a) Concave lens can focus the image of the far off object on the retina (b) Concave lens gives a clear vision (c) Concave lens gives erect image (d) None of these
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Hi i applied specialist officers(computer science) in corporation bank. did any body know about the status of the recruitment?
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