Answer this plzz 1,2,3
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O is optic centre. F1 is centre of curvature. O to F2 is radius of curvature. Middle line passimg throigh O is priciple axis
3. substance which take part in to increase the rate of chemical reaction which is not consumed.nickel, palladium, plantium is used for hydregenation.
3. substance which take part in to increase the rate of chemical reaction which is not consumed.nickel, palladium, plantium is used for hydregenation.
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