The gas present in the stratosphere which filters out some of the sun s ultravio

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The gas present in the stratosphere which filters out some of the sun s ultraviolet light and provides an effective shield against radiation damage to living things is



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1) The metallurgical process in which a metal is obtained in a fused state is called

2) The number of d-electrons in Fe2+ (Z = 26) is not equal to that of

3) The first metal used by man was

4) The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is

5) The nucleus of an atom consists of

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