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

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