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

2) The octane number of zero is assigned to

3) The nucleus of a hydrogen atom consists of

4) The ore which is found in abundance in India is

5) The metal that is used as a catalyst in the hydrogenation of oils is