Q. 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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Q. The most commonly used bleaching agent is

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Q. The nucleus of a hydrogen atom consists of

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Q. The heat required to raise the temperature of body by 1 K is called

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Q. The nuclear particles which are assumed to hold the nucleons together are

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

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Q. The octane number of zero is assigned to

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Q. The metal that is used as a catalyst in the hydrogenation of oils is

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Q. The most abundant rare gas in the atmosphere is

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Q. The Latin word formica means ant. The name formic acid is derived from this Latin word because

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Q. The ore which is found in abundance in India is

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Q. The inherited traits of an organism are controlled by

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Q. The heat energy produced when the human body metabolises 1 gram of fat is

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Q. What are the number of moles of CO2 which contains 16 g of oxygen?

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Q. The main use of salt in the diet is to

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Q. The monomer of polythene is

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Q. The luster of a metal is due to

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Q. The number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature is

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Q. The most malleable metal is

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Q. The oil used in the froth floatation process is

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