11. The main buffer system of the human blood is
12. 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
13. The most commonly used bleaching agent is
14. The nucleus of a hydrogen atom consists of
15. The heat required to raise the temperature of body by 1 K is called
16. The nuclear particles which are assumed to hold the nucleons together are
17. The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is
18. The octane number of zero is assigned to
19. The metal that is used as a catalyst in the hydrogenation of oils is
20. The most abundant rare gas in the atmosphere is
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