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| 01. | The nucleus of a hydrogen atom consists of | |||||||||||
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| 02. | The hottest part of the gas flame is known as | |||||||||||
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| 03. | The main use of salt in the diet is to | |||||||||||
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| 04. | The major constituent of air is | |||||||||||
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| 05. | The main active constituent of tea and coffee is | |||||||||||
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| 06. | The National Chemical Laboratory is situated in | |||||||||||
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| 07. | The human body is made up of several chemical elements; the element present in the highest proportion (65%) in the body is | |||||||||||
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| 08. | The inert gases are ____ in water | |||||||||||
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| 09. | The gas used for artificial ripening of green fruit is | |||||||||||
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| 10. | The gas used in the manufacture of vanaspati from vegetable oil is | |||||||||||
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| 11. | The mass number of a nucleus is | |||||||||||
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| 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 | |||||||||||
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| 13. | The nuclear particles which are assumed to hold the nucleons together are | |||||||||||
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| 14. | The monomer of polythene is | |||||||||||
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| 15. | The main chemical constituent of clay is | |||||||||||
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| 16. | The most commonly used bleaching agent is | |||||||||||
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| 17. | The first metal used by man was | |||||||||||
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| 18. | The molecules of which gas have highest speed? | |||||||||||
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| 19. | The Latin word formica means ant. The name formic acid is derived from this Latin word because | |||||||||||
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| 20. | The inexpensive and commonly used variety of glass is called soda glass. It is called so because | |||||||||||
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