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01. | Diamond is an allotropic form of: | |||||||||||
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02. | Among the various allotropes of carbon, | |||||||||||
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03. | Carbon, diamond and graphite are together called | |||||||||||
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04. | Potassium nitrate is used in | |||||||||||
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05. | Permanent hardness of water may be removed by the addition of | |||||||||||
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06. | Soda water contains | |||||||||||
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07. | Which of the following is in liquid form at room temperature? | |||||||||||
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08. | The main constituents of pearls are | |||||||||||
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09. | Potassium Permanganate is used for purifying drinking water, because | |||||||||||
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10. | What does soda water contains? | |||||||||||
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11. | Bell metal is an alloy of | |||||||||||
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12. | Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products? | |||||||||||
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13. | LPG consists of mainly | |||||||||||
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14. | Which of the following is the lightest metal? | |||||||||||
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15. | Which of the following does not contain a coinage metal? | |||||||||||
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16. | From which mineral is radium obtained? | |||||||||||
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17. | Which is the metal that pollutes the air of a big city? | |||||||||||
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18. | Which of the following are the ingredients of gun metal? | |||||||||||
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19. | In fireworks, the green flame is produced because of | |||||||||||
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20. | Marsh gas is | |||||||||||
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