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USHA PUBLICATION-P-BLOCK ELEMENTS( GR-15,GR16,GR17,GR18)-EXERCISE
- Which of the noble gases is not present in the atmosphere?
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- Which of the following has the highest bond energy?
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- Which of the compounds give carbon with sulphuric acid?
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- Identify the catalyst used in Decan process.
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- The bond angle for the hydrides of Gr-15 elements decreases from NH3(1...
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- The number of p - o – p bonds in phosphorous pentoxide (P4O10) are
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- Which of the following is not a method of preparation of ammonia?
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- When ammonia is passed through copper sulphate solution a deep blue so...
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- P4 molecule has tetrahedral structure. The / P – P – P bond angle is
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- Identify the catalyst used in Ostawald’s process.
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- Aqua regia is
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- Why halogens are highly reactive?
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- What happens when SO2 is passed through chlorine water ?
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- What is the 1st noble gas element discovered in earth?
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- Why does SO2 act as bleaching agent only in presence of moisture?
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- OF2 is called as oxygen difluoride and not fluorine oxide. Why?
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- Which noble gas has less than 8 electrons in its valency shell?
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- The inert gas used in beacon lights is
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- Randon was discovered by
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- Which noble gas compound is highly explosive?
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