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USHA PUBLICATION-P-BLOCK ELEMENTS( GR-15,GR16,GR17,GR18)-EXERCISE
- How is H2S prepared in the laboratory ?
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- How can you prepare HCl gas in the laboratory?
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- Explain why F2 does not form oxyacids.
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- Explain why halogens are strong oxidising agents.
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- Explain why HBr and HI can't be prepared by heating NaBr and Nal with ...
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- How does sulphuric acid react with sodium bromide ?
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- What is charring of sugar ?
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- HF is less volatile than HCl. Explain.
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- Do as directed : F2,Cl2,Br2,I2 (increasing bond dissociation energy)
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- Do as directed : H2O,H2S, H2Se, H2Te (Increasing acidic strength)
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- HF can form the salt KHF2 while HCl does not form KHCl2. Explain.
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- Give the principle of manufacture of H2SO4 by contact process.
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- What is the action of O3 on acidified FeSO4 solution ?
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- How does xenon react with O2F2 at -118^@C ?
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- Why does xenon form compounds only with fluorine and oxygen ?
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- What happens when H2S gas is passed through chlorine water ?
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- Why is H2SO4 called as king of the chemicals?
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- Tailing of mercury is due to formation of .
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- What happens when copper turnings are heated with conc. H2SO4 ?
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- Explain why SO2 is more powerful reducing agent in alkaline medium tha...
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