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USHA PUBLICATION-P-BLOCK ELEMENTS( GR-15,GR16,GR17,GR18)-EXERCISE
- A mixture of three gases A, B, C is passed first through acidified K2C...
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- Why do noble gases have comparatively large atomic size in a particula...
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- Why are halogens coloured ?
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- Arrange H2O,H2S,H2Se,H2Te in order of increasing thermal stability.
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- How does ozone react with silver metal ?
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- What happens when PbS is treated with ozone ?
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- The Halogen which has the highest electron affinity :
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- Which of the halogens (excluding astatine) has highest electronegativi...
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- Which of the halogens (excluding astatine) is strongest oxidant ?
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- Which of the halogens (excluding astatine)has lowest ionisation energy...
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- 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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