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Unlike HCl, why HBr cannot be prepared b...

Unlike HCl, why HBr cannot be prepared by the action of concentrated sulphuric acid on sodium bromide? Explain.

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MODERN PUBLICATION-p-BLOCK ELEMENTS-EXERCISE
  1. Mention the conditions required to maximise the yield of ammonia in it...

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  2. Which form of sulphur shows paramagnetic behaviour and why ?

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  3. Unlike HCl, why HBr cannot be prepared by the action of concentrated s...

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  4. Write the reaction of white P with NaOH solution .

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  5. Write the IUPAC name of : [Fe (en)3 ]Cl3

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  6. Explain the manufacture of sulphuric acid by contact process.

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  7. What are inter halogen compounds ?

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  8. Name two oxoacids of sulphur.

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  9. How will you manufacture ammonia by Haber process?

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  10. Write any two uses of inert gases.

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  11. State the hybridisation of the central atom and draw the structure of ...

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  12. The first ionisation enthalpy of nitrogen is higher than that of oxyge...

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  13. Give the laboratory preparation of sulphur dioxide and write the chemi...

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  14. SF4 is easily hydrolysed whereas SF6 is not easily hydrolysed. Why ?

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  15. Although electron gain enthalpy of fluorine is less negative as compar...

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  16. Dry chlorine does not act as a bleaching agent. Why?

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  17. Why is H3PO4 tribasic and H3PO3 dibasic?

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  18. Why ICI is more reactive than I2 ?

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  19. Nitrogen exists as diatomic molecule and phosphorus as P4. Why ?

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  20. Describe the manufacture of H2SO4 by contact process?

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