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What is the role of MnO2 in the preparat...

What is the role of `MnO_2` in the preparation of `Cl_2` from HCI?

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SHARAM PUBLICATION-GROUP 17 ELEMENTS (HALOGEN FAMILY)-EXERCISE
  1. Write the order of increase of oxidising power of halogens.

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  2. Which of the following elements does not show positive oxidation state...

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  3. What is the role of MnO2 in the preparation of Cl2 from HCI?

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  4. Which hydracid of halogen has the highest bond energy?

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  5. What is the physical state of bromine at room temperature ?

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  6. Which element of Gr 17 shows hydrogen bonding ?

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  7. HF is less volatile than HCl. Explain.

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  8. Which halogen acid is the strongest acid ?

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  9. Why OF2 should be called oxygen difluoride and not fluorine oxide ?

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  10. Write one oxyacid of chlorine having +7 oxidation state.

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  11. HF is a liquid whereas HCl is a gas. Explain.

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  12. Why is Cl2 a gas but I2 is a solid ?

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  13. Which halogen on reaction with water librates oxygen gas.

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  14. Fill in the blanks : The halogen having metallic lustre is ………..

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  15. Fill in the blanks : The oxidation state of chlorine in chlorous acid ...

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  16. Fill in the blanks : Among all halogen acid ………. Is the weakest reduci...

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  17. Fill in the blanks : A halogens combine with another halogen to form ...

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  18. Fill in the blanks : The ratio of HNO3 and HCl in aquaregia is …………

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  19. Bleaching action of chlorine is due to:

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  20. Fill in the blanks : Cl2 reacts with cold NaOH to give …………..

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