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Write the order of thermal stability of ...

Write the order of thermal stability of the hydrides of group 16 elements.

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The thermal stability of hydrides decreases on moving down the group. This is due to a decrease in the bond dissociation enthalpy (H−E) of hydrides on moving down the group.
Therefore,
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NCERT-THE P-BLOCK ELEMENTS-EXERCISE
  1. What happens when H(3)PO(3) is heated.

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  2. List the important sources of sulphur.

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  3. Write the order of thermal stability of the hydrides of group 16 eleme...

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  4. Why is H(2)O a liquid and H(2)S a gas?

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  5. Which of the following does not react with oxygen directly? Zn,Ti,Pt,F...

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  6. Complete the following reactions: (i) C(2) H(4) + O(2) to (ii)...

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  7. Why does O3 act as a powerful oxidising agent?

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  8. How is O(3) estimated quantitatively ?

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  9. What happens when sulphur dioxide is passed through an aqueous solutio...

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  10. Comment on the nature of two S–O bonds formed in SO(2) molecule. Are t...

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  11. How is the presence of SO2 detected?

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  12. Mention three areas in which H2SO4 plays an important role.

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  13. Write the conditions to maximise the yield of H2SO4 by contact process...

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  14. Why is K(a(2)) ltlt K(a(1)) for H(2) SO(4) in water ?

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  15. Considering the parameters such as bond dissociation enthalpy, electro...

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  16. Give two examples to show the anomalous behavious of fluorine.

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  17. Sea is the greatest source of some halogens. Comment.

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  18. Give the reason for bleaching action of Cl2.

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  19. Name two poisonous gases which can be prepared from chlorine gas.

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  20. Why is ICI more reactive than I2?

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