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(a) Write chemical equation involved in ...

(a) Write chemical equation involved in the preparation of `H_(3)PO_(3)`.
(b) What is basicity of `H_(3)PO_(2)` ?
(c) What happens when orthophosphorus acid `(H_(3)PO_(3))` is heated ?

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PRADEEP-P-BLOCK ELEMENTS -SHORT ANSWER QUESTIONS
  1. Give structures of P(4)O(6) and P(4)O(10)

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  2. Draw the structure of the following : (a) H(3)PO(2) (b) H(3)PO(3) ...

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  3. (a) Write chemical equation involved in the preparation of H(3)PO(3). ...

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  4. Arrange the following in increasing order of the property indicated : ...

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  5. Why are elements of oxygen family called chalcogens ?

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  6. Give suitalbe examples to show that sulphur has a strong tendency for ...

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  7. What is catenation ? Explain why oxygen is diatomic, while sulphur is ...

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  8. Explain : (a) Oxygen molecule has formula O(2) whilst sulphur is S(8...

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  9. Describe the hydrides of group 16 under the following heads : (i) Vo...

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  10. H(2)O is liquid while H(2)S is a gas at room temperature. Explain.

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  11. Compare the structures of the following : (i) SO(2) and SiO(2) (ii) SO...

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  12. SO(2) can act as an oxidising agent as well as a reducing agent but SO...

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  13. Discuss the structures of (i) SF(6) (ii) SF(4)

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  14. Anomalous behaviour of oxygen is due to

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  15. Give two methods of preparation of dioxygen (O(2)) and chemical reacti...

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  16. (a) Draw the structure of O(3)molecule. (b) How does ozone react wit...

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  17. Give reactions of ozone with following (i) Ag(2)O (ii) H(2)O(2) (iii...

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  18. Which is an oxidising as well as a reducing agent in the following?

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  19. Oxygen (O(2)) and ozone (O(3)) are

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  20. What is allotropy ? Write the various allotropic forms of sulphur.

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