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Give reasons for the following : NO2 is...

Give reasons for the following :
`NO_2` is considered a mixed anhydride.

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`NO_2` dissolves in water to form mixture of `HNO_2` and `HNO_3` and therefore, may be regarded as a mixed anhydride of the two acids.
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ICSE-P-BLOCK ELEMENTS-EXERCISE (PART-II)(DESCRIPTIVE QUESTIONS)(VERY SHORT ANSWER QUESTIONS)
  1. How is pyrophosphoric acid related to orthophosphoric acid?

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  2. Give reasons for the following : (i) Nitric oxide become brown on ex...

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  3. Give reasons for the following : NO2 is considered a mixed anhydride.

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  4. What is the basicity of phosphorus acid ?

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  5. Name the series of salts that are formed by orthophosphoric acid with ...

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  6. What is the state of hybridization of nitrogen in NO3^(-) ion ?

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  7. NO2 readily forms a dimer. Explain.

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  8. What is laughing gas ? How is it prepared?

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  9. On being slowly passed through water, PH3 forms bubbles but NH3 dissol...

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  10. Why does H3PO3 act as a reducing agent but H3PO4 does not?

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  11. Mention one use of hydrazine.

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  12. Basicity of H3PO2, H3PO3 and H3PO4 is not the same. Explain

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  13. What are chalcogens ? Why are group 16 elements called chalcogens ?

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  14. What is the outer shell electronic configuration of chalcogens?

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  15. Name the allotropes of oxygen.

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  16. Which element of group 16 has maximum tendency for catenation ?

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  17. Ionisation enthalpy of nitrogen is more than oxygen because of

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  18. What is hypo?

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  19. Sodium thiosulfate is a salt of which acid ?

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  20. Give one method of preparation of sodium thiosulfate.

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