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What is the basicity of phosphorus acid ...

What is the basicity of phosphorus acid ?

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ICSE-P-BLOCK ELEMENTS-EXERCISE (PART-II)(DESCRIPTIVE QUESTIONS)(VERY SHORT ANSWER QUESTIONS)
  1. Give reasons for the following : (i) Nitric oxide become brown on ex...

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

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  3. What is the basicity of phosphorus acid ?

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

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

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  6. NO2 readily forms a dimer. Explain.

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

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

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

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  10. Mention one use of hydrazine.

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

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

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

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  14. Name the allotropes of oxygen.

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

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

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  17. What is hypo?

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  18. Sodium thiosulfate is a salt of which acid ?

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  19. Give one method of preparation of sodium thiosulfate.

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  20. Which form of sulphur shows paramagnetic behaviour ?

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