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Explain the following : Iodine forms I...

Explain the following :
Iodine forms `I_3^-` but `F_2^` does not form `F_3^-` ion. Why?

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MODERN PUBLICATION-p-BLOCK ELEMENTS-EXERCISE
  1. Explain the following : Iodine forms I3^- but F2^ does not form F3^-...

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  2. Which of the two NH3 and PH3 is more basic and why ?

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  3. How many significant figures are present in 4.01 × 10*2

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  4. Which of these is not a tree?

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  5. Which of the two NH3 and PH3 is soluble in water and why?

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  6. Arrange H(2)O, NH(3) " and "CH4 in the decreasing order of bond angle.

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  7. The cost of table salt (NaCl) is Rs 2 per Kg. Calculate the cost per m...

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  8. Give an example of compounds in which the oxidation state of nitrogen ...

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  9. Give an example of compounds in which the oxidation state of nitrogen ...

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  10. Give an example of compounds in which the oxidation state of nitrogen ...

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  11. What does the abbreviation T.N .T. stand for ?

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

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  13. Which plants mostly help in nitrogen fixing ?

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  14. Write the formula of the compound formed during ring test of nitrate ....

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  15. Name the oxide of nitrogen Which is blue solid ?

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  16. Name three oxoacids of nitrogen.

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  17. Which oxide of nitrogen is produced by heating lead nitrate ?

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  18. Give one example each of oxyacid of P having the oxidation state +4 .

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  19. What is the chemical formula of laughing gas ? How is it prepared ?

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  20. Among the hydrides of group 15, predict the hydride having most basic ...

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  21. Among the hydrides of group 15, predict the hydride having highest the...

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