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Explain the following in one or two sent...

Explain the following in one or two sentances only :
"Orthophosphorous acid is not a tribasic acid".

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Only those halogens are replaceable that are attached to oxygen and contribute to basicity. From the structure it is clear that phosphorous acid `H_3 PO_3` is dibasic.
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CENGAGE CHEMISTRY-P-BLOCK GROUP 15 ELEMENTS - THE NITROGEN FAMILY-Exercises Archives (Subjective)
  1. (i) Write the balanced equations for the reactions when ammonium sulph...

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  2. Write balanced equations for the following : (i) Phosphorus is react...

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  3. Explain the following in one or two sentances only : "Orthophosphor...

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  4. Give balanced equations for the following : Phosphorous reacts with ...

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  5. Write the balanced chemical equations when hypophosphorus acid is heat...

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  6. Explain the following (i)H3 PO3 is a dibasic acid. (ii) Phosphine ...

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  7. Write balanced equation for (i) The preparation of phosphine from Ca...

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  8. Write two resonance structure of N2 O that satisfy the octet rule.

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  9. Write balanced chemical equations for the following : (i) Sodium ni...

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  10. Arrange the following as stated : Increasing order of the extent of ...

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  11. Give reason in one or two sentences. "Ammonium chloride is acidic in...

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  12. Complete and balance the following chemical reactions : Red phosphorus...

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  13. Identify the compounds A and B. PCl5 + SO2 A + B rarr.

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  14. Complete and balance the following reactions. Ca5(PO4)3 F + H2 SO4 +...

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  15. Account for the following : (i)The experimentally determined N-F bon...

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  16. Draw the structure of P4 O10 and identify the number of single and dou...

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  17. A soluble compound of a poisonous element M, when heated with Zn//H2 S...

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  18. Reaction of phosphoric acid with Ca5(PO4)3 F yields a fertiliser 'trip...

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  19. Complete and balance the following equation : P4 O10 + PCl5 rarr.

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  20. In the following equation : A + 2 B + H2 O rarr C + 2 D A = HNO2, ...

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