pBlock ElementsII - Result Question 100

####96. Explain the following

(1989,2M)

(i) H3PO3 is a dibasic acid.

(ii) Phosphine has lower boiling point than ammonia.

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Solution:

  1. (i) In H3PO3, there is only two replaceable H, hence dibasic

(ii) NH3 molecules are associated by intermolecular H bonds. 97. (i) 2H3PO2 hypophosphorus   acid ΔPH3+H3PO4 (Disproportionation)

(ii) NaClO3+SO210H+NaCl+S+5H2O



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