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Grade 11Physical Chemistry

1 mole of H3PO3 reacts with NaOH solution.Select the incorrect statement:
(A)1 mole of NaOH will replace 1 N(AV) H+ IONS from H3PO3
(B)2 mole of NaOH will replace 2 N(AV) H+ ions from H3PO3
(C)3 mole of NaOH will replace 2 N(AV) H+ ions from H3PO3
​(D)On complete neutrilisation of H3PO3,the equivalent mass of H3PO3=41

Profile image of MANAS GOEL
8 Years agoGrade 11
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1 Answer

Profile image of Anshu
8 Years ago
It is adiprotic acid i.e. only two H atoms are replacable from a molecule. So normally the equivalent mass of H3PO3 is 41as its molecular mass is 82. But after complete neutralization of H3PO3 no H atoms are replacable and hence its equivalent mass is not defined. Thus option D) is incorrect.