Q.

0.1 mole H3POx is completely neutralised by 5.6 g KOH then the true statement is:

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a

x = 3 and given acid is dibasic

b

x = 4 and given acid has no P-H linkage

c

x = 2 and given acid does not form acid salt

d

all of these

answer is C.

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Detailed Solution

If x = 4H3PO4+3KOH⟶K3PO4+3H2O0.1 mole → 0.3 moleIf x = 3H3PO3+2KOH⟶K2HPO3+2H2O0.1 mole → 0.2 moleIf x=2H3PO2+KOH⟶KH2PO2+H2O0.1 mole→0.1 moleSo, if x = 2, 5.6g KOH will be required.
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0.1 mole H3POx is completely neutralised by 5.6 g KOH then the true statement is: