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$N O_{2}, C l O_{2}, {[C o {(C N)}_{4}]}^{- 2}$ are paramagnetic

$A s H_{4} P_{2} O_{5}$ carry P-O-P bond $H_{2} S_{2} O_{5}$ also carry S-O-S bond

$P C l_{3}$ on reaction with $H_{3} P O_{3}$ in the presence of water produce pyrophosphoric acid

$H_{4} P_{2} O_{6}$ carry P=O, P-P and P-OH bonds (ignore isohypophosphoric acid structure for $H_{4} P_{2} O_{6}$ )

answer is A, D.

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Detailed Solution

$N O_{2}, C l O_{2}, {[C O {(C N)}_{4}]}^{- 2} C a r r y o n e u n p a i r e d e l e c t r o n e a c h H_{4} P_{2} O_{6} H_{2} S_{2} O_{5}$

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$P C l_{3} + H_{3} P O_{3} + 2 H_{2} O \to H_{4} P_{2} O_{5} + 3 H C l$

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