Which statement is false?

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(D) $1$. In the $3d$ series,the effective nuclear charge $(Z_{eff})$ increases by $0.15$ for each subsequent element due to poor shielding of $d$-elec

Vedclass · Accepted Answer

$H_3PO_2 > H_3PO_3 > H_3PO_4$ acidic character

Vedclass · Answer

(D) $1$. In the $3d$ series,the effective nuclear charge $(Z_{eff})$ increases by $0.15$ for each subsequent element due to poor shielding of $d$-electrons,which is a correct statement.$2$. $_{90}Th$ (Thorium) is often considered an exception in block classification because it is a $f$-block element but does not contain $f$-electrons in its ground state,which is a correct statement.$3$. The process $P + e^{-} 	o P^{-}$ is exothermic because Phosphorus has a half-filled $p$-orbital $(3p^3)$,making the addition of an electron release energy,which is a correct statement.$4$. The acidic character of oxoacids of Phosphorus depends on the number of $P-OH$ groups. The order is $H_3PO_4 > H_3PO_3 > H_3PO_2$. The given statement $H_3PO_2 > H_3PO_3 > H_3PO_4$ is false.

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