Which of the following is a correct statement | vedclass

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(B) $1$. $H_3PO_3$ (phosphorous acid) has two $P-OH$ bonds and one $P-H$ bond,making it dibasic and a reducing agent. So,option $A$ is incorrect.$2$.

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Pyrosilicate is $Si_2O_7^{6-}$ with one oxygen atom shared

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(B) $1$. $H_3PO_3$ (phosphorous acid) has two $P-OH$ bonds and one $P-H$ bond,making it dibasic and a reducing agent. So,option $A$ is incorrect.$2$. Pyrosilicate ion is $Si_2O_7^{6-}$,which is formed by sharing one oxygen atom between two $SiO_4^{4-}$ tetrahedra. This is correct.$3$. Caro's acid $(H_2SO_5)$ contains a peroxo bond,but oleum $(H_2S_2O_7)$ does not. So,option $C$ is incorrect.$4$. In $BrF_5$ (square pyramidal geometry),the apical $Br-F$ bond is shorter than the equatorial $Br-F$ bonds due to the repulsion from the lone pair. So,option $D$ is incorrect.

Which of the following is a correct statement?

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