The sum of the total number of Cr-O bonds in | vedclass

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Question

(C) In a chromate ion $(CrO_4^{2-})$,the structure consists of one $Cr$ atom bonded to four oxygen atoms. There are two double bonds and two single bo

Vedclass · Accepted Answer

$18$

Vedclass · Answer

(C) In a chromate ion $(CrO_4^{2-})$,the structure consists of one $Cr$ atom bonded to four oxygen atoms. There are two double bonds and two single bonds,totaling $6$ $Cr-O$ bonds $(4\sigma + 2\pi)$.In a dichromate ion $(Cr_2O_7^{2-})$,there are two $Cr$ atoms linked by one bridging oxygen atom $(Cr-O-Cr)$. Each $Cr$ atom is also bonded to three terminal oxygen atoms. This results in a total of $12$ $Cr-O$ bonds $(8\sigma + 4\pi)$.The sum of the total number of $Cr-O$ bonds is $6 + 12 = 18$.

List-$I$ (Complex)	List-$II$ (Color)
$A. [Ni(en)_3]^{2+}$	$I. \text{Green}$
$B. [Ni(H_2O)_4(en)]^{2+}$	$II. \text{Blue}$
$C. [Ni(H_2O)_6]^{2+}$	$III. \text{Pale blue}$
$D. [Ni(H_2O)_2(en)_2]^{2+}$	$IV. \text{Violet}$

The sum of the total number of $Cr-O$ bonds in chromate $(CrO_4^{2-})$ and dichromate $(Cr_2O_7^{2-})$ ions is:

Similar Questions

Match the following complexes in List-$I$ with their colors in List-$II$:
List-$I$ (Complex) List-$II$ (Color)
$A. [Ni(en)_3]^{2+}$ $I. \text{Green}$
$B. [Ni(H_2O)_4(en)]^{2+}$ $II. \text{Blue}$
$C. [Ni(H_2O)_6]^{2+}$ $III. \text{Pale blue}$
$D. [Ni(H_2O)_2(en)_2]^{2+}$ $IV. \text{Violet}$

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