JEE Main 2022 · 29 Jun · Shift 1 · Chemistry Q86

ChemistryInteger+4 / -1Question 86 of 90

The number of terminal oxygen atoms present in the product B obtained from the following reaction is ______.

$\mathrm{FeCr_2O_4+Na_2CO_3+O_2\rightarrow A+Fe_2O_3+CO_2}$
$\mathrm{A+H^+\rightarrow B+H_2O+Na^+}$

Your answer

Answer and worked solution

Official answer: 6

A is $\mathrm{Na_2CrO_4}$ ; acid gives B $\mathrm{Na_2Cr_2O_7}$ . The dichromate ion has one bridging and six terminal oxygens.

Answer: 6

JEE Main 2022 · 29 Jun · Shift 1, Chemistry question 86