JEE Main 2022 · 25 Jun · Shift 2 · Chemistry Q70

← JEE Main 2022 · 25 Jun · Shift 2

ChemistrySingle correct+4 / -1Question 70 of 90

The number of bridged oxygen atoms present in compound B formed from the following reactions is
$\mathrm{Pb(NO_3)_2\xrightarrow{673\ K}A+PbO+O_2}$
$\mathrm{A\xrightarrow{Dimerise}B}$

Answer and worked solution

Official answer: A

A. $\mathrm{2Pb(NO_3)_2\xrightarrow{673\ K}4NO_2+2PbO+O_2}$ , so A is $\mathrm{NO_2}$ .

B. It dimerises to $\mathrm{N_2O_4}$ , $\mathrm{O_2N\text{-}NO_2}$ , joined by an N-N bond: no bridging oxygen.

(A)

Topics:Group 15

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JEE Main 2022 · 25 Jun · Shift 2, Chemistry question 70