Which of the following are correctly balanced steps of the standard scheme for chlorine-catalysed ozone loss and activation of reservoirs?

A $Cl + O X_{3} ClO + O X_{2}$
B $ClO + O Cl + O X_{2}$
C $ClONO X_{2} + H X_{2} O HOCl + HNO X_{3}$
D $ClO + O Cl + O X_{3}$

Answer: A, B, C

Each of the first three is balanced and belongs to the scheme. The last would need three oxygen atoms on the right but only two are on the left (ClO + O has two O), so it is unbalanced and chemically wrong.

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Which of the following are correctly balanced steps of the standard scheme for chlorine-catalysed ozone loss and activation of reservoirs?

Answer: A, B, C

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