The oxidation number of \( \mathrm{Cl} \) in \( \mathrm{HCl} \) is (1) \( -1 \) (2) \( +1 \) (3)...

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The oxidation number of \( \mathrm{Cl} \) in \( \mathrm{HCl} \) is
(1) \( -1 \)
(2) \( +1 \)
(3) \( 0 \)
(4) Both A and B
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