MCQ
In thiosulphuric acid
- Aeach sulphar atom is in identical oxidation state
- ✓there is a $S = S$ linkage present
- Cone $S$ atom is in $+2$ and other sulpher atom is in $+4$ oxidation state
- Dthere is only one replaceabe hydrogen atom

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$1\,L$ Solution $( X )+ AgNO _3$ solution (excess) $\rightarrow Y$
$1\,L$ Solution $( X )+ BaCl _2$ solution (excess) $\rightarrow Z$
The number of moles of $Y$ and $Z$ respectively are
Assertion $A$ : Aryl halides cannot be prepared by replacement of hydroxyl group of phenol by halogen atom.
Reason $R$ : Phenols react with halogen acids violently. In the light of the above statements, choose the most appropriate from the options given below: