MCQ
Which of the following isomerism does not found in ethers :
- AChain
- BOptical
- ✓Geometric
- DPosition
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$(I)$ coloured ions in aqueous solution
$(II)$ oxides of nitrogen are formed on reaction with concentrated $HNO_3$
$(III)$ chlorides of formula $MCl_2$ and $MCl_3$
$A$ is
