MCQ
Colour of Fe2+ ions is:
- ABlue.
- BLight green.
- CVery dark green.
- DYellow.
Explanation:
Colour of Fe2+ is light green.
Due to this many salts having Fe2+ ion are also green in colour.
For ex: FeSO4
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Method $1\,:\,$ $RBr\xrightarrow[diethyl\,\,ether]{Mg}RMgBr\xrightarrow[2.\,{{H}_{3}}{{O}^{+}}]{1.\,C{{O}_{2}}}RC{{O}_{2}}H$
Method $2\,:\,$ $RBr\xrightarrow{NaCN}RCN\xrightarrow[heat]{{{H}_{2}}O,HCl}RC{{O}_{2}}H$
Which one of the following statements correctly describes this conversion ?
