MCQ
Alkyl halides react with dialkyl copper reagents to give
- AAlkenes
- BAlkyl copper halides
- ✓Alkanes
- DAlkenyl halides
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$(b)$ $CoCl _{3} \cdot 5 NH _{3}$
$(c)$ $CoCl _{3} \cdot 6 NH _{3}$ and
$(d)$ $CoCl \left( NO _{3}\right)_{2} \cdot 5 NH _{3}$
Number of complex(es) which will exist in cistrans is/are ....

$H - C\, \equiv CH\,\xrightarrow[{(ii)\,C{H_3}C{H_2}Br}]{{(i)\,NaN{H_2}\,/\,liq.\,N{H_3}}}\,X$
$\xrightarrow[{(ii)\,C{H_3}C{H_2}Br}]{{(i)\,NaN{H_2}\,/\,liq.\,N{H_3}}}\,Y$
$X$ and $Y$ are