MCQ
In making gun-berrel, the steel used is
- A$Fe - Mn$
- B$Fe - Cr$
- C$Fe - W$
- ✓$Ni - Mo$
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${C_6}{H_5} - O - C{H_2} - C{H_3}\xrightarrow{{Excess\,HI/\Delta }}\left[ X \right] + \left[ Y \right]$
$[X]$ and $[Y]$ will respectively be

