MCQ
Which of the following metal does not react with water?
- ✓Beryllium
- BCopper
- CIron
- DPotassium
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(Given $R=2.0 \mathrm{cal} \mathrm{K}^{-1} \mathrm{~mol}^{-1}$ )
$A.$Reaction is spontaneous at $(a)$ and $(b)$
$B.$Reaction is at equilibrium at point $(b)$ and nonspontaneous at point $(c)$
$C.$Reaction is spontaneous at $(a)$ and nonspontaneous at $(c)$
$D.$Reaction is non-spontaneous at $(a)$ and $(b)$
$(1)$ $(CH_3)_3 {\bar{\ddot{C}}}$
$(2)$ ${(C{H_3})_2}{\bar {\ddot {CH}}}$
$(3) $ $C{H_3}{\bar{\ddot{C{H_2}}}}$
$(4)$ ${C_6}{H_5}{\bar{\ddot{C{H_2}}}}$ is