MCQ
The $d-$ block element which is a liquid at room temperature, having high specific heat, less reactivity than hydrogen and its chloride $(MX_2)$ is volatile on heating is
- A$Cu$
- ✓$Hg$
- C$Ce$
- D$Pm$
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$[X] +$ Acetic anhydride $\rightarrow $ Aspirin
$[X]$ will be :
$(I)\,[Ni(CO)_4]$ $(II)\, [Mn(CN)_6]^{4-}$ $(III)\, [Cr(NH_3)_6]^{3+}$ $(IV) \,[CoF_6]^{3 -}$
$2MnO_4^-+ 10I^-+ 16H^+ \to 2Mn^{2+} + 5I_2 + 8 H_2O$
The rate of apperance of $I_2$ is