MCQ
Oxidation number of cobalt in $K[Co{(CO)_4}]$ is
- A$+1$
- B$+3$
- ✓$-1$
- D$-3$
✓
Answer
Correct option: C.
$-1$
c
(c)$K[\mathop C\limits^ * o{(CO)_4}]$
(c)$K[\mathop C\limits^ * o{(CO)_4}]$
$1 + x + 0 = 0;\,\,x = - 1$.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The pair of lanthanides in which both elements have high third-ionization energy is:
Given below are the half-cell reactions :
→$Mn^{2+} +2e- \rightarrow Mn;\, E^o = -1.18\,V$
$2(Mn^{3+} +e^- \rightarrow Mn^{2+} )\,;\,E^o=+1.51\,V$
The $E^o$ for $3Mn^{2+} \rightarrow Mn+ 2Mn^{3+}$ will be :
The increasing order of $pK _{ b }$ values of the following compounds is
→Rectified spirit obtained by fermentation contains $4.5$ $\%$ of water. So in order to remove it, rectified spirit is mixed with suitable quantity of benzene and heated. Benzene helps because
→The formation of starch in plants results from
${E^o}$ values of $M{g^{2 + }}/Mg$ is $ - 2.37\,V$, of $Z{n^{2 + }}/Zn$ is $ - 0.76\,V$ and $F{e^{2 + }}/Fe$ is $ - 0.44\,V$. Which of the following statements is correct
→Chloropicrin is obtained by the reaction of
Two liquids $A$ and $B$ have $P_A^o$ and $P_B^o$ in the ratio of $1 : 3$ and the ratio of number of moles of $A$ and $B$ in the liquid phase are $1 : 3$ than mole fraction of $A$ in vapour phase in equilibrium with the solution is equal to
→Solubility of $AgCl$ in conc. $HCl$ is ...... than in water.
→$C{H_3} - CC{l_3}\xrightarrow[{(2)\,{H^ \oplus }}]{{(1)\,KOH\left( {aq.} \right)}}P\xrightarrow[{(2)\,\Delta }]{{(1)\,Ca{{\left( {OH} \right)}_2}}}Q;\,Q$ is
→