Select the correct option.
- A$[Ar] \, 4s^2 \, 3d^5$ configuration belongs to the $d$-block.
- BThe magic numbers for the $III \ B$ group are $18, 18, 32$.
- CThere are a total of $10$ elements in the first transition series.
- DAll are correct.
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Similar Questions
Match the following properties with the corresponding metals:
Property Metal $a$. Element with highest second ionization enthalpy $(\Delta_{i} H_2)$ $i$. $Co$ $b$. Element with highest third ionization enthalpy $(\Delta_{i} H_3)$ $ii$. $Cr$ $c$. $M$ in $[M(CO)_6]$ $iii$. $Cu$ $d$. Element with highest heat of atomization $(\Delta_{a} H)$ $iv$. $Zn$ $v$. $Ni$
| Property | Metal |
|---|---|
| $a$. Element with highest second ionization enthalpy $(\Delta_{i} H_2)$ | $i$. $Co$ |
| $b$. Element with highest third ionization enthalpy $(\Delta_{i} H_3)$ | $ii$. $Cr$ |
| $c$. $M$ in $[M(CO)_6]$ | $iii$. $Cu$ |
| $d$. Element with highest heat of atomization $(\Delta_{a} H)$ | $iv$. $Zn$ |
| $v$. $Ni$ |
Identify the $incorrect$ order of the given parameter.
Medium
View SolutionStatement $(I)$ $Co^{2+}$ has a higher magnetic moment than $Cr^{3+}$.
Statement $(II)$ Ionisation enthalpies of $Ce$,$Pr$ and $Nd$ are higher than $Th$,$Pa$ and $U$.
Which of the following is correct?
Statement $(II)$ Ionisation enthalpies of $Ce$,$Pr$ and $Nd$ are higher than $Th$,$Pa$ and $U$.
Which of the following is correct?
The difference in the 'spin-only' magnetic moment values of $KMnO_4$ and the manganese product formed during titration of $KMnO_4$ against oxalic acid in acidic medium is .................... $BM$. (nearest integer)
Match the following:
List-$I$ List-$II$ $A$. Oxidation state of $V$ in $VOCl_2$ $I$. $0$ $B$. Number of unpaired electrons in $MnO_4^{2-}$ ion $II$. $1$ $C$. Number of unpaired electrons in $[NiCl_4]^{2-}$ ion $III$. $5$ $D$. This oxidation state is exhibited by all lanthanide ions $IV$. $3$ $V$. $4$ $VI$. $2$
The correct answer is:
| List-$I$ | List-$II$ |
|---|---|
| $A$. Oxidation state of $V$ in $VOCl_2$ | $I$. $0$ |
| $B$. Number of unpaired electrons in $MnO_4^{2-}$ ion | $II$. $1$ |
| $C$. Number of unpaired electrons in $[NiCl_4]^{2-}$ ion | $III$. $5$ |
| $D$. This oxidation state is exhibited by all lanthanide ions | $IV$. $3$ |
| $V$. $4$ | |
| $VI$. $2$ |
The correct answer is:
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