Magnetic Properties

Q. Which of the following has magnetic moment of 1.73 B.M. (approx.)?

1. $[CoC{l}_6{]}^{4-}$
2. $\left[Fe\right(CN{)}_6{]}^{3-}$
3. $\left[Cu\right(N{H}_3{)}_4{]}^{2+}$
4. $\left[Ni\right(CO{)}_4]$

Q.

Which of the following ions have highest magnetic moment?

1. ${\mathrm{Mn}}^{2+}$

2. ${\mathrm{Fe}}^{2+}$

3. ${\mathrm{Ti}}^{2+}$

4. ${\mathrm{Cr}}^{2+}$

Q.

How many electrons in a copper atom $\left({}^{29}\mathrm{Cu}\right)$ have$(\mathrm{n}+\mathrm{l})=4$

Q. Which of the following arrangements does not represent the correct order of the property stated against it?

1. Sc <Ti <Cr <Mn : number of oxidation states
2. V${}^{2+}$ <Cr${}^{2+}$ <Mn${}^{2+}$ <Fe${}^{2+}$: paramagnetic behavior
3. Ni${}^{2+}$ <Co${}^{2+}$ < Fe${}^{2+}$ < Mn${}^{2+}$: ionic size
4. Co${}^{3+}$ <Fe${}^{3+}$ <Cr${}^{3+}$ < Sc${}^{3+}$: stability in aqueous solution.

Q. Among the following, the compound that is both paramagnetic and coloured is

1. $K_{2}C{r}_2{O}_7$
2. $\left(N{H}_4{)}_2\right(TiC{l}_6)$
3. $VOS{O}_4$
4. $K_3\left[Cu\right(C{N}_4\left)\right]$

Q. Which of the following is paramagnetic as well as coloured?

1. $S{c}^{3+}$
2. $T{i}^{4+}$
3. $C{u}^{2+}$
4. $C{u}^{+}$

Q. The magnetic moment of $C{r}^{3+}$ is

Q. Which one of the following transition metal ion shows magnetic moment 5.92 BM

1. $M{n}^{2+}$
2. $T{i}^{3+}$
3. $G^{3+}$
4. $C{u}^{2+}$

Q. Match the column:
$\begin{array}{cccc}& & & \\ & Column-I& & Column-II\\ \left(a\right)& Ni& \left(p\right)& Elementshavingsamenumberofunpairedelectron\\ & & & intheirdipositiveincolumn-I\\ \left(b\right)& K& \left(q\right)& Atleast13electronsarehaving\\ & & & magneticquantumnumber{}^{\prime }zer{o}^{\prime }.\\ \left(c\right)& Mn& \left(r\right)& Atomisparamagnetic\\ \left(d\right)& Pd& \left(s\right)& Elementisnottransitionelemeent\\ & & \left(t\right)& Elementhavingpseudoinertgas\\ & & & configurationinitsdipositivecation\end{array}$

1. (a) p, q, s; (b) r, s; (c) q, r; (d) p, q
2. (a) p, q; (b) r, s; (c) q, r; (d) p, q, s
3. (a) p, q, s; (b) q, r; (c) q, r, s; (d) p, q
4. (a) p, q, s; (b) r, s; (c) p, q; (d) q, r

Q.

Which of the following do not have unpaired $e^{-}$?

1. Paramagnetic

2. Diamagnetic

3. Ferromagnetic

4. none of these

Q.

Ferrimagnetism is in

1. $\uparrow \uparrow \uparrow \uparrow \uparrow$

2. $\uparrow \downarrow \uparrow \downarrow$

3. $\uparrow \uparrow \uparrow \downarrow \downarrow$

4. $\uparrow \uparrow \downarrow \downarrow \uparrow \uparrow \uparrow \downarrow \downarrow \downarrow$

Q. Which of the following is paramagnetic in nature?

1. Lu${}^{3+}$
2. Ce${}^{4+}$
3. Eu${}^{2+}$
4. Yb${}^{2+}$

Q.

Given complexes are low spin complexes,

$$\begin{gathered} \left[\mathrm{V}{\left(\mathrm{CN}\right)}_6{]}^{4-} \\ \right[\mathrm{Cr}{\left({\mathrm{NH}}_3\right)}_6{]}^{2+} \\ \left[\mathrm{Ru}{\left({\mathrm{NH}}_3\right)}_6{]}^{3+} \\ \right[\mathrm{Fe}{\left(\mathrm{CN}\right)}_6{]}^{4-} \end{gathered}$$

Then the order of magnetic moments for ${\mathrm{V}}^{2+},{\mathrm{Fe}}^{2+},{\mathrm{Cr}}^{3+},{\mathrm{Ru}}^{3+}$is:

1. ${\mathrm{V}}^{2+}>{\mathrm{Cr}}^{3+}>{\mathrm{Fe}}^{2+}>{\mathrm{Ru}}^{3+}$

2. ${\mathrm{Fe}}^{2+}>{\mathrm{V}}^{2+}>{\mathrm{Cr}}^{3+}>{\mathrm{Ru}}^{3+}$

3. ${\mathrm{V}}^{2+}>{\mathrm{Cr}}^{3+}>{\mathrm{Ru}}^{3+}>{\mathrm{Fe}}^{2+}$

4. ${\mathrm{Fe}}^{2+}>{\mathrm{Cr}}^{3+}>{\mathrm{V}}^{2+}>{\mathrm{Ru}}^{3+}$

Q. Among the following, the ion with highest magnetic moment is .

1. $T{i}^{2+}$
2. $C{r}^{+}$
3. $C{o}^{2+}$
4. $N{i}^{2+}$

Q. Which of the following metallic ions have the same magnetic moment?

1. $C{r}^{3+}$
2. $M{n}^{2+}$
3. $C{r}^{2+}$
4. $C{o}^{2+}$
   

Q. Magnetic moment 2.84 B.M. is given by (At. nos. Ni = 28, Ti = 22, Cr = 24, Co = 27)

1. $C{r}^{2+}$
2. $C{o}^{2+}$
3. $N{i}^{2+}$
4. $T{i}^{3+}$

Q. Magnetic moment 2.83 BM is given by which of the following ions?
(At. nos. Ti = 22, Cr = 24, Mn = 25, Ni = 28)

1. $T{i}^{3+}$
2. $N{i}^{2+}$
3. $C{r}^{3+}$
4. $M{n}^{2+}$

Q. The magnetic moment of ${}_{25}Mn$ in ionic state is $\sqrt{15}BM$, then $Mn$ is in:

1. +2 state
2. +3 state
3. +4 state
4. +5 state

Q. A compound of vanadium has a magnetic moment of 1.73 BM. Vanadium chloride has the formula:

1. $VC{l}_2$
2. $VC{l}_3$
3. $VC{l}_4$
4. $VC{l}_5$

Q. A compound of vanadium has a magnetic moment of 1.73 BM. Vanadium chloride has the formula:

1. $VC{l}_2$
2. $VC{l}_3$
3. $VC{l}_4$
4. $VC{l}_5$

Q. For the four successive transition elements $(Cr,Mn,Fe\text{and}Co)$ , the stability of $+2$ oxidation state in gaseous state will be there in which of the following order ?
(Atomic no. $Cr=24,Mn=25,Fe=26,Co=27$)

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1. $Fe>Mn>Co>Cr$
2. $Co>Mn>Fe>Cr$
3. $Mn>Fe>Cr>Co$
4. $Cr>Mn>Co>Fe$

Q. The calculated magnetic moment of $F{e}^{n+}$ ion is 4.90 BM. The sum of the number of unpaired electrons present in $3d$ subshell of $F{e}^{n+}$ ion and the value of n is

Q. Which of the following is paramagnetic as well as coloured?

1. $S{c}^{3+}$
2. $T{i}^{4+}$
3. $C{u}^{2+}$
4. $C{u}^{+}$

Q. Which one of the following transition metal ion shows magnetic moment 5.92 BM

1. $M{n}^{2+}$
2. $T{i}^{3+}$
3. $G^{3+}$
4. $C{u}^{2+}$

Q.

Which of the following substances are repelled by magnetic field?

1. Paramagnetic

2. Diamagnetic

3. Ferromagnetic

4. None of these

Q. Consider the four sulphates: $FeS{O}_4,MnS{O}_4,CoS{O}_4$ and $ZnS{O}_4$. Four separate capsules of these materials have been made containing $0.1$ mole of the substance and are suspended by a thread. A strong magnet is brought close to each capsule. The order of sulphates according to the strength of the response towards the magnet is:

1. $MnS{O}_4>FeS{O}_4>CoS{O}_4>ZnS{O}_4$
2. $FeS{O}_4>MnS{O}_4>CoS{O}_4>ZnS{O}_4$
3. $CoS{O}_4>ZnS{O}_4>FeS{O}_4>MnS{O}_4$
4. $CoS{O}_4>FeS{O}_4>MnS{O}_4>ZnS{O}_4$

Q. Sort the following in decreasing order of their magnetic moments.

1. $C{o}^{2+}$
2. $F{e}^{2+}$
3. $M{n}^{2+}$
4. $T{i}^{3+}$

Q. In which states, the compound of vanadium is diamagnetic?

1. V(II)
2. V(III)
3. V(IV)
4. V(V)

Q. Which ion has maximum magnetic moment?

1. $V^{+3}$
   
2. $M{n}^{+3}$
3. $F{e}^{+3}$
4. $C{u}^{+2}$

Q. Among the following, the compound that is both paramagnetic and coloured is

1. $K_{2}C{r}_2{O}_7$
2. $\left(N{H}_4{)}_2\right(TiC{l}_6)$
3. $VOS{O}_4$
4. $K_3\left[Cu\right(C{N}_4\left)\right]$