(A) : When $\mathrm{Na}_{2} \mathrm{~S}$ is mixed with freshly prepared sodium nitroprusside, a deep violet colour indicates the presence of sulphur. $\mathrm{Na}_{2} \mathrm{~S}+\mathrm{Na}_{2}\left[\mathrm{Fe}(\mathrm{NO})(\mathrm{CN})_{5}\right] \longrightarrow \mathrm{Na}_{4}\left[\left(\mathrm{Fe}(\mathrm{CN})_{5}\right) \mathrm{NOS}\right]$ $\text { Sodium nitroprusside } \quad \text { Sodium thionitroprusside }$
UP CPMT-2006
COORDINATION COMPOUNDS
274422
Which of the following metal ions is not coloured?
1 $\mathrm{Ti}^{3+}$
2 $\mathrm{Fe}^{3+}$
3 $\mathrm{V}^{2+}$
4 $\mathrm{Zn}^{2+}$
Explanation:
(D) : $\mathrm{Zn}^{2+}:\left(3 \mathrm{~d}^{10}\right)$ has no unpaired electron. So it is colourless. $\mathrm{Zn}^{2+}$ is a divalent metal cation, a zinc cation and a monoatomic dication. It has a role as a human metabolite and cofactor.
UPTU/UPSEE-2006
COORDINATION COMPOUNDS
274423
Copper sulphate solution, When added to an excess of amonium hydroxide, forms a complex compound due to:
(B) : $\mathrm{Na}_{2}\left[\mathrm{Cd} . \mathrm{Cl}_{4}\right]$ has no unpaired electron due to presence of $\mathrm{d}^{10}$ electrons. $\mathrm{Cd}^{2+}$ is a colourless compound.
(A) : When $\mathrm{Na}_{2} \mathrm{~S}$ is mixed with freshly prepared sodium nitroprusside, a deep violet colour indicates the presence of sulphur. $\mathrm{Na}_{2} \mathrm{~S}+\mathrm{Na}_{2}\left[\mathrm{Fe}(\mathrm{NO})(\mathrm{CN})_{5}\right] \longrightarrow \mathrm{Na}_{4}\left[\left(\mathrm{Fe}(\mathrm{CN})_{5}\right) \mathrm{NOS}\right]$ $\text { Sodium nitroprusside } \quad \text { Sodium thionitroprusside }$
UP CPMT-2006
COORDINATION COMPOUNDS
274422
Which of the following metal ions is not coloured?
1 $\mathrm{Ti}^{3+}$
2 $\mathrm{Fe}^{3+}$
3 $\mathrm{V}^{2+}$
4 $\mathrm{Zn}^{2+}$
Explanation:
(D) : $\mathrm{Zn}^{2+}:\left(3 \mathrm{~d}^{10}\right)$ has no unpaired electron. So it is colourless. $\mathrm{Zn}^{2+}$ is a divalent metal cation, a zinc cation and a monoatomic dication. It has a role as a human metabolite and cofactor.
UPTU/UPSEE-2006
COORDINATION COMPOUNDS
274423
Copper sulphate solution, When added to an excess of amonium hydroxide, forms a complex compound due to:
(B) : $\mathrm{Na}_{2}\left[\mathrm{Cd} . \mathrm{Cl}_{4}\right]$ has no unpaired electron due to presence of $\mathrm{d}^{10}$ electrons. $\mathrm{Cd}^{2+}$ is a colourless compound.
(A) : When $\mathrm{Na}_{2} \mathrm{~S}$ is mixed with freshly prepared sodium nitroprusside, a deep violet colour indicates the presence of sulphur. $\mathrm{Na}_{2} \mathrm{~S}+\mathrm{Na}_{2}\left[\mathrm{Fe}(\mathrm{NO})(\mathrm{CN})_{5}\right] \longrightarrow \mathrm{Na}_{4}\left[\left(\mathrm{Fe}(\mathrm{CN})_{5}\right) \mathrm{NOS}\right]$ $\text { Sodium nitroprusside } \quad \text { Sodium thionitroprusside }$
UP CPMT-2006
COORDINATION COMPOUNDS
274422
Which of the following metal ions is not coloured?
1 $\mathrm{Ti}^{3+}$
2 $\mathrm{Fe}^{3+}$
3 $\mathrm{V}^{2+}$
4 $\mathrm{Zn}^{2+}$
Explanation:
(D) : $\mathrm{Zn}^{2+}:\left(3 \mathrm{~d}^{10}\right)$ has no unpaired electron. So it is colourless. $\mathrm{Zn}^{2+}$ is a divalent metal cation, a zinc cation and a monoatomic dication. It has a role as a human metabolite and cofactor.
UPTU/UPSEE-2006
COORDINATION COMPOUNDS
274423
Copper sulphate solution, When added to an excess of amonium hydroxide, forms a complex compound due to:
(B) : $\mathrm{Na}_{2}\left[\mathrm{Cd} . \mathrm{Cl}_{4}\right]$ has no unpaired electron due to presence of $\mathrm{d}^{10}$ electrons. $\mathrm{Cd}^{2+}$ is a colourless compound.
(A) : When $\mathrm{Na}_{2} \mathrm{~S}$ is mixed with freshly prepared sodium nitroprusside, a deep violet colour indicates the presence of sulphur. $\mathrm{Na}_{2} \mathrm{~S}+\mathrm{Na}_{2}\left[\mathrm{Fe}(\mathrm{NO})(\mathrm{CN})_{5}\right] \longrightarrow \mathrm{Na}_{4}\left[\left(\mathrm{Fe}(\mathrm{CN})_{5}\right) \mathrm{NOS}\right]$ $\text { Sodium nitroprusside } \quad \text { Sodium thionitroprusside }$
UP CPMT-2006
COORDINATION COMPOUNDS
274422
Which of the following metal ions is not coloured?
1 $\mathrm{Ti}^{3+}$
2 $\mathrm{Fe}^{3+}$
3 $\mathrm{V}^{2+}$
4 $\mathrm{Zn}^{2+}$
Explanation:
(D) : $\mathrm{Zn}^{2+}:\left(3 \mathrm{~d}^{10}\right)$ has no unpaired electron. So it is colourless. $\mathrm{Zn}^{2+}$ is a divalent metal cation, a zinc cation and a monoatomic dication. It has a role as a human metabolite and cofactor.
UPTU/UPSEE-2006
COORDINATION COMPOUNDS
274423
Copper sulphate solution, When added to an excess of amonium hydroxide, forms a complex compound due to:
(B) : $\mathrm{Na}_{2}\left[\mathrm{Cd} . \mathrm{Cl}_{4}\right]$ has no unpaired electron due to presence of $\mathrm{d}^{10}$ electrons. $\mathrm{Cd}^{2+}$ is a colourless compound.
(A) : When $\mathrm{Na}_{2} \mathrm{~S}$ is mixed with freshly prepared sodium nitroprusside, a deep violet colour indicates the presence of sulphur. $\mathrm{Na}_{2} \mathrm{~S}+\mathrm{Na}_{2}\left[\mathrm{Fe}(\mathrm{NO})(\mathrm{CN})_{5}\right] \longrightarrow \mathrm{Na}_{4}\left[\left(\mathrm{Fe}(\mathrm{CN})_{5}\right) \mathrm{NOS}\right]$ $\text { Sodium nitroprusside } \quad \text { Sodium thionitroprusside }$
UP CPMT-2006
COORDINATION COMPOUNDS
274422
Which of the following metal ions is not coloured?
1 $\mathrm{Ti}^{3+}$
2 $\mathrm{Fe}^{3+}$
3 $\mathrm{V}^{2+}$
4 $\mathrm{Zn}^{2+}$
Explanation:
(D) : $\mathrm{Zn}^{2+}:\left(3 \mathrm{~d}^{10}\right)$ has no unpaired electron. So it is colourless. $\mathrm{Zn}^{2+}$ is a divalent metal cation, a zinc cation and a monoatomic dication. It has a role as a human metabolite and cofactor.
UPTU/UPSEE-2006
COORDINATION COMPOUNDS
274423
Copper sulphate solution, When added to an excess of amonium hydroxide, forms a complex compound due to:
(B) : $\mathrm{Na}_{2}\left[\mathrm{Cd} . \mathrm{Cl}_{4}\right]$ has no unpaired electron due to presence of $\mathrm{d}^{10}$ electrons. $\mathrm{Cd}^{2+}$ is a colourless compound.