07. Spectra and Colour of Co-ordination Compounds
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NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
COORDINATION COMPOUNDS

274380 A brown ring is formed in the ring test for $\mathrm{NO}_{3}{ }^{-}$ion. It is due to the formation of:

1 $\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{NO}\right]^{2+}$
2 $\mathrm{FeSO}_{4} \mathrm{NO}_{2}$
3 $\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4}(\mathrm{NO})_{2}\right]^{2+}$\
4 $\mathrm{FeSO}_{4} \mathrm{HNO}_{3}$
HP CET-2018
COORDINATION COMPOUNDS

274388 Which of the following compounds is not coloured yellow?

1 $\mathrm{Zn}_{2}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]$
2 $\mathrm{K}_{3}\left[\mathrm{Co}\left(\mathrm{NO}_{2}\right)_{6}\right]$
3 $\left(\mathrm{NH}_{4}\right)_{3}\left[\mathrm{As}\left(\mathrm{Mo}_{3} \mathrm{O}_{10}\right)_{4}\right]$
4 $\mathrm{BaCrO}_{4}$
JEE Main 2015
COORDINATION COMPOUNDS

274392 Assertion (A) $\mathrm{Cu}^{2+}$ and $\mathrm{Cd}^{2+}$ are separated by first adding KCN solution and then passing $\mathrm{H}_{2} \mathrm{~S}$ gas.
Reason (R) $\mathrm{KCN}$ reduces $\mathrm{Cu}^{2+}$ to $\mathrm{Cu}^{+}$and forms a complex with it.
The correct answer is

1 Both (A) and (R) are true and (R) is the correct explanation of (A)
2 Both (A) and (R) are true but (R) is not the correct explanation of (A)
3 (A) is true but (R) is not true
4 (A) is not true but (R) is true
VITEEE- 2011
COORDINATION COMPOUNDS

274395 Which of the following is a correct statement?

1 Aqueous solutions of $\mathrm{Cu}^{+}$and $\mathrm{Zn}^{2+}$ are colourless
2 Aqueous solutions of $\mathrm{Cu}^{2+}$ and $\mathrm{Zn}^{2+}$ are colourless
3 Aqueous solution of $\mathrm{Fe}^{3+}$ is green in colour
4 Aqueous solution of $\mathrm{MnO}_{4}^{-}$is colourless
AP EAMCET- (Engg.) - 2010
NEET DIGITAL LIBRARY
COORDINATION COMPOUNDS

274380 A brown ring is formed in the ring test for $\mathrm{NO}_{3}{ }^{-}$ion. It is due to the formation of:

1 $\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{NO}\right]^{2+}$
2 $\mathrm{FeSO}_{4} \mathrm{NO}_{2}$
3 $\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4}(\mathrm{NO})_{2}\right]^{2+}$\
4 $\mathrm{FeSO}_{4} \mathrm{HNO}_{3}$
HP CET-2018
COORDINATION COMPOUNDS

274388 Which of the following compounds is not coloured yellow?

1 $\mathrm{Zn}_{2}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]$
2 $\mathrm{K}_{3}\left[\mathrm{Co}\left(\mathrm{NO}_{2}\right)_{6}\right]$
3 $\left(\mathrm{NH}_{4}\right)_{3}\left[\mathrm{As}\left(\mathrm{Mo}_{3} \mathrm{O}_{10}\right)_{4}\right]$
4 $\mathrm{BaCrO}_{4}$
JEE Main 2015
COORDINATION COMPOUNDS

274392 Assertion (A) $\mathrm{Cu}^{2+}$ and $\mathrm{Cd}^{2+}$ are separated by first adding KCN solution and then passing $\mathrm{H}_{2} \mathrm{~S}$ gas.
Reason (R) $\mathrm{KCN}$ reduces $\mathrm{Cu}^{2+}$ to $\mathrm{Cu}^{+}$and forms a complex with it.
The correct answer is

1 Both (A) and (R) are true and (R) is the correct explanation of (A)
2 Both (A) and (R) are true but (R) is not the correct explanation of (A)
3 (A) is true but (R) is not true
4 (A) is not true but (R) is true
VITEEE- 2011
COORDINATION COMPOUNDS

274395 Which of the following is a correct statement?

1 Aqueous solutions of $\mathrm{Cu}^{+}$and $\mathrm{Zn}^{2+}$ are colourless
2 Aqueous solutions of $\mathrm{Cu}^{2+}$ and $\mathrm{Zn}^{2+}$ are colourless
3 Aqueous solution of $\mathrm{Fe}^{3+}$ is green in colour
4 Aqueous solution of $\mathrm{MnO}_{4}^{-}$is colourless
AP EAMCET- (Engg.) - 2010
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COORDINATION COMPOUNDS

274380 A brown ring is formed in the ring test for $\mathrm{NO}_{3}{ }^{-}$ion. It is due to the formation of:

1 $\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{NO}\right]^{2+}$
2 $\mathrm{FeSO}_{4} \mathrm{NO}_{2}$
3 $\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4}(\mathrm{NO})_{2}\right]^{2+}$\
4 $\mathrm{FeSO}_{4} \mathrm{HNO}_{3}$
HP CET-2018
COORDINATION COMPOUNDS

274388 Which of the following compounds is not coloured yellow?

1 $\mathrm{Zn}_{2}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]$
2 $\mathrm{K}_{3}\left[\mathrm{Co}\left(\mathrm{NO}_{2}\right)_{6}\right]$
3 $\left(\mathrm{NH}_{4}\right)_{3}\left[\mathrm{As}\left(\mathrm{Mo}_{3} \mathrm{O}_{10}\right)_{4}\right]$
4 $\mathrm{BaCrO}_{4}$
JEE Main 2015
COORDINATION COMPOUNDS

274392 Assertion (A) $\mathrm{Cu}^{2+}$ and $\mathrm{Cd}^{2+}$ are separated by first adding KCN solution and then passing $\mathrm{H}_{2} \mathrm{~S}$ gas.
Reason (R) $\mathrm{KCN}$ reduces $\mathrm{Cu}^{2+}$ to $\mathrm{Cu}^{+}$and forms a complex with it.
The correct answer is

1 Both (A) and (R) are true and (R) is the correct explanation of (A)
2 Both (A) and (R) are true but (R) is not the correct explanation of (A)
3 (A) is true but (R) is not true
4 (A) is not true but (R) is true
VITEEE- 2011
COORDINATION COMPOUNDS

274395 Which of the following is a correct statement?

1 Aqueous solutions of $\mathrm{Cu}^{+}$and $\mathrm{Zn}^{2+}$ are colourless
2 Aqueous solutions of $\mathrm{Cu}^{2+}$ and $\mathrm{Zn}^{2+}$ are colourless
3 Aqueous solution of $\mathrm{Fe}^{3+}$ is green in colour
4 Aqueous solution of $\mathrm{MnO}_{4}^{-}$is colourless
AP EAMCET- (Engg.) - 2010
For More Updates join with Us
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
COORDINATION COMPOUNDS

274380 A brown ring is formed in the ring test for $\mathrm{NO}_{3}{ }^{-}$ion. It is due to the formation of:

1 $\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{NO}\right]^{2+}$
2 $\mathrm{FeSO}_{4} \mathrm{NO}_{2}$
3 $\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4}(\mathrm{NO})_{2}\right]^{2+}$\
4 $\mathrm{FeSO}_{4} \mathrm{HNO}_{3}$
HP CET-2018
COORDINATION COMPOUNDS

274388 Which of the following compounds is not coloured yellow?

1 $\mathrm{Zn}_{2}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]$
2 $\mathrm{K}_{3}\left[\mathrm{Co}\left(\mathrm{NO}_{2}\right)_{6}\right]$
3 $\left(\mathrm{NH}_{4}\right)_{3}\left[\mathrm{As}\left(\mathrm{Mo}_{3} \mathrm{O}_{10}\right)_{4}\right]$
4 $\mathrm{BaCrO}_{4}$
JEE Main 2015
COORDINATION COMPOUNDS

274392 Assertion (A) $\mathrm{Cu}^{2+}$ and $\mathrm{Cd}^{2+}$ are separated by first adding KCN solution and then passing $\mathrm{H}_{2} \mathrm{~S}$ gas.
Reason (R) $\mathrm{KCN}$ reduces $\mathrm{Cu}^{2+}$ to $\mathrm{Cu}^{+}$and forms a complex with it.
The correct answer is

1 Both (A) and (R) are true and (R) is the correct explanation of (A)
2 Both (A) and (R) are true but (R) is not the correct explanation of (A)
3 (A) is true but (R) is not true
4 (A) is not true but (R) is true
VITEEE- 2011
COORDINATION COMPOUNDS

274395 Which of the following is a correct statement?

1 Aqueous solutions of $\mathrm{Cu}^{+}$and $\mathrm{Zn}^{2+}$ are colourless
2 Aqueous solutions of $\mathrm{Cu}^{2+}$ and $\mathrm{Zn}^{2+}$ are colourless
3 Aqueous solution of $\mathrm{Fe}^{3+}$ is green in colour
4 Aqueous solution of $\mathrm{MnO}_{4}^{-}$is colourless
AP EAMCET- (Engg.) - 2010
NEET DIGITAL LIBRARY