1
JEE Advanced 2018 Paper 2 Offline
MCQ (More than One Correct Answer)
+4
-1
The correct option(s) regarding the complex

$${\left[ {Co\left( {en} \right){{\left( {N{H_3}} \right)}_3}\left( {{H_2}O} \right)} \right]^{3 + }}\,\,$$ $$\left( {en = {H_2}NC{H_2}C{H_2}N{H_2}} \right)$$ is (are)
A
It has two geometrical isomers
B
It will have three geometrical isomers if bidentate 'en' is replaced by two cyanide ligands
C
It is paramagnetic
D
It absorbs light at longer wavelength as compared to

$${\left[ {Co\left( {en} \right){{\left( {N{H_3}} \right)}_4}} \right]^{3 + }}$$
2
JEE Advanced 2018 Paper 1 Offline
MCQ (More than One Correct Answer)
+4
-1
The correct statement(s) regarding the binary transition metal carbonyl compounds is(are) (Atomic numbers : $$Fe = 26,Ni = 28$$)
A
Total number of valence shell electrons at metal center in $$Fe{\left( {CO} \right)_5}\,\,$$ or $$Ni{\left( {CO} \right)_4}$$ is $$16$$
B
These are predominantly low spin in nature
C
Metal-carbon bond strengthens when the oxidation state of the metal is lowered.
D
The carbonyl $$C-O$$ bond weakens when the oxidation state of the metal is increased
3
JEE Advanced 2017 Paper 1 Offline
MCQ (More than One Correct Answer)
+4
-2
Addition of excess aqueous ammonia to a pink colored aqueous solution of $$MC{l_2},6{H_2}O\left( X \right)$$ and $$N{H_4}Cl$$ gives an octahedral complex $$Y$$ in the presence of air. In aqueous solution, complex $$Y$$ behaves as $$1:3$$ electrolyte. The reaction of $$X$$ with excess $$HCl$$ at room temperature results in the formation of a blue colored complex $$Z.$$ The calculated spin only magnetic moment of $$X$$ and $$Z$$ is $$3.87$$ $$B.M.,$$ whereas it is zero for complex $$Y.$$ Among the following options, which statement(s) is (are) correct?
A
Addition of silver nitrate to $$Y$$ gives only two equivalents of silver chloride
B
The hybridization of the central metal ion in $$Y$$ is $${d^2}s{p^3}$$
C
$$Z$$ is a tetrahedral complex
D
When $$X$$ and $$Z$$ are in equilibrium at $${0^ \circ }C,$$ the color of the solution is pink
4
IIT-JEE 2009 Paper 1 Offline
MCQ (More than One Correct Answer)
+4
-2

The compound(s) that exhibit(s) geometrical isomerism is(are)

A
$$\mathrm{\left[ {Pt(en)C{l_2}} \right]}$$
B
$$\mathrm{\left[ {Pt{{(en)}_2}} \right]C{l_2}}$$
C
$$\mathrm{\left[ {Pt{{(en)}_2}C{l_2}} \right]C{l_2}}$$
D
$$\mathrm{\left[ {Pt{{(N{H_3})}_2}C{l_2}} \right]}$$
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