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1
JEE Main 2019 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Two complexes [Cr(H2O)6]Cl3 (A) and [Cr(NH3)6]Cl3 (B) are violet and yellow coloured, respectively. The incorrect statement regarding them is :
A
$$\Delta $$0 values of (A) and (B) are calculated from the energies of violet and yellow light, respectively
B
both are paramagnetic with three unpaired electrons
C
both absorb energies corresponding to their complementry colors.
D
$$\Delta $$0 value for (A) is less than that of (B).
2
JEE Main 2018 (Online) 16th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
In Wilkinson's catalyst, the hybridization of central metal ion and its shape are respectively :
A
sp3d, trigonal bipyramidal
B
sp3, tetrahedral
C
dsp2, square planar
D
d2sp3, octahedral
3
JEE Main 2018 (Online) 16th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following complexes will shows geometrical isomerism ?
A
aquachlorobis (ethylenediamine) cobalt (II) chloride
B
pentaaquachlorohromium (III) chloride
C
potassium amminetrichloropltinate (II)
D
potassium tris(oxalato) chromate (III)
4
JEE Main 2018 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
The oxidation states of Cr in [Cr(H2O)6]Cl3, [Cr(C6H6)2] and K2[Cr(CN)2(O)2(O2)(NH3)] respectively are :
A
+3, 0 and +4
B
+3, +4 and +6
C
+3, +2 and +4
D
+3, 0 and +6
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