1
JEE Main 2020 (Online) 3rd September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The d-electron configuration of [Ru(en)3 ]Cl2
and [Fe(H2O)6]Cl2 , respectively are :
A
$$t_{2g}^4e_g^2$$ and $$t_{2g}^6e_g^0$$
B
$$t_{2g}^6e_g^0$$ and $$t_{2g}^6e_g^0$$
C
$$t_{2g}^6e_g^0$$ and $$t_{2g}^4e_g^2$$
D
$$t_{2g}^4e_g^2$$ and $$t_{2g}^4e_g^2$$
2
JEE Main 2020 (Online) 3rd September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Complex A has a composition of H12O6Cl3Cr. If the complex on treatment with conc.H2SO4 loses 13.5% of its original mass, the correct molecular formula of A is :
[Given: atomic mass of Cr = 52 amu and Cl = 35 amu]
A
[Cr(H2O)5Cl]Cl2.H2O
B
[Cr(H2O)4Cl2]Cl.2H2O
C
[Cr(H2O)3Cl3].3H2O
D
[Cr(H2O)6]Cl3
3
JEE Main 2020 (Online) 3rd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The complex that can show optical activity is :
A
cis-[Fe(NH3)2(CN)4]
B
trans-[Cr(Cl2)(ox)2]3–
C
trans-[Fe(NH3)2(CN)4]
D
cis-[CrCl2(ox)2]3– (ox = oxalate)
4
JEE Main 2020 (Online) 3rd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The electronic spectrum of [Ti(H2O)6]3+ shows a single broad peak with a maximum at 20,300 cm-1 . The crystal field stabilization energy (CFSE) of the complex ion, in kJ mol-1, is :
A
83.7
B
242.5
C
145.5
D
97
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