1
JEE Main 2016 (Online) 10th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The transition metal ions responsible for color in ruby and emerald are, respectively :
A
Cr3+   and   Co3+
B
Co3+    and    Cr3+
C
Co3+    and    Co3+
D
Cr3+    and    Cr3+
2
JEE Main 2016 (Online) 10th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following is an example of homoleptic complex?
A
[Co(NH3)6]Cl3
B
[Pt(NH3)2Cl2]
C
[Co(NH3)4Cl2]
D
[Co(NH3)5Cl]Cl2
3
JEE Main 2016 (Online) 10th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Identify the correct statement :
A
Iron corrodes in oxygen-free water.
B
Iron corrodes more rapidly in salt water because its electrochemical potential is higher.
C
Corrosion of iron can be minimized by forming a contact with another metal with a higher reduction potential.
D
Corrosion of iron can be minimized by forming an impermeable barrier at its surface.
4
JEE Main 2016 (Online) 10th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
An aqueous solution of a salt MX2 at certain temperature has a van’t Hoff factor of 2. The degree of dissociation for this solution of the salt is :
A
0.33
B
0.50
C
0.67
D
0.80
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