1
JEE Main 2019 (Online) 10th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Two pi and half sigma bonds are present in :
A
O2
B
N$$_2^ + $$
C
O$$_2^ + $$
D
N2
2
JEE Main 2019 (Online) 10th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Wilkinson catalyst is : (Et = C2H5)
A
[(Ph3P)3 RhCl]
B
[(Et3P)3RhCl]
C
[(Et3P)3IrCl]
D
[(Ph3P)3IrCl]
3
JEE Main 2019 (Online) 10th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The effect of lanthanoid contraction in the lanthanoid series of elements by and large means :
A
increase in atomic radii and decrease in ionic radii
B
increase in both atomic and ionic radii
C
decrease in both atomic and ionic radii
D
decrease in atomic radii and increase in ionic radii
4
JEE Main 2019 (Online) 10th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Water filled in two glasses A and B have BOD values of 10 and 20, respectively. The correct statement regarding them, is :
A
B is more polluted than A.
B
A is suitable for drinking, whereas B is not .
C
Both A and B are suitable for dirnking
D
A is more polluted than B.
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