1
JEE Main 2019 (Online) 11th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Match the metals (column I) with the coordination compound(s)/enzyme(s) (column II)

(Column I) Metals
(Column II) Coordination
compounds(s) enzyme(s)
(A) Co (i) Wilkinson catalyst
(B) Zn (ii) Chlorophyl
(C) Rh (iii) Vitamin B12
(D) Mg (iv) Carbonic anhydrase
A
(A)-(iii); (B)-(iv); (C)-(i); (D)-(ii)
B
(A)-(iv); (B)-(iii); (C)-(i); (D)-(ii)
C
(A)-(i); (B)-(ii); (C)-(iii); (D)-(iv)
D
(A)-(ii); (B)-(i); (C)-(iv); (D)-(iii)
2
JEE Main 2019 (Online) 11th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
The concentration of dissolved oxygen (DO) in cold water can go upto :
A
14 ppm
B
16 ppm
C
8 ppm
D
10 ppm
3
JEE Main 2019 (Online) 11th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
The chloride that CANNOT get hydrolysed is :
A
SnCl4
B
SiCl4
C
PbCl4
D
CCl4
4
JEE Main 2019 (Online) 11th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Peroxyacetyl nitrate (PAN), an eye irritant is produced by :
A
classical smog
B
acid rain
C
photochemical smog
D
organic waste
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