1
JEE Main 2019 (Online) 12th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Among the following compounds most basic amino acid is -
A
Lysine
B
Asparagine
C
Histidine
D
Serine
2
JEE Main 2019 (Online) 12th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The metal d-orbitals that are directly facing the ligands in K3[Co(CN)6] are -
A
dx2$$-$$y2 and dz2
B
dxy, dxz and dyz
C
dxz, dyz and dz2
D
dxy and dx2 $$-$$ y2
3
JEE Main 2019 (Online) 12th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The element with Z = 120 (not yet discovered) will be an/a -
A
Alkaline earth metal
B
Alkali metal
C
Transition metal
D
Inner transition metal
4
JEE Main 2019 (Online) 12th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The hardness of a water sample (in terms of equivalents of CaCO3) containing 10–3 M CaSO4 is (Molar mass of CaSO4 = 136 g mol–1)
A
90 ppm
B
100 ppm
C
50 ppm
D
10 ppm
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