1
JEE Main 2019 (Online) 12th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
The correct sequence of thermal stability of the following carbonates is :
A
BaCO3 < SrCO3 < CaCO3 < MgCO3
B
MgCO3 < CaCO3 < SrCO3 < BaCO3
C
BaCO3 < CaCO3 < SrCO3 < MgCO3
D
MgCO3 < SrCO3 < CaCO3 < BaCO3
2
JEE Main 2019 (Online) 10th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
The highest possible oxidation states of uranium and plutonium, respectively are
A
4 and 6
B
6 and 4
C
7 and 6
D
6 and 7
3
JEE Main 2019 (Online) 10th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
The correct order of the first ionization enthalpies is :
A
Ti < Mn < Zn < Ni
B
Zn < Ni < Mn < Ti
C
Mn < Ti < Zn < Ni
D
Ti < Mn < Ni < Zn
4
JEE Main 2019 (Online) 10th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
The correct order of catenation is :
A
C > Sn > Si $$ \approx $$ Ge
B
Si > Sn > C > Ge
C
C > Si > Ge $$ \approx $$ Sn
D
Ge > Sn > Si > C
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