1
JEE Main 2019 (Online) 12th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
In comparison to boron, berylium has :
A
lesser nuclear charge and greater first ionisation enthalpy
B
greater nuclear charge and greater first ionisation enthalpy
C
greater nuclear charge and lesser first ionisation enthalpy
D
lesser nuclear charge and lesser first ionisation ethalpy
2
JEE Main 2019 (Online) 12th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
The temporary hardness of a water sample is due to compound X. Boiling this sample converts X to compound Y. X and Y, respectively, are :
A
Mg(HCO3)2 and MgCO3
B
Ca(HO3)2 and CaO
C
Ca(HCO3)2 and Ca(OH)2
D
Mg(HCO3)2 and Mg(OH)2
3
JEE Main 2019 (Online) 12th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The compound used in the treatment of lead poisoning is :
A
desferrioxime B
B
Cis-platin
C
D-penicillamine
D
EDTA
4
JEE Main 2019 (Online) 12th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
In which one of the following equilibria, Kp $$ \ne $$ KC ?
A
2NO(g) ⇋ N2(g) + O2(g)
B
2C(s) + O2(g) ⇋ 2CO(g)
C
2HI(g) ⇋ H2(g) + I2(g)
D
NO2(g) + SO2(g) ⇋ NO(g) + SO3(g)
JEE Main Papers
2023
2021
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
CBSE
Class 12