1
JEE Main 2019 (Online) 9th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The maximum number of possible oxidation states of actinoides are shown by :
A
nobelium (No) and lawrencium (Lr)
B
actinium (Ac) and thorium (Th)
C
neptunium (Np) and plutonium (Pu)
D
berkelium (Bk) and californium (Cf)
2
JEE Main 2019 (Online) 9th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Molal depression constant for a solvent is 4.0 kg mol–1. The depression in the freezing point of the solvent for 0.03 mol kg–1 solution of K2SO4 is :
(Assume complete dissociation of the electrolyte)
A
0.18 K
B
0.24 K
C
0.36 K
D
0.12 K
3
JEE Main 2019 (Online) 9th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Noradrenaline is a/an
A
Antacid
B
Antihistamine
C
Neurotransmitter
D
Antidepressant
4
JEE Main 2019 (Online) 9th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Hinsberg's reagent is :
A
C6H5COCl
B
C6H5SO2Cl
C
SOCl2
D
(COCl)2
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