1
JEE Main 2020 (Online) 2nd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
In general the property (magnitudes only) that show an opposite trend in comparison to other properties across a period is
A
Electron gain enthalpy
B
Electronegativity
C
Ionization enthalpy
D
Atomic radius
2
JEE Main 2020 (Online) 9th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The first and second ionisation enthalpies of a metal are 496 and 4560 kJ mol–1, respectively. How many moles of HCl and H2SO4, respectively, will be needed to react completely with 1 mole of the metal hydroxide ?
A
1 and 2
B
1 and 0.5
C
1 and 1
D
2 and 0.5
3
JEE Main 2020 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
B has a smaller first ionization enthalpy than Be. Consider the following statements :

(I) It is easier to remove 2p electron than 2s electron

(II) 2p electron of B is more shielded from the nucleus by the inner core of electrons than the 2s electrons of Be.

(III) 2s electron has more penetration power than 2p electron.

(IV) atomic radius of B is more than Be (Atomic number B = 5, Be = 4)

The correct statements are :
A
(I), (III) and (IV)
B
(II), (III) and (IV)
C
(I), (II) and (IV)
D
(I), (II) and (III)
4
JEE Main 2020 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The acidic, basic and amphoteric oxides, respectively, are :
A
Cl2O, CaO, P4O10
B
N2O3, Li2O, Al2O3
C
MgO, Cl2O, Al2O3
D
Na2O, SO3, Al2O3
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