1
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)
2
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
3
JEE Main 2020 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The major product Z obtained in the following reaction scheme is : JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Compounds Containing Nitrogen Question 138 English
A
JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Compounds Containing Nitrogen Question 138 English Option 1
B
JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Compounds Containing Nitrogen Question 138 English Option 2
C
JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Compounds Containing Nitrogen Question 138 English Option 3
D
JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Compounds Containing Nitrogen Question 138 English Option 4
4
JEE Main 2020 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of these will produce the highest yield in Friedel Crafts reaction?
A
JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Haloalkanes and Haloarenes Question 90 English Option 1
B
JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Haloalkanes and Haloarenes Question 90 English Option 2
C
JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Haloalkanes and Haloarenes Question 90 English Option 3
D
JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Haloalkanes and Haloarenes Question 90 English Option 4
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