1
JEE Main 2020 (Online) 4th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
On combustion of Li, Na and K in excess of air, the major oxides formed, respectively, are :
A
Li2O, Na2O2 and K2O
B
Li2O2, Na2O2 and K2O2
C
Li2O, Na2O2 and KO2
D
Li2O, Na2O and K2O2
2
JEE Main 2020 (Online) 4th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Match the following :

(i) Foam (a) smoke
(ii) Gel (b) cell fluid
(iii) Aerosol (c) jellies
(iv) Emulsion (d) rubber
(e) froth
(f) Milk
A
(i)-(e), (ii)-(c), (iii)-(a), (iv)-(f)
B
(i)-(d), (ii)-(b), (iii)-(a), (iv)-(e)
C
(i)-(d), (ii)-(b), (iii)-(e), (iv)-(f)
D
(i)-(b), (ii)-(c), (iii)-(e), (iv)-(d)
3
JEE Main 2020 (Online) 4th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
For the equilibrium A ⇌ B , the variation of the rate of the forward (a) and reverse (b) reaction with time is given by :
A
JEE Main 2020 (Online) 4th September Morning Slot Chemistry - Chemical Equilibrium Question 54 English Option 1
B
JEE Main 2020 (Online) 4th September Morning Slot Chemistry - Chemical Equilibrium Question 54 English Option 2
C
JEE Main 2020 (Online) 4th September Morning Slot Chemistry - Chemical Equilibrium Question 54 English Option 3
D
JEE Main 2020 (Online) 4th September Morning Slot Chemistry - Chemical Equilibrium Question 54 English Option 4
4
JEE Main 2020 (Online) 4th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The region in the electromagnetic spectrum where the Balmar series lines appear is :
A
Microwave
B
Ultraviolet
C
Visible
D
Infrared
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