1
JEE Main 2020 (Online) 3rd September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
100 mL of 0.1 M HCl is taken in a beaker and to it 100 mL of 0.1 M NaOH is added in steps of 2 mL and the pH is continuously measured. Which of the following graphs correctly depicts the change in pH?
A
JEE Main 2020 (Online) 3rd September Evening Slot Chemistry - Ionic Equilibrium Question 76 English Option 1
B
JEE Main 2020 (Online) 3rd September Evening Slot Chemistry - Ionic Equilibrium Question 76 English Option 2
C
JEE Main 2020 (Online) 3rd September Evening Slot Chemistry - Ionic Equilibrium Question 76 English Option 3
D
JEE Main 2020 (Online) 3rd September Evening Slot Chemistry - Ionic Equilibrium Question 76 English Option 4
2
JEE Main 2020 (Online) 3rd September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Three isomers A, B and C (mol. formula C8H11N) give the following results : JEE Main 2020 (Online) 3rd September Evening Slot Chemistry - Compounds Containing Nitrogen Question 170 English 1
R has lower boiling point than S
JEE Main 2020 (Online) 3rd September Evening Slot Chemistry - Compounds Containing Nitrogen Question 170 English 2
A, B and C, respectively are :
A
JEE Main 2020 (Online) 3rd September Evening Slot Chemistry - Compounds Containing Nitrogen Question 170 English Option 1
B
JEE Main 2020 (Online) 3rd September Evening Slot Chemistry - Compounds Containing Nitrogen Question 170 English Option 2
C
JEE Main 2020 (Online) 3rd September Evening Slot Chemistry - Compounds Containing Nitrogen Question 170 English Option 3
D
JEE Main 2020 (Online) 3rd September Evening Slot Chemistry - Compounds Containing Nitrogen Question 170 English Option 4
3
JEE Main 2020 (Online) 3rd September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The five successive ionization enthalpies of an element are 800, 2427, 3658, 25024 and 32824 kJ mol–1. The number of valence electrons in the element is :
A
2
B
3
C
4
D
5
4
JEE Main 2020 (Online) 3rd September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Consider the hypothetical situation where the azimuthal quantum number, $$l$$, takes values 0, 1, 2, ....., n + 1, where n is the principal quantum number. Then, the element with atomic number :
A
13 has a half-filled valence subshell
B
9 is the first alkali metal
C
8 is the first noble gas
D
6 has a 2p-valence subshell
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