1
JEE Main 2019 (Online) 9th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Consider the given plot of enthalpy of the following reaction between A and B.
A+ B $$ \to $$ C + D
Identify the incorrect statement. JEE Main 2019 (Online) 9th April Evening Slot Chemistry - Chemical Kinetics and Nuclear Chemistry Question 166 English
A
Formation of A and B from C has highest enthalpy of activation.
B
D is kinetically stable product.
C
C is the thermodynamically stable product
D
Activation enthalpy to form C is 5kJ mol–1 less than that to form D.
2
JEE Main 2019 (Online) 9th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Which one of the following about an electron occupying the 1s orbital in a hydrogen atom is incorrect ?

(The Bohr radius is represented by a0)
A
The probability density of finding the electron is maximum at the nucleus.
B
The electron can be found at a distance 2a0 from the nucleus
C
The total energy of the electron is maximum when it is at a distance a0 from the nucleus.
D
The magnitude of potential energy is double that of its kinetic energy on an average.
3
JEE Main 2019 (Online) 9th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
HF has highest boiling point among hydrogen halides, because it has :
A
lowest dissociation enthalpy
B
strongest hydrogen bonding
C
lowest ionic character
D
strongest van der Waals' interactions
4
JEE Main 2019 (Online) 9th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
In an acid-base titration, 0.1 M HCl solution was added to the NaOH solution of unknown strength. Which of the following correctly shows the change of pH of the titraction mixture in this experiment?

JEE Main 2019 (Online) 9th April Evening Slot Chemistry - Ionic Equilibrium Question 105 English
A
(C)
B
(A)
C
(B)
D
(D)

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