1
JEE Main 2019 (Online) 9th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
What would be the molality of 20% (mass/ mass) aqueous solution of KI?
(molar mass of KI = 166 g mol–1)
A
1.51
B
1.35
C
1.08
D
1.48
2
JEE Main 2019 (Online) 9th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The major products A and B for the following reactions are, respectively: JEE Main 2019 (Online) 9th April Evening Slot Chemistry - Compounds Containing Nitrogen Question 209 English
A
JEE Main 2019 (Online) 9th April Evening Slot Chemistry - Compounds Containing Nitrogen Question 209 English Option 1
B
JEE Main 2019 (Online) 9th April Evening Slot Chemistry - Compounds Containing Nitrogen Question 209 English Option 2
C
JEE Main 2019 (Online) 9th April Evening Slot Chemistry - Compounds Containing Nitrogen Question 209 English Option 3
D
JEE Main 2019 (Online) 9th April Evening Slot Chemistry - Compounds Containing Nitrogen Question 209 English Option 4
3
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.
4
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.

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