1
JEE Main 2021 (Online) 27th July Morning Shift
+4
-1
For a reaction of order n, the unit of the rate constant is :
A
mol1$$-$$n L1$$-$$n s
B
mol1$$-$$n L2n s$$-$$1
C
mol1$$-$$n Ln$$-$$1 s$$-$$1
D
mol1$$-$$n L1$$-$$n s$$-$$1
2
JEE Main 2021 (Online) 25th July Morning Shift
+4
-1
For the following graphs,

Choose from the options given below, the correct one regarding order of reaction is :
A
(b) Zero order (c) and (e) First order
B
(a) and (b) Zero order (e) First order
C
(b) and (d) Zero order (e) First order
D
(a) and (b) Zero order (c) and (e) First order
3
JEE Main 2021 (Online) 22th July Evening Shift
+4
-1
Isotope(s) of hydrogen which emits low energy $$\beta$$$$-$$ particles with t1/2 value > 12 years is/are
A
Protium
B
Tritium
C
Deuterium
D
Deuterium and Tritium
4
JEE Main 2021 (Online) 25th February Evening Shift
+4
-1
Given below are two statements :

Statement I : The pH of rain water is normally $$-$$ 5.6.

Statement II : If the pH of rain water drops below 5.6, it is called acid rain.

In the light of the above statements, choose the correct answer from the options given below :
A
Both Statement I and Statement II are true.
B
Both Statement I and Statement II are false.
C
Statement I is true but Statement II is false.
D
Statement I is false but Statement II is true.
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Modern Physics
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