1
JEE Main 2021 (Online) 25th February Evening Shift
Numerical
+4
-1
Change Language
The number of compound/s given below which contain/s -COOH group is __________. (Integer answer)

(A) Sulphanilic acid

(B) Picric acid

(C) Aspirin

(D) Ascorbic acid
Your input ____
2
JEE Main 2021 (Online) 25th February Evening Shift
Numerical
+4
-1
Change Language
The rate constant of a reaction increases by five times on increase in temperature from 27$$^\circ$$C to 52$$^\circ$$C. The value of activation energy in kJ mol$$-$$1 is _________. (Rounded off to the nearest integer)

[R = 8.314 J K$$-$$1mol$$-$$1]
Your input ____
3
JEE Main 2021 (Online) 25th February Evening Shift
Numerical
+4
-1
Change Language
Among the following, number of metal/s which can be used as electrodes in the photoelectric cell is _________. (Integer answer)

(A) Li

(B) Na

(C) Rb

(D) Cs
Your input ____
4
JEE Main 2021 (Online) 25th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
The contrapositive of the statement "If you will work, you will earn money" is :
A
If you will not earn money, you will not work
B
If you will earn money, you will work
C
You will earn money, if you will not work
D
To earn money, you need to work
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