1
JEE Main 2020 (Online) 6th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The variation of equilibrium constant with temperature is given below :

Temperature Equilibrium Constant
T1 = 25oC K1 = 10
T2 = 100oC K2 = 100

The values of $$\Delta $$Ho, $$\Delta $$Go at
T1 and $$\Delta $$Go at T2 (in kJ mol–1) respectively, are close to :
[Use R = 8.314 J K–1 mol–1]
A
28.4, –5.71 and –14.29
B
0.64, –7.14 and –5.71
C
28.4, –7.14 and –5.71
D
0.64, –5.71 and –14.29
2
JEE Main 2020 (Online) 6th September Morning Slot
Numerical
+4
-0
Change Language
In an estimation of bromine by Carius method, 1.6 g of an organic compound gave 1.88 g of AgBr. The mass percentage of bromine in the compound is _______.
(Atomic mass, Ag = 108, Br = 80 g mol–1)
Your input ____
3
JEE Main 2020 (Online) 6th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The set that contains atomic numbers of only transition elements, is :
A
21, 32, 53, 64
B
9, 17, 34, 38
C
37, 42, 50, 64
D
21, 25, 42, 72
4
JEE Main 2020 (Online) 6th September Morning Slot
Numerical
+4
-0
Change Language
Potassium chlorate is prepared by the electrolysis of KCl in basic solution

6OH- + Cl- $$ \to $$ ClO3- + 3H2O + 6e-

If only 60% of the current is utilized in the reaction, the time (rounded to the nearest hour) required to produce 10 g of KClO3 using a current of 2 A is_________.

(Given : F = 96,500 C mol–1; molar mass of KCIO3 = 122 g mol–1)
Your input ____
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