1
JEE Main 2019 (Online) 8th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
For silver, Cp(J K–1 mol–1) = 23 +0.01 T. If the temperature (T) of 3 moles of silver is raised from 300 K to 1000 K at 1 atm pressure, the value of $$\Delta H$$ will be close to :
A
62 KJ
B
16 KJ
C
13 KJ
D
21 KJ
2
JEE Main 2019 (Online) 8th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The vapour pressures of pure liquids A and B are 400 and 600 mmHg, respectively at 298 K on mixing the two liquids, the sum of their initial volume is equal ot the volume of the final mixture. The mole fraction of liquid B is 0.5 in the mixture, The vapour pressure of the final solution, the mole fractions of components A and B in vapour phase, respectively are :
A
500 mmHg. 0.5,0.5
B
500 mmHg, 0.4, 0.6
C
450 mmHg, 0.4,0.6
D
450 mmHg.0.5,0.5
3
JEE Main 2019 (Online) 8th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Which is wrong with respect to our responsiblity as a human being to protect our environment?
A
Restricting the use of vehicles
B
Setting up compost tin in gardens.
C
Avoiding the use of floodlighted facilities
D
Using plastic bags.
4
JEE Main 2019 (Online) 8th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
For the reaction 2A + B $$ \to $$ C, the values of initial rate at diffrent reactant concentrations are given in the table below. The rate law for the reaction is :

[A] (mol L-1) [B] (mol L-1) Initial Rate (mol L-1s-1)
0.05 0.05 0.045
0.10 0.05 0.090
0.20 0.10 0.72
A
Rate = k[A][B]2
B
Rate = k[A]2[B]2
C
Rate = k[A]2[B]
D
Rate = k[A][B]
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