1
JEE Main 2019 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Two complexes [Cr(H2O)6]Cl3 (A) and [Cr(NH3)6]Cl3 (B) are violet and yellow coloured, respectively. The incorrect statement regarding them is :
A
$$\Delta $$0 values of (A) and (B) are calculated from the energies of violet and yellow light, respectively
B
both are paramagnetic with three unpaired electrons
C
both absorb energies corresponding to their complementry colors.
D
$$\Delta $$0 value for (A) is less than that of (B).
2
JEE Main 2019 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The anodic half-cell of lead-acid battery is recharged using electricity of 0.05 Faraday. The amount of PbSO4 electrolyzed in g during the process is : (Molar mass of PbSO4 = 303 g mol$$-$$1)
A
22.8
B
15.2
C
7.6
D
11.4
3
JEE Main 2019 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The following results were obtained during kinetic studies of the reaction ;

2A + B $$ \to $$ Products

Experiment [A] (in mol L$$-$$1) [b] (in mol L$$-$$1) Initial Rate of reaction
(In mol L$$-$$1 min$$-$$1)
I 0.10 0.20 6.93 G 10$$-$$3
II 0.10 0.25 6.93 G 10$$-$$3
III 0.20 0.30 1.386 G 10$$-$$2


The time (in minutes) required to consume half of A is :
A
5
B
10
C
1
D
100
4
JEE Main 2019 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
For emission line of atomic hydrogen from ni = 8 to nf = n, the plot of wave number $$\left( {\overline v } \right)$$ against $$\left( {{1 \over {{n^2}}}} \right)$$ will be (The Rydberg constant, RH is in wave number unit)
A
Linear with intercept $$-$$RH
B
Non linear
C
Linear with slope RH
D
Linear with slope $$-$$RH
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