1
JEE Main 2019 (Online) 12th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
In a chemical reaction,

JEE Main 2019 (Online) 12th January Morning Slot Chemistry - Chemical Equilibrium Question 79 English
the initial concentration of B was 1.5 times of the concentration of A, but the equilibrium concentrations of A and B were found to be equal. The equilibrium constant (K) for the aforesaid chemical reaction is -
A
16
B
1
C
1/4
D
4
2
JEE Main 2019 (Online) 12th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Two solids dissociate as follows –
JEE Main 2019 (Online) 12th January Morning Slot Chemistry - Chemical Equilibrium Question 78 English
The total pressure when both the solids dissociated simultaneously is -
A
(x + y) atm
B
$$\left( {\sqrt {x + y} } \right)$$ atm
C
2$$\left( {\sqrt {x + y} } \right)$$ atm
D
x2 + y2 atm
3
JEE Main 2019 (Online) 11th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Consider the reaction
N2(g) + 3H2(g) $$\rightleftharpoons$$ 2NH3(g)

The equilibrium constant of the above reaction is Kp. If pure ammonia is left to dissociate, the partial pressure of ammonia at equilibrium is given by (Assume that PNH3 << Ptotal at equilibrium)
A
$${{{3^{{3 \over 2}}}{K_P^{{1 \over 2}}}{P^2}} \over 4}$$
B
$${{K_P^{{1 \over 2}}{P^2}} \over 4}$$
C
$${{{3^{{3 \over 2}}}{K_P^{{1 \over 2}}}{P^2}} \over 16}$$
D
$${{K_P^{{1 \over 2}}{P^2}} \over 16}$$
4
JEE Main 2019 (Online) 10th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
5.1 g NH4SH is introduced in 3.0 L evacuated flask at 327ºC. 30% of the solid NH4SH decomposed to NH3 and H2S as gases . The Kp of the reaction at 327oC is (R = 0.082 L atm mol–1 K–1, Molar mass of S = 32 g mol–1 molar mass of N = 14 g mol–1)
A
0.242 $$ \times $$ 10$$-$$4 atm2
B
1 $$ \times $$ 10–4 atm2
C
4.9 $$ \times $$ 10$$-$$3 atm2
D
0.242 atm2
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