1
JEE Main 2019 (Online) 12th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The combination of plots which does not represent isothermal expansion of an ideal gas is –

JEE Main 2019 (Online) 12th January Evening Slot Chemistry - Thermodynamics Question 110 English
A
A and D
B
B and D
C
B and C
D
A and C
2
JEE Main 2019 (Online) 12th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Given

(i)  C (graphite) + O2(g) $$ \to $$ CO2(g); $$\Delta $$rH$$^\Theta $$ = x kJ mol$$-$$1

(ii)  C(graphite) + $${1 \over 2}$$O2(g) $$ \to $$ CO(g); $$\Delta $$rH$$^\Theta $$ = y kJ mol$$-$$1

(iii)  CO(g) + $${1 \over 2}$$ O2(g) $$ \to $$ CO2(g); $$\Delta $$rH$$^\Theta $$ = z kJ mol$$-$$1

Based on the above thermochemical equations, find out which one of the following algebraic relationships is correct?
A
z = x + y
B
x = y + z
C
x = y – z
D
y = 2z – x
3
JEE Main 2019 (Online) 12th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
For diatomic ideal gas in a closed system, which of the following plots does not correctly describe the relation between various thermodynamic quantities?
A
JEE Main 2019 (Online) 12th January Morning Slot Chemistry - Thermodynamics Question 111 English Option 1
B
JEE Main 2019 (Online) 12th January Morning Slot Chemistry - Thermodynamics Question 111 English Option 2
C
JEE Main 2019 (Online) 12th January Morning Slot Chemistry - Thermodynamics Question 111 English Option 3
D
JEE Main 2019 (Online) 12th January Morning Slot Chemistry - Thermodynamics Question 111 English Option 4
4
JEE Main 2019 (Online) 11th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
For the equilibrium,
2H2O $$\rightleftharpoons$$ H3O+ + OH$$-$$, the value of $$\Delta $$Go at 298 K is approximately :
A
$$-$$ 80 kJ mol–1
B
100 kJ mol$$-$$1
C
$$-$$ 100 kJ mol$$-$$1
D
80 kJ mol–1
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