1
IIT-JEE 2011 Paper 2 Offline
MCQ (Single Correct Answer)
+4
-1
Match the transformations in column I with appropriate options in column II

Column I
(A) CO2(s) $$\to$$ CO2(g)
(B) CaCO3(s) $$\to$$ CaO(s) + CO2(g)
(C) 2H $$\to$$ H2(g)
(D) P(white, solid) $$\to$$ P(red, solid)

Column II
(p) phase transition
(q) allotropic change
(r) $$\Delta H$$ is positive
(s) $$\Delta S$$ is positive
(t) $$\Delta S$$ is negative
A
A $$\to$$ p,r,s; B $$\to$$ r,s; C $$\to$$ t; D $$\to$$ p,q,t
B
A $$\to$$ r,s; B $$\to$$ p,s; C $$\to$$ t; D $$\to$$ p,q,t
C
A $$\to$$ p,r,s; B $$\to$$ r,s; C $$\to$$ r; D $$\to$$ p,t
D
A $$\to$$ p,r,s; B $$\to$$ r,s; C $$\to$$ t; D $$\to$$ q,t
2
IIT-JEE 2010 Paper 1 Offline
MCQ (Single Correct Answer)
+3
-0.75
The species which by definition has ZERO standard molar enthalpy of formation at 298 K is
A
Br2 (g)
B
Cl2 (g)
C
H2O (g)
D
CH4 (g)
3
IIT-JEE 2008 Paper 2 Offline
MCQ (Single Correct Answer)
+3
-1

Statement 1 : There is a natural asymmetry between converting work to heat and converting heat to work.

Statement 2 : No process is possible in which the sole result is the absorption of heat from a reservoir and its complete conversion into work.

A
Statement 1 is True, Statement 2 is True; Statement 2 is a CORRECT explanation for Statement 1.
B
Statement 1 is True, Statement 2 is True; Statement 2 is a NOT CORRECT explanation for Statement 1.
C
Statement 1 is True, Statement 2 is False.
D
Statement 1 is False, Statement 2 is True.
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