1
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
Change in enthalpy for reaction,

2H2O2(l) $$ \to $$ 2H2O(l) + O2(g)

if heat of formation of H2O2(l) and H2O(l) are $$-$$188 and - 286 kJ/mol respectively, is
A
$$-$$ 196 kJ/mol
B
+ 196 kJ/mol
C
+948 kJ/mol
D
$$-$$ 948 kJ/mol
2
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
When 1 mol of gas is heated at constant volume temperature is raised from 298 to 308 K. Heat supplied to the gas is 500 J. Then which statement is correct ?
A
q = w = 500 J, $$\Delta $$E = 0
B
q = $$\Delta $$E = 500 J, w = 0
C
q = w = 500 J, $$\Delta $$E = 0
D
$$\Delta $$E = 0, q = w = $$-$$ 500 J
3
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
PbO2  $$ \to $$ PbO; $$\Delta $$G298 < 0
SnO2 $$ \to $$ SnO;  $$\Delta $$G298 > 0

Most probable oxidation state of Pb and Sn will be
A
Pb4+, Sn4+
B
Pb4+, Sn2+
C
Pb2+, Sn2+
D
Pb2+, Sn4+
4
AIPMT 2000
MCQ (Single Correct Answer)
+4
-1
For the reaction,
C2H5OH(l) + 3O2(g) $$ \to $$ 2CO2(g) + 3H2O(l)
which one is true
A
$$\Delta $$H = $$\Delta $$E $$-$$RT
B
$$\Delta $$H = $$\Delta $$E + RT
C
$$\Delta $$H = $$\Delta $$E + 2RT
D
$$\Delta $$H = $$\Delta $$E $$-$$ 2RT
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