1
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
The pyknometric density of sodium chloride crystal is 2.165 $$ \times $$ 103 kg m$$-$$3 while its X-ray density is 2.178 $$ \times $$ 103 kg m$$-$$3. The fraction of unoccupied sites in sodium chloride crystal is
A
5.96
B
5.96 $$ \times $$ 10$$-$$2
C
5.96 $$ \times $$ 10$$-$$1
D
5.96 $$ \times $$ 10$$-$$3
2
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
The e.m.f. of a Daniell cell at 298 K is E1.
AIPMT 2003 Chemistry - Electrochemistry Question 23 English
When the concentration of ZnSO4 is 1.0 M and that of CuSO4 is 0.01 M, the e.m.f. changed to E2. What is the relationship between E1 and E2?
A
E1 > E2
B
E1 < E2
C
E1 = E2
D
E2 = 0 $$ \ne $$ E1
3
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
On the basis of the information available from the reaction,

4/3Al + O2 $$ \to $$ 2/3Al2O3,   $$\Delta $$G = $$-$$ 827 kJ mol$$-$$1 of O2,

the minimum e.m.f. required to carry out an electrolysis of Al2O3 is
(F = 96500 C mol$$-$$1)
A
2.14 V
B
4.28 V
C
6.42 V
D
8.56 V
4
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
The temperature dependence of rate constant (k) of a chemical reaction is written in terms of Arrhenius equation, $$k = A \cdot {e^{ - E{}^ * /RT}}$$. Activation energy (E$$ * $$) of the reaction can be calculated by plotting
A
$$k\,\,vs\,\,T$$
B
$$k\,\,vs\,\,{1 \over {\log T}}$$
C
$$\log \,k\,\,vs\,\,{1 \over T}$$
D
$$\log \,k\,\,vs\,{1 \over {\log T}}$$
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