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1
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 27 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
2
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
In electrolysis of NaCl when Pt electrode is taken then H2 is liberated at cathode while with Hg cathode it forms sodium amalgam
A
Hg is more inert than Pt
B
More voltage is required to reduce H+ at Hg than at Pt
C
Na is dissolved in Hg while it does not dissolve in Pt
D
Conc. of H+ ions is larger when Pt electrode is taken.
3
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
Standard electrode potentials are
Fe2+/Fe [Eo = $$-$$0.44] and
Fe3+/Fe2+[ Eo = 0.77];
If Fe2+, Fe3+ and Fe blocks are kept together, then
A
Fe3+ increases
B
Fe3+ decreases
C
Fe2+/Fe3+ remains unchanged
D
Fe2+ decreases.
4
AIPMT 2000
MCQ (Single Correct Answer)
+4
-1
Cell reaction is spontaneous when
A
$$\Delta $$Go is negative
B
$$\Delta $$Go is positive
C
$$\Delta $$Eored is positive
D
$$\Delta $$Eored is negative
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