1
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
For the reaction, 2A + B $$ \to $$ 3C + D, which of the following does not express the reaction rate?
A
$$ - {{d\left[ A \right]} \over {2dt}}$$
B
$$ - {{d\left[ C \right]} \over {3dt}}$$
C
$$ - {{d\left[ B \right]} \over {dt}}$$
D
$$ {{d\left[ D \right]} \over {dt}}$$
2
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
A hypothetical electrochemical cell is shown below.

$$A\left| {{A^ + }\left( {xM} \right)} \right|\left| {{B^ + }\left( {yM} \right)} \right|B$$

The emf measured is + 0.20 V. The cell reaction is
A
A + B+ $$ \to $$ A+ + B
B
A+ + B $$ \to $$ A + B+
C
A+ + e$$-$$ $$ \to $$ A;  B+ + e$$-$$ $$ \to $$ B
D
the cell reaction cannot be predicted.
3
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
1.00 g of a non-electrolyte solute (molar mass 250 g mol$$-$$1) was dissolved in 51.2 g of benzene. If the freezing point depression constant, Kf of benzene is 5.12 K kg mol$$-$$1, the freezing point of benzene will be lowered by
A
0.2 K
B
0.4 K
C
0.3 K
D
0.5 K
4
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
In which of the following molecules are all the bonds are not equal?
A
NF3
B
ClF3
C
BF3
D
AlF3