1
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
Al2O3 is reduced by electrolysis at low potentials and high currents. If 4.0 $$ \times $$ 104 amperes of current is passed through molten Al2O3 for 6 hours, what mass of aluminium is product? (Assume 100% current efficiency, at mass of Al = 27 g mol$$-$$1).
A
8.1 $$ \times $$ 104 g
B
2.4 $$ \times $$ 105 g
C
1.3 $$ \times $$ 104 g
D
9.0 $$ \times $$ 103 g
2
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
For the reaction, N2 + 3H2 $$ \to $$ 2NH3, if
$${{d\left[ {N{H_3}} \right]} \over {dt}}$$ = 2 $$ \times $$ 10$$-$$4 mol L$$-$$1 s$$-$$1,
the value of $${{ - d\left[ {{H_2}} \right]} \over {dt}}$$ would be
A
4 $$ \times $$ 10$$-$$4 mol L$$-$$1 s$$-$$1
B
6 $$ \times $$ 10$$-$$4 mol L$$-$$1 s$$-$$1
C
1 $$ \times $$ 10$$-$$4 mol L$$-$$1 s$$-$$1
D
3 $$ \times $$ 10$$-$$4 mol L$$-$$1 s$$-$$1
3
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
Among the following which is the strongest oxidising agent?
A
Br2
B
I2
C
Cl2
D
F2
4
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
The stability of +1 oxidation state among Al, Ga, In and Tl increases in the sequence
A
Al < Ga < In < Tl
B
Tl < In < Ga < Al
C
In < Tl < Ga < Al
D
Ga < In < Al < Tl