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AIPMT 2010 Chemistry
Q. 45. The correct order of the decreasing ionic radii among the following is electronic species are:
Sol:
Among the isoelectronic species 
has the highest negative charge and hence largest in size followed by 
, 
and 
Answer : (3)
Q. 46. During the kinetic study of the reaction, 2A + B → C + D, following results were obtained:
| Run |  |
 |
Initial rate of formation of D/mol L−1 min−1 |
i |
0.1 |
0.1 |
|
II |
0.3 |
0.2 |
|
III |
0.3 |
0.4 |
|
IV |
0.4 |
0.1 |
|
Based on the above data which one of the following is correct?
Sol:
Keeping concentration of [A] constant, when the concentration of [B] is doubled, the rate quadruples. Hence it is second order with respect to B. Keeping the concentration of [B] constant, when the concentration of [A] is increased four
times, rate also increases four times. Hence the order with respect to A is one.
Answer: (4)