1
AIEEE 2007
MCQ (Single Correct Answer)
+4
-1
A radioactive element gets spilled over the floor of a room. Its half-life period is 30 days. If the initial activity is ten times the permissible value, after how many days will it be safe to enter the room?
A
1000 days
B
300 days
C
10 days
D
100 days
2
AIEEE 2007
MCQ (Single Correct Answer)
+4
-1
Which of the following nuclear reactions will generate an isotope?
A
neutron particle emission
B
positron emission
C
$$\alpha$$-particle emission
D
$$\beta$$-particle emission
3
AIEEE 2006
MCQ (Single Correct Answer)
+4
-1
Rate of a reaction can be expressed by Arrhenius equation as:
$$$k = A\,{e^{ - E/RT}}$$$ In this equation, E represents
A
the energy above which all the colliding molecules will react
B
the energy below which colliding molecules will not react
C
the total energy of the reacting molecules at a temperature, T
D
the fraction of molecules with energy greater than the activation energy of the reaction
4
AIEEE 2006
MCQ (Single Correct Answer)
+4
-1
A reaction was found to be second order with respect to the concentration of carbon monoxide. If the concentration of carbon monoxide is doubled, with everything else kept the same, the rate of reaction will
A
remain unchanged
B
triple
C
increase by a factor of 4
D
double
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