AIEEE 2007 | Chemical Kinetics and Nuclear Chemistry Question 159 | Chemistry

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?

1000 days

300 days

10 days

100 days

AIEEE 2007

MCQ (Single Correct Answer)

-1

Which of the following nuclear reactions will generate an isotope?

neutron particle emission

positron emission

$$\alpha$$-particle emission

$$\beta$$-particle emission

AIEEE 2006

MCQ (Single Correct Answer)

-1

Rate of a reaction can be expressed by Arrhenius equation as:
$$$k = A\,{e^{ - E/RT}}$$$ In this equation, E represents

the energy above which all the colliding molecules will react

the energy below which colliding molecules will not react

the total energy of the reacting molecules at a temperature, T

the fraction of molecules with energy greater than the activation energy of the reaction

AIEEE 2006

MCQ (Single Correct Answer)

-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

remain unchanged

triple

increase by a factor of 4

double

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