A radioactive element gets spilled over the floor of a room. Its half-life period is 30…
Chemistry · JEE Advanced · NTA Exams — Chemical Kinetics
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 ? (2007)
- 1000 days
- 300 days
- 10 days
- 100 days
Answer
(D) 100 days
Sign up free on Edukali to view the step-by-step worked solution and practice thousands of similar questions.
Related practice questions
- The rate constant, the activation energy and the Arrhenius parameter of a chemical reaction at 25 °C are…
- For a first order reaction : A ⇌ B, Whose concentration vs. time curve is as shown in the figure. The rate…
- For an endothermic reaction, where ∆H represents the enthalpy of reaction in kJ mol, the minimum value for…
- Estrification of acetic anhydride by ethanol takes place as (CH 3 CO) 2 O + C 2 H 5 OH → CH 3 COOC 2 H 5 + CH…
- The rate constant for the reaction 2N 2 O 5 → 4NO 2 + O 2 is 3.0 × 10 –5 sec –1 If the rate is 2.4×10 –5 mol…
- In a bimolecular reaction, the steric factor P was experimentaly determined to be 4.5 . the correct option(s)…
- For the reaction 4 A + B → 2 C + 2D, which of the following statement is not correct ?
- Ag + NH 3 ⇌ [Ag(NH 3 ) + ] ; k 1 = 6.8 × 10 –3 [Ag(NH 3 )] + + NH 3 ⇌ [Ag(NH 3 ) 2 ] + ; k 2 = 1.6 × 10 –3…
More Chemical Kinetics questions · Browse all practice questions