Related InterviewSolutions

• A radioactive sample has a disintegration rate of `36 xx 10^(50)` disintegration per minute. The sample itself consisting of `10^(-5)``mu` mole of the active nuclei. The disintegration constant, `lambda` is given byA. `6 xx 10^(-7)`` s^(-1)`B. `6 xx 10^(15)`` s^(-1)`C. ` 6 xx 10^(9)` ` s ^(-1)`D. `10^(-8)` ` s^(-1)`
• Calculate in how many months , `(3/4)^(th) `of the substance will dacay, If half-life of the radioactive substance is 2 months.A. 4 monthsB. 6 monthsC. 8 monthsD. 14 months
• The radius of `Na^(23)` nucleus isA. `3.125 xx 10^(-15) m`B. `23 xx 10^(-15) m`C. `11 xx 10^(-15) m `D. `1.1 xx 10^(-15) m`
• A sample contains 1 kg `O^(19) ` nuclei . The sample decays according to following equation `O^(19) to F^(19) + e + barv` The mass of sample after one half-life period isA. lesser than 1/2 kgB. equal to 1/2 kgC. slightly less than 1 kgD. equal to 1 kg
• Consider two nuclei of the same radioactive nucclide . One of the nuclei was created in a supernova explsion 5 billions year ago . The probability of decay during the next time isA. different for each nucleiB. nuclei created in explosion decays firstC. nuclei created in the reactor decays firstD. Independent of the time of creation
• If reactor takes 30 day to consume 4 kg of fuel and each fission gives 185 MeV of usable energy , then calculate the power output.A. `2.75 xx 10^(10)` WB. `0.012 xx 10^(10)` WC. `3.5 xx 10^(10)` WD. ` 7.63 xx 10^(10)` W
• How long will it take for 75% of the atoms of a certain radioactive element, originally present to disintegrate ? The half-life of the element is 10 days.A. 240 daysB. 3.6 daysC. 15.6 daysD. 4.15 days
• A heavy nucleus (mass number = A) splits into two new nuclei, whose mass numbers are in the ratio 3:2 . The ratio of radii of these new nuclei isA. `3:2`B. `2:3`C. `3^(1//3):2^(1//3)`D. `2^(1//3) : 3^(1//3)`
• `O^(19)` `:-` `F^(19)` + e + v In this decay , the rest mass energy of `O^(19)` and `F^(19)` are 17692.33 MeV and 17687.51 MeV respectively . The Q factor of the dacay isA. 4.82 MeVB. 7 MeVC. 17.69 MeVD. None of these
• Find the mass of electron in atmoic mass unit.A. 0,0005498B. 0.5119C. 0.5498D. None