Related InterviewSolutions

• Uranium (`""_(92)U""^(238)`) decayed to `""_(82)Pb""^(206)`. The process is `""_(92)U""^(238)underset(xalpha,ybeta)to.""_(82)Pb""^(206)` `t""_(1//2)of U""^(238)=4.5xx10""^(9)` years x and y in above decay series areA. 6.8B. 9.6C. 8.8D. 8.6
• Uranium (`""_(92)U""^(238)`) decayed to `""_(82)Pb""^(206)`. The process is `""_(92)U""^(238)underset(xalpha,ybeta)to.""_(82)Pb""^(206)` `t""_(1//2)of U""^(238)=4.5xx10""^(9)` years The analysis of a rock shows the relative number of `U""^(238)` and `Pb""^(206)` atoms (Pb/U=0.25). The age of rock will beA. `2.303/0.693xx4.5xx10""^(9)log1.25`B. `2.303/0.693xx4.5xx10""^(9)log0.25`C. `2.303/0.693xx4.5xx10""^(9)log4`D. `2.303/(4.5xx10""^(9))xx0.693log4`
• Uranium (`""_(92)U""^(238)`) decayed to `""_(82)Pb""^(206)`. The process is `""_(92)U""^(238)underset(xalpha,ybeta)to.""_(82)Pb""^(206)` `t""_(1//2)of U""^(238)=4.5xx10""^(9)` years A sample of rock from South America contains equal number of atoms of `U""^(238)` and `Pb""^(""^(206)`. The age of the rock will beA. `4.5xx10""^(9)years`B. ?C. `13.5xx10""^(9)years`D. `2.25xx10""^(9)years`
• Uranium `._(92)U^(238)` decayed to `._(82)Pb^(206)`. They decay process is `._(92)U^(238) underset((x alpha, y beta))(rarr ._(82)Pb^(206))` `t_(1//2)` of `U^(238) = 4.5 xx 10^(9)` years A sample of rock south America contains equal number of atoms of `U^(238)` and `Pb^(206)`. The age of rock will beA. `4.5 xx 10^(9)` yearsB. `9 xx 10^(9)` yearsC. `13.5 xx 10^(9)` yearsD. `2.25 xx 10^(9)` years
• In the nuclear reaction `._(92)U^(238) rarr ._(82)Pb^(206)`, the number of alpha and beta particles decayed areA. `4 alpha, 3 beta`B. `8 alpha, 6 beta`C. `6 alpha, 4 beta`D. `7 alpha, 5 beta`
• Uranium `._(92)U^(238)` decayed to `._(82)Pb^(206)`. They decay process is `._(92)U^(238) underset((x alpha, y beta))(rarr ._(82)Pb^(206))` `t_(1//2)` of `U^(238) = 4.5 xx 10^(9)` years Atomic mass of `U^(238)` is 238.125 amu. Its packing fraction will beA. 6.25B. 0.125C. 12.5D. 5.25
• The half of `""_(92)""^(238)U` against `alpha`-decay is `4.5xx10""^(9)`year. The time taken in year for the decay of `15/16` part of the isotope isA. `9.0xx10""^(9)`B. `1.8xx10""^(10)`C. `4.5xx10""^(9)`D. `2.7xx10""^(10)`
• The total number of `alpha and beta` particles emitted in the nuclear reaction `._(92)^(238)U rarr ._(82)^(214)Pb` is
• A closed vessel with rigid walls contains 1 mol of `._(92)^(238)U` and 1 mole of air at 298K. Considering complete decay of `._(92)^(238)U " to " ._(82)^(206)Pb`, the ratio of the final pressure to the initial pressure of the system at 298 K is
• There are four radioactive decay series called thorium `(4n)`, uranium `(4n + 2)` actinium `(4n + 3)` and neptunium `(4n + 1)` series. Neptunium series is artificial while other three series are natural. The end productsd of each radioacitve decay series have stable nuclei. All natural decay series terminate at lead but neptunium or artificial series terminate at bismuth. Actinium series begins with an isotope ofA. ActiniumB. RadiumC. UraniumD. Polonium