61. To detect trace amounts of a gaseous species in a mixture of gases, the preferred probing tools is
62. In a Stern-Gerlach experiment, the magnetic field is in +Z direction. A particle comes out of this experiment in $$\left| { + {\bf{\hat z}} \uparrow > } \right.$$ state. Which of the following statements are true?
63. By capturing an electron, $${}_{25}^{54}{\text{M}}{{\text{n}}_{29}}$$ transforms into $${}_{25}^{54}{\text{C}}{{\text{r}}_{30}}$$ releasing
64. The order of magnitude of the binding energy per nucleon in a nucleus is
65. The plot of log A vs time t, where A is activity as shown in the figure, corresponds to decay
66. As one moves along the line of stability from 56Fe to 235U nucleus, the nuclear binding energy per particle decreases from about 8.8 MeV to 7.6 MeV. This trend is mainly due to the
67. Weak nuclear forces act on
68. The following gives a list of pairs containing
i. a nucleus
ii. one of its properties
Find the pair which is inappropriate
i. a nucleus
ii. one of its properties
Find the pair which is inappropriate