Radioactivity
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
PHXII13:NUCLEI

363983 If half-life of an element is \(69.3\,h\), then how much of its percent will decay in \(10\,th\) to \(11\,th\,h\)? (Initial activity \( = 50\,\mu \,Ci)\)

1 \(1 \%\)
2 \(2 \%\)
3 \(3 \%\)
4 \(4 \%\)
PHXII13:NUCLEI

363984 Substance \(A\) has atomic mass number 16 and half life of 1 day. Another substance \(B\) has atomic mass number 32 and half life of \(1 / 2\) day. If both \(A\) and \(B\) simultaneously start undergo radioactivity at the same time with initial mass \(320\,g\) each, how many total atoms of \(A\) and \(B\) combined would be left after 2 days.

1 \(3.38 \times 10^{24}\)
2 \(6.76 \times 10^{24}\)
3 \(1.69 \times 10^{24}\)
4 \(6.76 \times 10^{23}\)
PHXII13:NUCLEI

363985 A radioactive sample \({S_1}\) having the activity \({A_1}\)has twice the number of nuclei as another sample of \({S_2}\) activity \({A_2}\). If \({A_2} = 2{A_1}\), then the ratio of half life of \({S_1}\) to the life of \({S_2}\) is

1 \(4\)
2 \(2\)
3 \(0.25\)
4 \(0.75\)
PHXII13:NUCLEI

363986 The fraction \(f\) of radioactive material that has decayed in time \(t\), varies with time \(t\). The correct variation is given by the curve
supporting img

1 \(A\)
2 \(B\)
3 \(C\)
4 \(D\)
PHXII13:NUCLEI

363983 If half-life of an element is \(69.3\,h\), then how much of its percent will decay in \(10\,th\) to \(11\,th\,h\)? (Initial activity \( = 50\,\mu \,Ci)\)

1 \(1 \%\)
2 \(2 \%\)
3 \(3 \%\)
4 \(4 \%\)
PHXII13:NUCLEI

363984 Substance \(A\) has atomic mass number 16 and half life of 1 day. Another substance \(B\) has atomic mass number 32 and half life of \(1 / 2\) day. If both \(A\) and \(B\) simultaneously start undergo radioactivity at the same time with initial mass \(320\,g\) each, how many total atoms of \(A\) and \(B\) combined would be left after 2 days.

1 \(3.38 \times 10^{24}\)
2 \(6.76 \times 10^{24}\)
3 \(1.69 \times 10^{24}\)
4 \(6.76 \times 10^{23}\)
PHXII13:NUCLEI

363985 A radioactive sample \({S_1}\) having the activity \({A_1}\)has twice the number of nuclei as another sample of \({S_2}\) activity \({A_2}\). If \({A_2} = 2{A_1}\), then the ratio of half life of \({S_1}\) to the life of \({S_2}\) is

1 \(4\)
2 \(2\)
3 \(0.25\)
4 \(0.75\)
PHXII13:NUCLEI

363986 The fraction \(f\) of radioactive material that has decayed in time \(t\), varies with time \(t\). The correct variation is given by the curve
supporting img

1 \(A\)
2 \(B\)
3 \(C\)
4 \(D\)
PHXII13:NUCLEI

363983 If half-life of an element is \(69.3\,h\), then how much of its percent will decay in \(10\,th\) to \(11\,th\,h\)? (Initial activity \( = 50\,\mu \,Ci)\)

1 \(1 \%\)
2 \(2 \%\)
3 \(3 \%\)
4 \(4 \%\)
PHXII13:NUCLEI

363984 Substance \(A\) has atomic mass number 16 and half life of 1 day. Another substance \(B\) has atomic mass number 32 and half life of \(1 / 2\) day. If both \(A\) and \(B\) simultaneously start undergo radioactivity at the same time with initial mass \(320\,g\) each, how many total atoms of \(A\) and \(B\) combined would be left after 2 days.

1 \(3.38 \times 10^{24}\)
2 \(6.76 \times 10^{24}\)
3 \(1.69 \times 10^{24}\)
4 \(6.76 \times 10^{23}\)
PHXII13:NUCLEI

363985 A radioactive sample \({S_1}\) having the activity \({A_1}\)has twice the number of nuclei as another sample of \({S_2}\) activity \({A_2}\). If \({A_2} = 2{A_1}\), then the ratio of half life of \({S_1}\) to the life of \({S_2}\) is

1 \(4\)
2 \(2\)
3 \(0.25\)
4 \(0.75\)
PHXII13:NUCLEI

363986 The fraction \(f\) of radioactive material that has decayed in time \(t\), varies with time \(t\). The correct variation is given by the curve
supporting img

1 \(A\)
2 \(B\)
3 \(C\)
4 \(D\)
PHXII13:NUCLEI

363983 If half-life of an element is \(69.3\,h\), then how much of its percent will decay in \(10\,th\) to \(11\,th\,h\)? (Initial activity \( = 50\,\mu \,Ci)\)

1 \(1 \%\)
2 \(2 \%\)
3 \(3 \%\)
4 \(4 \%\)
PHXII13:NUCLEI

363984 Substance \(A\) has atomic mass number 16 and half life of 1 day. Another substance \(B\) has atomic mass number 32 and half life of \(1 / 2\) day. If both \(A\) and \(B\) simultaneously start undergo radioactivity at the same time with initial mass \(320\,g\) each, how many total atoms of \(A\) and \(B\) combined would be left after 2 days.

1 \(3.38 \times 10^{24}\)
2 \(6.76 \times 10^{24}\)
3 \(1.69 \times 10^{24}\)
4 \(6.76 \times 10^{23}\)
PHXII13:NUCLEI

363985 A radioactive sample \({S_1}\) having the activity \({A_1}\)has twice the number of nuclei as another sample of \({S_2}\) activity \({A_2}\). If \({A_2} = 2{A_1}\), then the ratio of half life of \({S_1}\) to the life of \({S_2}\) is

1 \(4\)
2 \(2\)
3 \(0.25\)
4 \(0.75\)
PHXII13:NUCLEI

363986 The fraction \(f\) of radioactive material that has decayed in time \(t\), varies with time \(t\). The correct variation is given by the curve
supporting img

1 \(A\)
2 \(B\)
3 \(C\)
4 \(D\)