JEE Advanced 2013 · Paper 2 · Physics Q19

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PhysicsList match+3 / -1Question 19 of 60

Match List I of the nuclear processes with List II containing parent nucleus and one of the end products of each process and then select the correct answer using the codes given below the lists:

List I

P
Alpha decay
Q
$\beta^+$ decay
R
Fission
S
Proton emission

List II

1
$^{15}_8\mathrm O\to{}^{15}_7\mathrm N+\ldots$
2
$^{238}_{92}\mathrm U\to{}^{234}_{90}\mathrm{Th}+\ldots$
3
$^{185}_{83}\mathrm{Bi}\to{}^{184}_{82}\mathrm{Pb}+\ldots$
4
$^{239}_{94}\mathrm{Pu}\to{}^{140}_{57}\mathrm{La}+\ldots$

P → 4; Q → 2; R → 1; S → 3

P → 1; Q → 3; R → 2; S → 4

P → 2; Q → 1; R → 4; S → 3

P → 4; Q → 3; R → 2; S → 1

Answer and worked solution

Official answer: C

α decay: $^{238}$ U → $^{234}$ Th (A − 4, Z − 2). → 2
β⁺ decay: $^{15}$ O → $^{15}$ N (Z − 1, same A). → 1
Fission: $^{239}$ Pu → $^{140}$ La + … → 4
Proton emission: $^{185}$ Bi → $^{184}$ Pb (A − 1, Z − 1). → 3

Code 2 1 4 3.

(C)

Topics:Radioactive decay Nuclear fission and fusion

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JEE Advanced 2013 · Paper 2, Physics question 19