Radioactivity And Nuclear Chemistry - Physical Chemistry - Chemistry Previous Year Questions

1

2016 · Chemistry · Physical Chemistry · Radioactivity And Nuclear Chemistry

WB JEE 2016

If radium and chlorine combine to form radium chloride, the compound would be

A

half as radioactive as radium

B

twice as radioactive

C

as radioactive as radium

D

not radioactive

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2

2016 · Chemistry · Physical Chemistry · Radioactivity And Nuclear Chemistry

WB JEE 2016

An element E loses one \(\alpha\) and two \(\beta\)-particles in three successive stages. The resulting element will be

A

an isobar of E

B

an isotone of E

C

an isotope of E

D

E itself

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3

2017 · Chemistry · Physical Chemistry · Radioactivity And Nuclear Chemistry

WB JEE 2017

C₆H₅F¹⁸ is a F¹⁸ radio-isotope labelled organic compound. F¹⁸ decays by positron emission. The product resulting on decay is

A

C₆H₅O¹⁸

B

C₆H₅Ar¹⁹

C

B¹²C₅H₅F

D

C₆H₅O¹⁶

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4

2018 · Chemistry · Physical Chemistry · Radioactivity And Nuclear Chemistry

WB JEE 2018

The nucleus \(_{29}^{64}\)Cu accepts an orbital electron to yield,

A

\(_{28}^{65}\)Ni

B

\(_{30}^{64}\)Zn

C

\(_{28}^{64}\)Ni

D

\(_{30}^{65}\)Zn

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5

2018 · Chemistry · Physical Chemistry · Radioactivity And Nuclear Chemistry

WB JEE 2018

The half-life of C¹⁴ is 5760 years. For a 200 mg sample of C¹⁴, the time taken to change to 25 mg is

A

11520 years

B

23040 years

C

5760 years

D

17280 years

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6

2019 · Chemistry · Physical Chemistry · Radioactivity And Nuclear Chemistry

WB JEE 2019

The half-life period of \({}_{53}{I^{125}}\) is 60 days. The radioactivity after 180 days will be

A

25%

B

12.5%

C

33.3%

D

3.0%

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7

2019 · Chemistry · Physical Chemistry · Radioactivity And Nuclear Chemistry

WB JEE 2019

Consider, the radioactive disintegration

$${}_{82}{A^{210}}\buildrel {} \over \[\longrightarrow B\buildrel {} \over\] \[\longrightarrow C\buildrel {} \over\] \longrightarrow {}_{82}{A^{206}}$$

The sequence of emission can be

A

\(\beta\), \(\beta\), \(\beta\)

B

\(\alpha\), \(\alpha\), \(\beta\)

C

\(\beta\), \(\beta\), \(\gamma\)

D

\(\beta\), \(\beta\), \(\alpha\)

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8

2019 · Chemistry · Physical Chemistry · Radioactivity And Nuclear Chemistry

WB JEE 2019

Which atomic species cannot be used as a nuclear fuel?

A

\(_{92}^{233}\)U

B

\(_{92}^{235}\) U

C

\(_{94}^{239}\)Pu

D

\(_{92}^{238}\)U

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9

2021 · Chemistry · Physical Chemistry · Radioactivity And Nuclear Chemistry

WB JEE 2021

For the reaction \(_7^{14}N(\alpha ,p)\,{}^{17}O\), 1.16 MeV (Mass equivalent = 0.00124 amu) of energy is absorbed. Mass on the reactant side is 18.00567 amu and proton mass = 1.00782 amu. The atomic mass of \({}^{17}O\) will be

A

17.0044 amu

B

16.9991 amu

C

17.0114 amu

D

16.9966 amu

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10

2023 · Chemistry · Physical Chemistry · Radioactivity And Nuclear Chemistry

WB JEE 2023

If in case of a radio isotope the value of half-life (T\(_{1/2}\)) and decay constant (\(\lambda\)) are identical in magnitude, then their value should be

A

0.693/2

B

(0.693)\(^{1/2}\)

C

(0.693)\(^2\)

D

0.693

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11

2024 · Chemistry · Physical Chemistry · Radioactivity And Nuclear Chemistry

WB JEE 2024

After the emission of a \(\beta\)-particle followed by an \(\alpha\)-particle from \({ }_{83}^{214} \mathrm{Bi}\), the number of neutrons in the atom is -

A

210

B

128

C

129

D

82

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12

2025 · Chemistry · Physical Chemistry · Radioactivity And Nuclear Chemistry

WB JEE 2025

$$\begin{aligned} &{ }_5 \mathrm{~B}^{10}+{ }_2 \mathrm{He}^4 \rightarrow \mathrm{X}+{ }_0 \mathrm{n}^1\\\\ &\text { In the above nuclear reaction ' } X \text { ' will be } \end{aligned}$$

A

${ }_7 \mathrm{~N}^{14}$

B

${ }_7 \mathrm{~N}^{13}$

C

${ }_6 \mathrm{C}^{12}$

D

${ }_7 \mathrm{~N}^{12}$

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