WB JEE 2019 | Radioactivity and Nuclear Chemistry Question 3 | Chemistry

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WB JEE 2019

MCQ (Single Correct Answer)

-0.33

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

25%

12.5%

33.3%

3.0%

WB JEE 2019

MCQ (Single Correct Answer)

-0.33

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

$$\beta$$, $$\beta$$, $$\beta$$

$$\alpha$$, $$\alpha$$, $$\beta$$

$$\beta$$, $$\beta$$, $$\gamma$$

$$\beta$$, $$\beta$$, $$\alpha$$

WB JEE 2019

MCQ (Single Correct Answer)

-0.33

Which atomic species cannot be used as a nuclear fuel?

$$_{92}^{233}$$U

$$_{92}^{235}$$ U

$$_{94}^{239}$$Pu

$$_{92}^{238}$$U

WB JEE 2018

MCQ (Single Correct Answer)

-0.33

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

11520 years

23040 years

5760 years

17280 years

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