NEET 2021 | Atoms and Nuclei Question 23 | Physics

NEET 2021

MCQ (Single Correct Answer)

-1

Out of Syllabus

The half life of a radioactive nuclide is 100 hours. The fraction of original activity that will remain after 150 hours would be :

$${2 \over {3\sqrt 2 }}$$

$${1 \over 2}$$

$${1 \over {2\sqrt 2 }}$$

$${2 \over 3}$$

NEET 2021

MCQ (Single Correct Answer)

-1

Out of Syllabus

A radioactive nucleus
$$_Z^AX$$ $$\to$$ $${}_{Z - 1}B$$ $$\to$$ $${}_{Z - 3}C$$ $$\to$$ $${}_{Z - 2}D$$,
where Z is the atomic number of element X. The possible decay particles in the sequence are :

$$\beta$$^$$-$$, $$\alpha$$, $$\beta$$⁺

$$\alpha$$, $$\beta$$^$$-$$, $$\beta$$⁺

$$\alpha$$, $$\beta$$⁺, $$\beta$$^$$-$$

$$\beta$$⁺, $$\alpha$$, $$\beta$$^$$-$$

NEET 2020 Phase 1

MCQ (Single Correct Answer)

-1

Out of Syllabus

When a uranium isotope $$_{92}^{235}U$$ is bombarded with a neutron, it generates $$_{36}^{89}Kr$$ three neutrons and :

$${}_{40}^{91}Zr$$

$${}_{36}^{101}Kr$$

$${}_{36}^{103}Kr$$

$${}_{56}^{144}Ba$$

NEET 2020 Phase 1

MCQ (Single Correct Answer)

-1

For which one of the following, Bohr model is not valid?

Singly ionised helium atom (He⁺)

Deuteron atom

Singly ionised neon atom (Ne⁺)

Hydrogen atom

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