Question

Assertion (A): The beta particle resides inside the nucleus of atom in the form of electron.

Reason (R): Inside the nucleus, the change of a neutron into a proton and an elecron causes the emission of a β-particle \[ \left( {}^{1}_{0}n \longrightarrow {}^{1}_{1}p + {}^{\phantom{-}0}_{-1}e \right) \].

विकल्प

• Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).

• Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A).

• Assertion (A) is false, but Reason (R) is true.

• Assertion (A) is true, but Reason (R) is false.

Answer 1

Assertion (A) is false, but Reason (R) is true.

Explanation:

The beta particle does not exist inside the nucleus as a permanent electron. During beta decay, a neutron changes into a proton and an electron inside the nucleus, and the electron is emitted immediately as a beta particle. So Assertion (A) is false, while Reason (R) is true.