List of top Chemistry Questions on Nuclear physics asked in JEE Advanced

${ }_{92}^{238} U$ is known to undergo radioactive decay to form ${ }_{82}^{206} Pb$ by emitting alpha and beta particles. A rock initially contained $68 \times 10^{-6} g$ of ${ }_{92}{ }^{238} U$. If the number of alpha particles that itwould emit during its radioactive decay of ${ }_{92}^{238} U$ to ${ }_{82}{ }^{206} Pb$ in three half-lives is $Z \times 10^{18}$, then what is the value of $Z$ ?

Bombardment of aluminium by a-particle leads to its artificial disintegration in two ways, (i) and (ii) as shown. Products X , Y and Z respectively, are

The number of neutrons accompanying the formation of $^{139}_{54}Xe \, \, and \, \, ^{94}_{38}Sr$ from the absorption of a slow neutron by $^{235}_{92}U,$ followed by nuclear fission is