List of top Chemistry Questions on Nuclear physics

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

$C_{6}H_{5}F^{18}$ is a $F^{18}$ radio-isotope labelled organic compound. $F^{18}$ decays by positron emission. the product resulting on decay is

$1 \,g$ of $U -235$ is converted into $UF _{6}$. The radioactivity of $UF _{6}$ thus obtained is :

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

If the bond dissociation energies of $X Y, X_{2}$ and $Y_{2}$ (all diatomic molecules) are in the ratio of $1: 1: 0.5$ and $\Delta H_{f}$ for the formation of $X Y$ is $-200\, kJ \,mol ^{-1}$. The bond dissociation energy of $X_{2}$ will be

The mass of helium atom of mass number $4$ is $4.0026$ amu, while that of the neutron and proton are $1.0087$ and $1.0078$ respectively on the same scale. Hence, the nuclear binding energy per nucleon in the helium atom is nearly

A nuclear reaction of $^{235}_{92}U$ with a neutron produces $^{90}_{36}Kr$ and two neutrons. Other element produced in this reaction is

What is the fuel of atomic pile ?

Which of the following nuclear reactions will generate an isotope?

$ _{11}N{{a}^{23}} $ is formed from $ _{11}N{{a}^{24}} $ by the

The half-life period of a radioactive material is $15\, \min.$ What per cent of radioactivity of that material will remain after $45$ minutes?

Hydrogen bomb is based on the principle of :

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

The first artificial disintegration of an atomic nucleus was achieved by:

In which of the following nuclear reaction X and Y are isotopes?