Which of the following is commonly used in a desiccator in the laboratory?

Which of the following is used as an antibiotic?

$A$ nucleus of uranium decays at rest into nuclei of thorium and helium. Then:

An inductive circuit contains a resistance of $10 \, \Omega$ and an inductance of $2.0 \, H$. If an $AC$ voltage of $120 \, V$ and frequency of $60 \, Hz$ is applied to this circuit,the current in the circuit would be nearly......$A$.

If the maximum velocity with which an electron can be emitted from a photocell is $4 \times 10^8 \,cm/sec$,the stopping potential is ............ $V$ (mass of electron $= 9 \times 10^{-31} \,kg$).

What is the foundation of any breeding program?