Uranium `""_(92)^(238)U` is not more suitable for chain reaction Why?

The polymerase chain reaction

Reaction the suitable reactant is

Why is polyester quite suitable for making dress materials ?

If the densities of nuclei of ""_(1) H^(1) and ""_(92) U^(238) are X and Y respectively ,then correct relation is

Which enzyme is used in the polymerase chain reaction?

The suitable reagent for the following reaction are :

Which water sample is suitable for drinking and why ?

After the emission of an alpha - particle from the atom ""_(92)^(238) X , the number of neutrons in the atom will be xyz , Y is___