The graph which shows the variation of the de Broglie wavelength $(\lambda)$ of a particle and its associated momentum $(p)$ is?

When light propagates through a material medium of relative permittivity $\varepsilon_r$

The product formed from the following reaction sequence is:

Gadolinium has a low value of third ionisation enthalpy because of

Which one is not a correct mathematical equation for Dalton's Law of partial pressure? Here $p$ is the total pressure of a gaseous mixture

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).$\newline$Assertion (A): In a particular point defect, an ionic solid is electrically neutral, even if a few of its cations are missing from its unit cells.$\\$

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). $\newline$ Assertion (A) : $\newline$ Polymerase chain reaction is used in DNA amplification. $\newline$ Reason (R) : $\newline$ The ampicillin resistant gene is used as a selectable marker to check transformation. $\newline$ In the light of the above statements, choose the correct answer from the options given below: