If $x = \log_{5}(1000)$ and $y = \log_{7}(2058)$,then:

Aniline reacts with acetaldehyde to form

Which of the following is not a secondary messenger?

When radiation of wavelength $\lambda$ is incident on a metallic surface,the stopping potential is $4.8 \ V$. If the surface is illuminated with radiation of double the wavelength,then the stopping potential becomes $1.6 \ V$. The threshold wavelength for the surface is:

The value of escape velocity on a certain planet is $2 \, km/s$. Then the value of orbital speed for a satellite orbiting close to its surface is

If $A$ and $B$ are two sets,then $A \cap (A \cup B)'$ is equal to