The complex $[Pt(py)(NH_3)(Br)(Cl)]$ will have how many geometrical isomers?

The symbiotic association between algae and fungi is known as -

In the process of transcription in eukaryotes, the $\text{RNA}$ polymerase $\text{II}$ transcribes

The alkali metals form salt-like hydrides by direct synthesis at elevated temperatures. The thermal stability of these hydrides decreases in which of the following orders?

Two point charges $-q$ and $+q$ are located at points $(0, 0, -a)$ and $(0, 0, a)$ respectively. The electric potential at a point $(0, 0, z)$,where $z > a$ is

The value of $k$ such that the line $\frac{x - 4}{1} = \frac{y - 2}{1} = \frac{z - k}{2}$ lies in the plane $2x - 4y + z = 7$ is: