Where are the Cardamom Hills located?

Which of the following electronic configurations is not possible?

$A$ launching vehicle carrying an artificial satellite of mass $m$ is set for launch on the surface of the earth of mass $M$ and radius $R$. If the satellite is intended to move in a circular orbit of radius $7R$,the minimum energy required to be spent by the launching vehicle on the satellite is (Gravitational constant $= G$)

The number of moles of electrons required to deposit $36 \ g$ of $Al$ from an aqueous solution of $Al(NO_3)_3$ is (At. wt. of $Al = 27$)

Which of the following is involved in the catalysis of link reaction during aerobic respiration?

The number of sigma $(\sigma)$ bonds in $but-1-ene$ is: