Boron halides behave as Lewis acids because of their nature.

$A$ magnetic needle is kept in a non-uniform magnetic field. It experiences

$A$ person speaking normally produces a sound intensity level of $40\, dB$ at a distance of $1\, m$. If the threshold intensity level for reasonable audibility is $20\, dB$,the maximum distance at which he can be heard clearly is ..... $m$.

Which among the following complexes has square pyramidal geometry?

The radius of an atom is of the order of

In the circuit shown in the figure below, which of the following statements is incorrect?