Which of the following statements regarding Pi $(\pi)$ bond is NOT true ?

Identify the number of lone pair and bond pair electrons present in the valence shell of central atom in $\text{BrF}_3$.

A gas at $10\,^\circ\text{C}$ occupies a volume of 283 mL. if it is heated to $20\,^\circ\text{C}$ keeping the pressure constant. What is the new volume of gas ?

Calculate the quantity of heat released from system when 2 moles of and ideal gas compressed isothermally from volume $25 \text{ dm}^3$ to $10 \text{ dm}^3$ at constant external pressure 4 bar.