How many moles of potassium chlorate are heated to produce $11 \cdot 2$ L oxygen at STP ?

Find the energy of third stationary orbit of Bohr's model of hydrogen atom if the energy of ground state is $-E$ J

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 $\text{BrF}_3$.