Explain how `CO_2` is able to control fires.

Explain how a cat is able to land on its feet after a fall taking advantage of the principle of conservation of angular momentum.

Explain why KO_2 is paramagnetic?

Explain why NO_2 dimerises.

Give reasons. Water is not used to control fires involving electrical equipment.

Explain how a square is. a rhombus

Explain how a square is. a rectangle

Explain giving reason CO_2 is a gas while silica is a solid.

Explain how defects in a metal block can be detected using ultrasound.

Explain the following: Co (II) is stable in aquous solution but in the presence of the complexing agents, it is easily oxidised.