Question

Select the incorrect statement among the following-
A.${O_3}$ is used as germicide for purification of air
B.In ${O_3}$, O-O bond length is identical with that of molecular oxygen
C.${O_3}$ molecule is angular in shape
D.${O_3}$ is an oxidising agent

Answer 1

We need to know the properties of ${O_3}$ which is nothing but ozone. Ozone, often known as trioxygen, is an inorganic molecule having the formula ${O_3}$. It's a light blue gas with a strong unpleasant odour. It is an oxygen allotrope that is significantly less stable than the diatomic allotrope ${O_2}$, decomposing in the lower atmosphere to ${O_2}$.

Complete answer:
Ozone is a colourless, unstable gas. It is a strong oxidant as well as a germicide. In reality, ozone has far superior disinfection properties to chlorine and other frequently used disinfectants. Once created, ozone disintegrates quickly and returns to its original form of oxygen. The basic idea of current ozone-based cleaning technology is an ozone reaction with the attachment of the third oxygen molecule. Ozone, the most powerful germicide, is released into the atmosphere and quickly deals with any type of atmospheric pollution.
Hence option A. and D. are correct.
Electrons will repel the electron cloud of the two oxygen atoms on either end, according to the VSEPR (valence shell electron pair repulsion) hypothesis. The end O groups will be pulled down as a result, giving the ozone molecule a bent molecular geometry or V shape.
Hence, option C. is correct.
The length of the bond in ${O_3}$, and ${O_2}$ is not the same as that of molecular oxygen. It is discovered to have a bond length midway between $O - O$ and $O = O$. This is because of resonance. The bond angle of $O - O - O$ in ozone is $116.8A$ and the bond length of $O - O$ is $1.278A$.
Hence option B. is incorrect.

Hence option A. and D. are correct

Note:
We have to know that ozone is one of the most potent oxidising agents known, considerably more potent than dioxygen. At large quantities, it is likewise unstable and degrades into conventional oxygen. Its half-life is affected by atmospheric variables including temperature, humidity, and air movement. Most metals (excluding gold, platinum, and iridium) will be oxidised by ozone to oxides of the metals in their maximum oxidation state. Ozone may be utilised in combustion reactions and combustible gases; ozone offers greater temperatures than dioxygen burning.