Which of the following statements are correct about ozone?

It is used to disinfect water.

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

It absorbs ultraviolet rays.

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

It removes large objects from wastewater.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

It has no effect on wastewater.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct options are
A It is used to disinfect water.
B It absorbs ultraviolet rays.
Ozone has various usage. It is used to disinfect water. Germs and bacteria present in water get degrade when ozone is passed through water. Ozone also removes the foul smell from wastewater.
The ozone layer present in the atmosphere protects us from harmful ultraviolet rays by absorbing them.

Suggest Corrections

Similar questions

Study the following statements about ozone:

(a) It is essential for breathing of living organisms.

(b) It is used to disinfect water.

(d) Its proportion in air is about 3%.

Which of these statements are correct?

Q. Which of the following chemicals are used to disinfect water in a wastewater treatment plant?

Once wastewater is slowed down, it is let into large settlement tanks. Which of the following contaminants are removed as sludge in this process? (You may choose more than one option).

Question 20

Given below is a jumbled sequence of the processes involved in a wastewater treatment plant. Arrange them in their correct sequence.
(a) Sludge is scraped out and skimmer removes floating grease.
(b) Water is made to settle in a large tank with a slope in the middle.
(c) Large objects like plastic bags are removed by passing wastewater through bar screens.
(d) Sand, grit and pebbles are made to settle by decreasing the speed of incoming wastewater.
(e) Wastewater enters a grit and sand removal tank.

Question 21

Three statements are provided here which define the terms, i.e. sludge, sewage and wastewater. Pick out the correct definition for each of these terms.
(a) The settled solids that are removed in wastewater treatment with a scraper.
(b) Water from kitchen used for washing dishes.
(c) Wastewater released from homes, industries, hospitals and other public buildings.

Join BYJU'S Learning Program