The figure given below represents a device. Study the same and answer the following questions:

(a) Identify the device.

(b) Mention the specific purpose for which we can use this device.

(c) Label the guidelines 1, 2, 3 and 4.

(d) Name another similar kind of device which can also be used for the same purpose.

(e) Draw a neat and labelled diagram of the device mentioned by you in part (4) above.

(a) Scrubber.

(b) To remove gaseous and particulate air pollutants.

(c) The labelled guidelines are :

• 1 → Clean air
• 2 → Water spray
• 3 → Particulate matter
• 4 → Dirty air

(d) Electrostatic precipitator.

(e) Below is a neat and labelled diagram of an electrostatic precipitator :