Treatment of Gases

Q.

State whether the following statements are true or false.

Electrostatic precipitators are used to overcome the emissions of poisonous gases like ${\mathrm{C}\mathrm{O}}_2$ and NO from automobiles.

1. True
2. False

Q.

Name any two devices used for removing particulate air pollutants.

Q. Electrostatic precipitators can remove upto 90% of from industrial waste gases.

1. particulate matter
2. cadmium
3. mine tailing

Q.

What percentage of dust particles can be removed if we use an electrostatic precipitator for the treatment of gaseous pollutants?

1. 75%

2. 60%

3. 90%

4. 95%

Q.

Scrubbers remove ___ pollution.

Q.

Match the following:
$$\begin{array}{cccc}& Column1& & Column2\\ \left(p\right)& Scrubber& \left(i\right)& 1000voltselectrodes\\ \left(q\right)& Catalyticconverter& \left(ii\right)& fluegascolumn\\ \left(r\right)& Electrostaticprecipitator& \left(iii\right)& redoxreactions\end{array}$$

1. p - (iii), q - (ii), r - (i)

2. p - (ii), q - (iii), r - (i)

3. p - (i), q - (ii), r - (iii)

4. p - (ii), q - (i), r - (iii)

Q.

Which of the following devices used for filtering polluted air?

1. Electrostatic precipitators

2. Electrically charged plates

3. Scrubbers

4. Electrodynamic precipitators

Q. Match the following:
$$\begin{array}{cccc}& Column1& & Column2\\ \left(p\right)& Scrubber& \left(i\right)& 1000voltselectrodes\\ \left(q\right)& Catalyticconverter& \left(ii\right)& fluegascolumn\\ \left(r\right)& Electrostaticprecipitator& \left(iii\right)& redoxreactions\end{array}$$

1. p - (iii), q - (ii), r - (i)
2. p - (i), q - (ii), r - (iii)
3. p - (ii), q - (i), r - (iii)
4. p - (ii), q - (iii), r - (i)

Q. Electrostatic precipitators (ESP) are used to control

1. pesticide pollution
2. air pollution
3. radioactive pollution
4. water pollution

Q.

Scrubbers are devices used to remove _________ pollutants

1. solid

2. liquid

3. heavy metal

4. gaseous

Q.

Match the following:
$$\begin{array}{cccc}& Column1& & Column2\\ \left(p\right)& Scrubber& \left(i\right)& 1000voltselectrodes\\ \left(q\right)& Catalyticconverter& \left(ii\right)& fluegascolumn\\ \left(r\right)& Electrostaticprecipitator& \left(iii\right)& redoxreactions\end{array}$$

1. p - (iii), q - (ii), r - (i)
2. p - (ii), q - (iii), r - (i)
3. p - (i), q - (ii), r - (iii)
4. p - (ii), q - (i), r - (iii)

Q.

Which of the following devices used for filtering polluted air?

1. Electrostatic precipitators

2. Electrically charged plates

3. Scrubbers

4. Electrodynamic precipitators