Functioning of a Scrubber

Q. Catalytic converters help in converting carbon monoxide into __A__ and nitric oxide into ___B___.

1. A - carbon, B - nitrogen dioxide
2. A - carbon dioxide, B - nitrogen
3. A - carbon dioxide, B - nitrous oxide
4. A - carbon, B - nitrogen

Q. Motor vehicles equipped with catalytic converter are advised to use unleaded petrol because

1. lead reduces the emission of poisonous gases.
2. lead causes inactivation of catalyst.
3. lead is a heavy metal.
4. lead decreases the efficiency of vehicle.

Q. Scrubber removes gases such as

1. carbon monoxide
2. nitric oxide
3. ozone
4. sulphur dioxide

Q. In a catalytic converter, the unburnt hydrocarbons in the fuel are converted to ______________.

1. carbon
2. carbon monoxide
3. carbon dioxide and water vapour
4. carbon monoxide and water vapour

Q. Electrostatic precipitators remove particulate matter by which of the following methods ?

1. Coating dust particles with negative charge and collecting them on grounded plates
2. Coating dust particles with positive charge and collecting them on grounded plates
3. Washing dust particles away by spraying water
4. Using catalysts to breakdown particulate matter

Q. Read the following statements (A - D) related to catalytic converters and select the correct option stating true (T) or false (F).

A. Catalysts found in catalytic converters are expensive metals.
B. Two types of catalysts found in catalytic converters are platinum-palladium and platinum – rhodium.
C. Toxic byproducts undergo ionization reactions to convert into non hazardous substances.
D. Non hazardous carbon monoxide, nitrogen gas and water is released from the vehicle.

1. A - T, B - T, C - F and D - F
2. A - F, B - T, C - T and D - F
3. A - T, B - F, C - T and D - F
4. A - T, B - F, C - F and D - T

Q. Mention two advantages for preferring CNG over diesel as an automobile fuel. [1]

Q. Assertion: Air pollutants are either gaseous or particulate.

Reason: Catalytic converters greatly reduce emission from diesel vehicle.

1. Both the assertion and reason are true and the reason is the correct explanation of the assertion
2. Both the assertion and reason are true but the reason is not the correct explanation of the assertion
3. Assertion is true but the reason is false
4. Both the assertion and reason are false

Q. Catalytic converters are fitted into automobiles to reduce emission of harmful gases. Catalytic converters change unburnt hydrocarbons into ________________.

1. Carbon dioxide and Water
2. Carbon monooxide
3. Methane
4. Carbon dioxide and Methane

Q. Read the following statements carefully.
(i) An electrostatic precipitator removes particulate matter by imposing negative charge on them.
(ii) Catalytic converters convert unburnt hydrocarbons into ${CO}_2$ and water.
(iii) Peroxyacyl nitrates (PAN) is a secondary pollutant.
(iv) DDT is a non-biodegradable pollutant.
Which of the above statements are incorrect ?

1. None of these
2. (i) and (ii)
3. (iii) and (iv)
4. (i) and (iii)

Q. A scrubber in the exhaust of a chemical industrial plant removes:

1. Gases like sulphur dioxide
2. Particulate matter of the size 5 micrometre or above
3. Gases like ozone and methane
4. Particulate matter of the size 2.5 micrometer or less

Q. Compressed Natural Gas (CNG) is _____________.

1. Propane
2. Methane
3. Ethane
4. Butane

Q. A scrubber in the exhaust of a chemical industrial plant removes:

1. Gases like sulphur dioxide
2. Particulate matter of the size 5 micrometre or above
3. Particulate matter of the size 2.5 micrometer or less
4. Gases like ozone and methane

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. An efficient device to eliminate particulate matter from industrial emission is

1. Incineration
2. Pyrolysis
3. Cyclone separators
4. Electrostatic precipitators
5. Trajectory separators

Q. Catalytic converters, which are fitted into automobiles for reducing the emission of poisonous gases possess which of the following metals as catalyst ?

1. Platinum-Palladium
2. Rhodium
3. Lead
4. Both (a) and (b)

Q. In a catalytic converter, the unburnt hydrocarbons in the fuel are converted to ______________.

1. carbon
2. carbon monoxide
3. carbon dioxide and water vapour
4. carbon monoxide and water vapour

Q. A scrubber in the exhaust of a chemical industry removes

1. Hydrogen sulphide
2. Sulpher dioxide
3. Nitrous oxide
4. Carbon monoxide

Q. What is hybrid vehicle technology? Expalin is advantages with a suitable example?

Q. Suggest a few measures for controlling carbon dioxide levels in the atmosphere.

Q. A scrubber in the exhaust of a chemical industrial plant removes

1. Gases like Sulphur dioxide
2. Particulate matter of the size 5 micrometers or above
3. Gases like Nitrous oxide
4. Gases like ozone or methane

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

Q. A scrubber in the exhaust of a chemical industrial plant removes:

1. Gases like sulphur dioxide
2. Particulate matter of the size 5 micrometre or above
3. Gases like ozone and methane
4. Particulate matter of the size 2.5 micrometer or less

Q. Answer in 200 to 250 words:
Write a brief account of functioning of 'Electrostatic Precipitator' with diagram.

Q. Motor vehicles equipped with catalytic converter are advised to use unleaded petrol because

1. Lead is a heavy metal
2. Lead causes inactivation of catalyst present in catalytic converter
3. Lead increases burning of petrol
4. Lead decreases the efficiency of vehicle

Q. Owners of motor vehicles equipped with catalytic converters are advised to use unleaded petrol. Why?

Q. What makes black forest damaged by pollutants?

1. Feron I
2. CFCs
3. Automobiles
4. PAN

Q. Name the device used to remove
Particulate air pollutants

Q. Answer the following.
How does the pollution occur due to vehicles? Gives the names of vehicles causing least pollution?

Q. Which control measure is most effective way of controlling Hydrocarbon (HC)?

1. Absorption
2. Carbon Adsorption
3. Condensation
4. Incinertion