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Home › Grade8 › Grade 8 CBSE › Chemistry › Coal & Petroleum › Coal and petroleum Worksheet-9

Coal and petroleum Worksheet-9

Coal and petroleum Worksheet-9

 

Fill in the blanks:

  1. Process of separation of different constituents from petroleum is called ____.

 

  1. Least polluting fuel for vehicle is _____.

 

True / False:

  1. Fossil fuels can be made in the laboratory.

 

  1. CNG is more polluting fuel than petrol.

 

  1. Coke is almost pure form of carbon.

 

  1. Coal tar is a mixture of various substances.

 

  1. Kerosene is not a fossil fuel.

 

Answer:

  1. Refining

 

  1. CNG (compressed natural gas)

 

  1. False

Explanation: Long time period is required for the formation of fossil fuels. The conditions required cannot be created in laboratory hence Fossil fuels cannot be made in Laboratory.

 

  1. False

Explanation: CNG is a cleaner fuel than petrol.

 

  1. True

Explanation: Coke contains 98% carbon.

 

  1. True

Explanation: Coal tar is a brown or black liquid of extremely high viscosity. Coal tar is among the by-products obtained in the manufacture of coke. Coal tars are complex and variable mixtures of phenols, polycyclic aromatic hydrocarbons (PAHS), and heterocyclic compounds, about 200 substances in all.

 

  1. False

Explanation: Kerosene is a fossil fuel as it is obtained as one of the fractions of refining of petroleum.