Petrol and diesel are obtained from a natural resources called
Sun
Petroleum
Coal tar
Coal gas
Fly ash is produced from?
Natural gas
Coal
All the above
Petroleum is mixture of?
Petrol
Diesel
Lubricating oil
All of these
Coal is formed by the process of?
Carbonisation
Distillation
Vaporisation
Evaporation
In destructive distillation, coal is heated strongly to about:
5000oc
1000oc
100oc
10,000oc
In the oil wells,natural gas forms the top most layer, followed by oil and finally water.This is because,
Oil and gas are heavier than water
Oil and gas are lighter than water
Oil and gas stick to each other
None of these
The characteristic of coal is?
Tough
Black in colour
Porous
Which one of the following is a renewable resource?
Air
Gobar gas produced from animal and plant waste contains?
Ethane
Methane
Propane
Select the quality that a good fuel should possess.
High calorific value
A low calorific value
It should burn too fast
It should burn too slow
