Correct answer
C. Origin of coal
Explanation
The correct answer is Origin of coal.
Equal volumes of aniline and diesel oil when mixed at room temperature (during summer) was found to be completely miscible. It means that the aniline point of the diesel is ________ the room temperature?
Volatile matter content of metallurgical coke may be around ________ percent?
Ratio of inertial forces to surface tension forces is called the ________ number?
Three solid objects of the same material and of equal mass-a sphere, a cylinder (length = diameter) and a cube are at 500°C initially. These are dropped in a quenching bath containing a large volume of cooling oil each attaining the bath temperature eventually. The time required for 90% change in temperature is the smallest for________?
A liquid/gaseous fuel containing hydrocarbons and high amount of sulphur is burnt with 40% excess air. The flue gas still contains large amount of carbon monoxide. This may be due to the________?
A ________ employs a set of screen across a flow channel for the separation of dirt/rust from a flowing liquid stream?