In diesel oil, the number of carbon atoms per molecule is …………
a) C12 to C14
b) C12 to C16
c) C12 to C20
d) C14 to C25
The boiling point of lubricating oil is………
a) 300 to 400 0C
b) 225 to 300 0C
c) 150 to 200 0C
d) 40 to 130 0C
………is less volatile, less inflammable than petrol.
a) Kerosene
b) diesel oil
c) lubricating oil
d) both a & b
Diesel oil is used as a fuel in large vehicle such as …………..
a) trucks
b) trains
c) both a & b
d) cycle
………..is the breaking of the ores into small pieces with the help of crusher.
a) concentration
b) pulverization
c) roasting
d) smelting
When sodium bicarbonate is heated to get sodium carbonate, all are produced except..…
a) CO
b) CO2
c) Na2CO3
d) H2O
