For fractional distillation petroleum is heated above …………in a furnace.
a) 4000C
b) 2000C
c) 3000C
d) 6000C
Solvay process os used for the commercial preparation of…………
a) NH3
b) Na2CO3
c) (NH2)2CO
d) NaOH
Petroleum is also called………….
a) mineral oil
b) crude oil
c) liquid gold
d) all of these
Fire:-
Fire is a grouped of different classes. In order to control the fire it is considered important to know the class of fire because each class of fire requires different method to control.
Class A fire:-
Class A fire are those that involve ordinary materials such as …………
a) wood
b) rubber
c) cloth
d) all of these
We need to use a fire extinguisher with an “A” label on it, which is specially designed for ………..fire.
a) class A
b) class B
c) class C
d) class D
