Plastic is prepared from petroleum by the process called ……….
a) monomer
b) polymer
c) polymerization
d) hydrogenation
In ghee industry, vegetable oil is converted into solid fat by a process called……
a) conversion
b) recycle
c) polymerization
d) hydrogenation
The process of hydrogenation takes place in the presence of nickel element at……….
a) 200-250oC
b) 250-300oC
c) 300-350oC
d) 350-400oC
During hydrogenation process vegetable oil changes into soap, the process is called………
a) saponification
b) suspicion
c) rumination
d) none of these
Burning a match stick is an example of a…….
a) physical change
b) chemical change
c) change in pressure
d) change of color
Which one is a physical change?
a) frying an egg
b) breaking a wooden stick
c) burning of candle
d) toasting bread
