Froth floatation process in concentration of ore by ……………..
a) magnetically
b) wetting the ore
c) density
d) chemically
All are the raw materials for the manufacturing of soda ash except ………
a) ammonia
b) brain
c) lime stone
d) carbon-monoxide
Matte is a mixture of …………
a) Cu &FeS
b) Cu2S and FeS
c) Cu2O and FeS
d) Cu2O and FeO
The impurities present in mineral is called…
a) metal
b) ore
c) gangue
d) salt
All are the raw material for the manufacturing of urea except ……….
a) CO2
b) NH3
c) H2O
d) NaCl
Percentage of nitrogen in urea is ……….
a) 14
b) 28
c) 60
d) 46
