A. Cryolite
B. Chalcopyrite
C. Rock phosphate
D. None of these
Related Mcqs:
- ________________ acid is an unsaturated fatty acid ?
A. Palmitic
B. Oleic
C. Stearic
D. Oxalic - Alcohol content in freshly prepared natural and fortified wine may be respectively around ______________ percent ?
A. 7-14 and 14-30
B. 7-14 and 40-50
C. 14 – 30 and 40-50
D. 10 – 20 and 40 – 50 - In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed ?
A. Furnace → converter → absorber
B. Furnace → evaporator → absorber
C. Furnace → converter → evaporator
D. Converter → furnace → absorber - Nitric acid is not used in the manufacture of______________________?
A. Detergents
B. Fertilisers
C. Aqua regia
D. Explosives - Laboratory glass wares which reacts with hydrofluoric acid, are made of the ______________ glass?
A. Lead
B. Borosilicate
C. Soda lime
D. Alkali silicate - Reaction of an alcohol with organic acid is called the ________________ reaction?
A. Saponification
B. Esterification
C. Neutralisation
D. Acidification - Sulphuric acid saturated with SO3 is called_________________?
A. Concentrated H2SO4
B. Sulphurous acid
C. Oleum
D. None of these - Nitro-glycerine absorbed in wood flour, sodium nitrate or ammonium nitrate is commercially used as controlled explosive called dynamite. The raw material used for its manufacture are glycerine, nitric acid and___________________?
A. Sulphuric acid
B. Phosphoric acid
C. Hydrochloric acid
D. Hydrofluoric acid - Hydrochloric acid is also known as_________________?
A. Oil of vitriol
B. Muriatic acid
C. Strong organic acid
D. Green acid - During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160°C, as_______________________?
A. It is very corrosive at elevated temperature
B. Its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be
further reduced)
C. It decomposes on further increasing the temperature
D. None of these
