A. 500°C
B. 750°C
C. 1000°C
D. 1500°C
Related Mcqs:
- Calcination of limestone is not done in a ______________ kiln for producing lime ?
A. Vertical shaft
B. Rotary
C. Fluidised bed
D. Fixed bed - ______________________ of quicklime produces slaked lime ?
A. Hydration
B. Dehydration
C. Hydrogenation
D. None of these - Calcination of gypsum produces__________________?
A. Plaster of Paris
B. Salt cake
C. Nitre cake
D. Lime - 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 - Rotary kiln is not involved in the production of___________________?
A. Cement
B. Lime from limestone
C. Slaked lime from quick lime
D. None of these - Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at _____________ °C ?
A. 15-30
B. 90-100
C. 250-300
D. < 0 - In sulphate pulp manufacture, the pressure and temperature in the digestor is____________________?
A. 10 atm., 800 °C
B. 10 atm., 170-180°C
C. 1 atm., 170 – 180°C
D. 1 atm., 800°C - Salt is added in the kettle during soap manufacture to separate ___________________?
A. Soap from lye
B. Glycerine from lye
C. The metallic soap
D. The unsaponified fat from soap - Rosin soap is added during paper manufacture to____________________?
A. Impart adhesive properties
B. Improve opacity
C. Impart resistance to penetration by liquids
D. None of these - Co-efficient of thermal expansion of glass is decreased by the addition of _______________ during its manufacture?
A. CaO
B. MnO2
C. ZnO
D. FeS
