Heating of _______________ to 120°C, produces plaster of paris ?

Related Mcqs:

1. Setting of plaster of Paris is accompanied with___________________?

   A. Hydration
   B. Dehydration
   C. Hydrolysis
   D. Loss of CO2

2. Plaster of Paris is __________________?

   A. CaSO4.½H2O
   B. Used for setting of broken bones
   C. Both A. and B.
   D. Same as gypsum

3. Sulphur removal by heating of pyrite ore in presence of air is called its ____________________?

   A. Reduction
   B. Roasting
   C. Calcination
   D. Smelting

4. Oleum produces fumes of_____________________?

   A. SO2
   B. H2SO4
   C. SO3
   D. SO2 + H2SO4

5. Fusion of bauxite and ________________ produces high alumina cement?

   A. Alum
   B. Limestone
   C. Coke
   D. Quartz

6. 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

7. Mercury electrolytic cell produces 50-70% NaOH solution. Its operating temperature is ______________ °C?

   A. 25
   B. 60-70
   C. 150-200
   D. 250-300

8. Catalytic oxidation of naphthalene produces ?

   A. Styrene
   B. Phenol
   C. Phthalic anhydride
   D. None of these

9. Dehydrogenation of ethyl benzene produces __________________ ?

   A. Styrene
   B. Naphthalene
   C. Phenol
   D. Benzoic acid

10. Dehydrogenation of Isopropanol produces ____________________?

    A. Propyl alcohol
    B. Acetone
    C. Trichloroethylene
    D. Formaldehyde