Coke used for the production of calcium carbide should have____________________?

Related Mcqs:

1. Commercial production of calcium carbide requires limestone and __________________ as raw materials?

   A. Coke
   B. Sand
   C. Soda ash
   D. Fuel oil

2. Reaction of calcium carbide with water produces a gas, which is used_________________?

   A. As an illuminant
   B. For metal cutting/welding
   C. Both A. & B.
   D. Neither A. nor B.

3. Main product in calcium carbide-water reaction is___________________?

   A. Ca(OH)2
   B. C2H2
   C. CO2
   D. CaCO3

4. The temperature in the calcium carbide furnace is _______________ °C ?

   A. 200-300
   B. 700-850
   C. 2000-2200
   D. 4000-4500

5. Silicon carbide is a/an_______________?

   A. Adhesive
   B. Abrasive
   C. Type of glass
   D. Brittle material

6. Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used_______________________?

   A. As a lubricant
   B. As a rust preventive
   C. In hard water for cleaning of cloth
   D. As a foam depressant in distillation column

7. Finely ground calcium aluminate & silicate is a/an ____________________?

   A. Cermet
   B. Cement
   C. Abrasive
   D. Explosive

8. Addition of calcium oxide to water produces___________________?

   A. Exothermic heat
   B. Hissing sound
   C. Slaked lime
   D. All A , B. & C .

9. Magnesium and calcium ______________ cause temporary hardness of water ?

   A. Carbonates
   B. Bicarbonates
   C. Phosphates
   D. Sulphates

10. Main constituents of Portland cement are calcium aluminate and__________________?

    A. Gypsum
    B. Silicates
    C. Sodium silicate
    D. Carbonates