A. As an illuminant
B. For metal cutting/welding
C. Both A. & B.
D. Neither A. nor B.
Related Mcqs:
- Main product in calcium carbide-water reaction is___________________?
A. Ca(OH)2
B. C2H2
C. CO2
D. CaCO3 - Commercial production of calcium carbide requires limestone and __________________ as raw materials?
A. Coke
B. Sand
C. Soda ash
D. Fuel oil - Coke used for the production of calcium carbide should have____________________?
A. Low ash content
B. Low ignition temperature
C. High electrical resistivity
D. All A , B. and C. - The temperature in the calcium carbide furnace is _______________ °C ?
A. 200-300
B. 700-850
C. 2000-2200
D. 4000-4500 - 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 - Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of_____________________?
A. Calcium sulphate
B. Sodium chloride
C. Sodium sulphate
D. Magnesium chloride - Silicon carbide is a/an_______________?
A. Adhesive
B. Abrasive
C. Type of glass
D. Brittle material - Addition of calcium oxide to water produces___________________?
A. Exothermic heat
B. Hissing sound
C. Slaked lime
D. All A , B. & C . - Magnesium and calcium ______________ cause temporary hardness of water ?
A. Carbonates
B. Bicarbonates
C. Phosphates
D. Sulphates - The product obtained on mixing calcium oxide with water is called __________________?
A. Quicklime
B. Slaked lime
C. Milk of lime
D. None of these
