A. Ca(OH)2
B. C2H2
C. CO2
D. CaCO3
Related Mcqs:
- 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. - 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 - The product obtained on mixing calcium oxide with water is called __________________?
A. Quicklime
B. Slaked lime
C. Milk of lime
D. None of these - 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 - Main constituents of Portland cement are calcium aluminate and__________________?
A. Gypsum
B. Silicates
C. Sodium silicate
D. Carbonates - 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
