A. Exothermic heat
B. Hissing sound
C. Slaked lime
D. All A , B. & C .
Related Mcqs:
- The product obtained on mixing calcium oxide with water is called __________________?
A. Quicklime
B. Slaked lime
C. Milk of lime
D. None of these - Coloured glass is obtained by mixing of colored salts. Addition of ___________________ oxide is done to impart greenish blue color to the glass?
A. Chromium
B. Arsenic
C. Copper
D. Manganese - Thermal pyrolysis of ethylene dichloride produces___________________?
A. Trichloroethylene
B. Vinyl chloride
C. Ethanol amine
D. Ethylene oxide - 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 - 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. - Main product in calcium carbide-water reaction is___________________?
A. Ca(OH)2
B. C2H2
C. CO2
D. CaCO3 - Magnesium and calcium ______________ cause temporary hardness of water ?
A. Carbonates
B. Bicarbonates
C. Phosphates
D. Sulphates - Permanent hardness of water is due to the presence of calcium & magnesium __________________?
A. Bi-carbonates
B. Sulphates & chlorides
C. Carbonate
D. None of these - Which catalyst is used in the manufacture of ethylene oxide by oxidation of ethylene ?
A. AgO
B. Al2O3
C. ZnCl2
D. Fe2O3 - Basic oxide is absent in ___________________ glass?
A. Flint
B. Pyrex
C. Quartz
D. All A, B. & C
