A. to dry the moisture of slurry
B. to decompose lime stone to unslaked lime
C. combination of different oxides like CaO SiO2 Fe2O3 and Al2O3
D. to reduce the impurities
Related Mcqs:
- How many zones through which the charge passes in a rotary kiln ?
A. 4
B. 3
C. 2
D. 5 - Cement is a mixture of so many compounds roasted in rotary kiln. Which substances has greater percentage ?
A. Lime (CaO)
B. Silica (SiO2)
C. Alumina (Al2O3)
D. Magnesia (MgO) - The sequence of zones in the rotary kiln are as____________________?
A. dry zone burning zone decomposition zone cooling zone
B. cooling zone burning zone decomposition zone dry zone
C. burning zone cooling zone decomposition zone
D. dry zone decomposition zone burning zone cooling zone - The composition of mixture of clay and lime stone in the raw for cement material is __________________?
A. 75% lime stone and 25% clay
B. 25% lime stone and 75% clay
C. 15% lime stone and 55% clay
D. 55% lime stone and 15% clay - The use of antifreeze in the automobile radiator is an important application of__________________?
A. constitutive property
B. additive property
C. colligative property
D. intrinsic property - Fruit juices and fizzy drinks such as lemonade are often sold in aluminium cans. What is the most important reason aluminium is a suitable metal ?
A. aluminium can be recycled
B. aluminium has very low density
C. aluminium is the most abundant metal in the earth crust
D. aluminium is resistant to corrosion by organic acids. - Which of the following points are important in connection with equilibrium constant ?
A. Kc is constant at given temperature
B. Kc is unaffected by change in concentration of reactants or products
C. Kc indicates the extent of reaction but not about the rate of reaction.
D. All of the above - The important monomers of acryclic resins is__________________?
A. Vinyl chloride
B. Styrene
C. Methylmethacrylate
D. Hexamethylenediamine - Silica gel and alumina are used as __________________?
A. Mobile phase
B. Stationary phase
C. Mixed phase
D. Single phase - Ethers show functional group isomerism with __________________?
A. aldehydes
B. ketones
C. alcohols
D. carboxylic acid
