Related Questions

Addition of calcium oxide to water produces
A Exothermic heat
B Hissing sound
C Slaked lime
D All of the above
The product obtained on mixing calcium oxide with water is called
A Quicklime
B Slaked lime
C Milk of lime
D None of these
Quick lime (or caustic lime)
A Is obtained by the calcination of pure lime stone
B Has great affinity to moisture
C Is amorphous
D All the above
Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of portland cement. The component of Portland cement which first hardens is
A 5CaO . 3Al2O3
B 3CaO . Al2O3
C 3CaO . SiO2
D 2CaO . SiO2
Which metal oxide is an amphoteric oxide?
A iron
B aluminium
C sodium
D potassium
নিম্নের কোন oxide টিকে উভধর্মী oxide বলে?
A CaO
B MgO
C ZnO
D CuO
Solution X contains 40% salt and 60% water by weights, Solution Y contains 25% salt and 75% water. If a mixture of X and Y contains 30% salt. What percent of the weight of this mixture is solution X?
A 10%
B 33.3%
C 40%
D 42.5%
A sink contains exactly 12 liters of water. If water is drained from the sink until it holds exactly 6 liters of water less than the quantity of water drained away, how many liters of water were drained away ?
A 2
B 3
C 9
D 6
A milk vendor has 2 cans of milk. The first contains 25% water and the rest milk. The second contains 50% water. How much milk should he mix from each of the containers so as to get 12 litres of milk such that the ratio of water to milk is 3 : 5?
A 4 litres, 8 litres
B 6 litres, 6 litres
C 5 litres, 7 litres
D 7 litres, 5 litres
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

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