Chemical Technology General Knowledge Quiz | Chemical Technology General Knowledge Multiple Choice Questions(MCQs) with Answers

Questions
61 Quicklime is
A Ca(OH)2
B CaCO3
C CaO
D NaOH

Answer: CaO
62 The temperature in the calcining zone of a vertical shaft kiln used in the manufacture of quicklime is about
A 400?C
B 275?C
C 550?C
D 1000?C

Answer: 1000?C
63 Which of the following reactions is an exothermic reaction?
A CaCO3(s) ? CaO(s) + CO2(g)
B CaO(s) + H2O(I) ? Ca(OH)2(s)
C 2NaHCO3 (s) ? Na2CO3(s) + CO2(g) + H2O(g)
D C(s) + O2 (g) ? CO2(g)

Answer: C(s) + O2 (g) ? CO2(g)
64 High alumina cement is manufactured by fusing
A limestone and slaked lime
B limestone and quick lime
C limestone and bauxite
D limestone and sand

Answer: limestone and bauxite
65 Portland cement is a finely ground
A calcium aluninates and silicates of varying compositions
B calcium aluminates and sodium silicates of varying compositions
C calcium aluminates and caustic soda
D calcium silicates and gypsum of fixed composition

Answer: calcium aluninates and silicates of varying compositions
66 Limestone is predominantly
A magnesium carbonate
B sodium carbonate
C calcium carbonate
D potassium carbonate

Answer: calcium carbonate
67 Glass industry requires soda ash with
A solids density 1.91 and bulk density 1.0
B solids density 1.86 and bulk density 0.6
C solids density 1.80 and bulk desity 0.58
D none of the above

Answer: solids density 1.91 and bulk density 1.0
68 The principal raw materials for the manufacture of soda ash by Solvay process are
A limestone and potassium chloride
B dolomite and sodium hydroxide
C limestone brine and coal
D coal and caustic soda

Answer: limestone brine and coal
69 Solvay process for the manufacture of soda ash
A can use low-grade brine
B requires less electric power than the modified Solvay process
C does not require NH3 plant investment
D all of the above

Answer: all of the above
70 Compared to mercury electrolytic cells diaphragm electrolytic cells
A consume less power per ton of chlorine produced
B require less initial investment for the same capacity
C can produce 70% NaOH solution
D uses saturated NaCI solution with solid NaCI make-up

Answer: require less initial investment for the same capacity
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