Chemical technology MCQs, chemical technology quiz questions and answers. Free chemical technology quiz online for educational purposes. A collection of chemistry MCQs on chemical technology. Browse our collection of general science MCQs to improve your general science knowledge.
Chemical Technology MCQs and Answers
1. The form of sulphur which is the most stable at ordinary temperature is
(A) Monoclinic
(B) Plastic
(C) Rhombic
(D) Flowers of sulphur
Answer: Rhombic
2. The allotrope of sulphur which is insoluble in carbon disulphide is
(A) monoclinic suphur
(B) rhombic sulphur
(C) milk of sulphur
(D) plastic sulphur
Answer: plastic sulphur
3. Oleum is
(A) a misture of conc. H2SO4 and oil
(B) sulphuric acid which gives fumes of sulphur dioxide
(C) sulphuric acid saturated with sulphur trioxide
(D) a mixture of sulphuric and nitric acid.
Answer: sulphuric acid saturated with sulphur trioxide
4. Oleum may be represented by the formula
(A) H2SO4
(B) H2SO3
(C) H2S2O6
(D) H2S2O7
Answer: H2S2O7
(A) H2SO4
(B) H2O+SO2
(C) SO2
(D) SO3
Answer: SO3
6. Which of the following has maximum specific gravity at 18C?
(A) 98.5% H2SO4
(B) 20% oleum
(C) 40% oleum
(D) 65% eloum
Answer: 65% eloum
7. H2S from petroleum refinery streams is recovered by scrubbing with
(A) ethanol
(B) ethabol amines
(C) water
(D) 98.5% H2SO4
Answer: ethabol amines
8. Sulphur is produced by oxidation-reduction of H2S. The catalyst used in this process is
(A) V2O5
(B) AI2O3
(C) Pt
(D) Ni
Answer: AI2O3
9. When sulphur dioxide is passed through a solution of hydrogen sulphide in water
(A) sulphuric acid is formed in solution
(B) sulphurous acid is formed in solution
(C) sulphur is precipitated
(D) no change is observed
Answer: sulphur is precipitated
10. Sulphuric acid produced by contact process is
(A) Cheaper
(B) pure and concentrated
(C) of poor quality
(D) very dilute
Answer: pure and concentrated
(A) is relatively immune to poisons
(B) requires low initial investment and 5% replacement per year
(C) requires low O2/SO2 to give economic conversion
(D) requires dilute SO2 input (7-10%)
Answer: requires low O2/SO2 to give economic conversion
12. The catalyst used in the manufacture of sulphuric acid by contact process is
(A) iron
(B) aluminium oxide
(C) nickel
(D) vanadium pentoxide
Answer: vanadium pentoxide
(A) easy poisoning
(B) fragility
(C) high initial investment
(D) all of these answers
Answer: all of these answers
14. Poison for platinum catalyst is
(A) sulphuric acid is formed in solution
(B) phosphorous
(C) arsenic
(D) coke
Answer: arsenic
(A) low temperature high pressure
(B) low temperature low pressure
(C) high temperature high pressure
(D) temperature low pressure
Answer: low temperature high pressure
(A) square root of system pressure at a given temperature
(B) cube root of system pressure at a given temperature
(C) square of system pressure at a given temperature
(D) cube of system pressure at a given temperature
Answer: square root of system pressure at a given temperature
17. Equilibrium constant (Kp) at constant pressure for sulphur dioxide oxidation
(A) increases with increase in temperature
(B) decreases with increase in temperature
(C) remains unaffected with change in temperature
(D) decreases linearly with increase in temperature
Answer: decreases with increase in temperature
(A) less than 80%
(B) 98%
(C) 100%
(D) 95%
Answer: less than 80%
19. Contact process for the manufacture of sulphuric acid yields
(A) 80% H2SO4 only
(B) 98% H2SO4 and higher
(C) 95% H2SO4 only
(D) 90% H2SO4 only
Answer: 98% H2SO4 and higher
20. 65% oleum
(A) is prepared by distilling 20% oleum
(B) is prepared by chamber process
(C) does not contain free SO3
(D) contains 0.65% free SO3
Answer: is prepared by distilling 20% oleum
21. The most efficient agent for the absorption of SO3 is
(A) 80% H2SO4
(B) 98.5% H2SO4
(C) 90% H2SO4
(D) 20% oleum
Answer: 98.5% H2SO4
22. Which one of the following reactions is not an exothermic
(A) Absorption of sulphur troixide by 98.5% sulphuric acid
(B) Oxidation of sulphur trioxide
(C) Oxidation of sulphur to sulphur dioxide
(D) Thermal dissociation of iron pyrites
Answer: Thermal dissociation of iron pyrites
23. Producer gas is obtained by
(A) thermal cracking of naphtha
(B) passing steam and air through red hot coke
(C) passing air through red hot coke
(D) passing steam through red hot coke
Answer: Thermal dissociation of iron pyrites
24. The constituents of water gas are
(A) CO and H2O
(B) CO2 and N2
(C) CO and H2
(D) CO and N2
Answer: CO and H2
25. The producer gas is composed of
(A) CO and CO2
(B) CH4 and CO2
(C) CH4 and C2H4
(D) CO N2 and H2
Answer: CO N2 and H2