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Free download in PDF Chemical Technology General Knowledge Multiple Choice Questions(MCQs) & Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(1)
65% oleum
[A]
is prepared by distilling 20% oleum
[B]
is prespared by chamber process
[C]
does not contain free SO3
[D]
contains 0.65% free SO3
Answer: is prepared by distilling 20% oleum
(2)
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
(3)
For the production of sulphuric acid chamber process was developed first but produced acid of concentration
[A]
less than 80%
[B]
98%
[C]
100%
[D]
95%
(4)
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
(5)
The equilibrium yield of sulphur trioxide obtained from the oxidation of sulphur dioxide can be increased by
[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
(6)
The most favourable conditions of temperature and pressure for the oxidation of sulphur dioxide to sulphur trioxide are
[A]
low temperature high pressure
[B]
low temperature low pressure
[C]
high temperature high pressure
[D]
high temperature low pressure
Answer: low temperature high pressure
(7)
Poison for platinum catalyst is
[A]
sulphuric acid is formed in solution
[B]
phosphorous
[C]
arsenic
[D]
coke
(8)
In the manufacture of sulphuric acid by contact process platinum catalyst was previously used but suffers from
[A]
easy poisoning
[B]
fragility
[C]
high initial investment
[D]
all of these answers
Answer: all of these answers
(9)
The catalyst used in the manufacture of sulphuric acid by contact process is
[A]
iron
[B]
aluminium oxid
[C]
nickel
[D]
vanadium pentoxide
Answer: vanadium pentoxide
(10)
Select the wrong statement. Compared to platinum catalyst vanadium pentoxide catalyst used in contact process for the manufacture of H2SO4
[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
(11)
Sulphuric acid produced by contact process is
[A]
cheaper
[B]
pure and concentrated
[C]
of poor quality
[D]
very dilute
Answer: pure and concentrated
(12)
When sulphur dioxide is passed through a golution 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
(13)
Sulphur is produced by oxidation-reduction of H2S. The catalyst used in this process is
[A]
V2O5
[B]
AI2O3
[C]
Pt
[D]
Ni
(14)
H2S from petroleum refinery streams is recovered by scrubbing with
[A]
ethanol
[B]
ethabol amines
[C]
water
[D]
98.5% H2SO4
(15)
Which of the following has maximum specific gravity at 18?C?
[A]
98.5% H2SO4
[B]
20% oleum
[C]
40% oleum
[D]
65% eloum
(16)
Oleum gives fumes of
[A]
H2SO4
[B]
H2O+SO2
[C]
SO2
[D]
SO3
(17)
Oleum may be rephrsented by the formula
[A]
H2SO4
[B]
H2SO3
[C]
H2S2O6
[D]
H2S2O7
(18)
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
(19)
The allotrope of sulphur which is insoluble in carbon disulphide is
[A]
monoclinic suphur
[B]
rhombic sulphur
[C]
milk of sulphur
[D]
plastic sulphur
(20)
The form of sulphur which is the most stable at ordinary temperature is
[A]
Monoclinic
[B]
plastic
[C]
rhombic
[D]
flowers of sulphur
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