Chemical Technology General Knowledge Quiz | Chemical Technology General Knowledge Objective Type Questions & Answers

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Questions
21 Select the correct statement
A Electrolysis cell uses exothermic reactions to produce electrical energy
B In the electrolysis cell the positive current flows from the positive electrode to the negative electrode outside the cell
C Electrolysis cell uses electrical energy to produce endothermic chemical changes
D In the electrolysis cell the positive current flows from the negative electrode to the positive electrode inside the cell

Answer: Electrolysis cell uses electrical energy to produce endothermic chemical changes
22 The flow of current is actually flow of
A ?-particles
B ?-particles
C ? -praticles
D mesons

Answer: ?-particles
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23 The degree of ionisation does not depend upon
A nature of solvent
B nature of solute
C temperature
D current strength

Answer: current strength
24 When the same quantity of electricity is passed through different solutions the amounts of different substances produced are proportional to
A their atomic weight
B their molecular weight
C their equivalent weight
D the square of their equivalent weight

Answer: their equivalent weight
25 The quantity of electricity required to deposit one gram equivalent of any substance is
A one coulomb
B one faraday
C one ampere
D one microfaraday

Answer: one faraday
26 The percentage by volume of argon in the air is about
A 2.97%
B 0.94%
C 0.01%
D 0.00%

Answer: 0.94%
27 Nitrogen gas is used
A as protective atmosphere to prevent oxidation in metal working and food preservation
B for welding
C for cutting of metals
D as refrigerant

Answer: as protective atmosphere to prevent oxidation in metal working and food preservation
28 High purity oxygen is used for
A welding
B cutting of metals
C medicinal purposes
D all of the above

Answer: all of the above
29 The liquefaction of gases in general is favoured at
A low temperature and low pressure
B low temperature and high pressure
C high temperature and high pressure
D high temperature and low pressure

Answer: low temperature and high pressure
30 The raw materials for the manufacature of calcium carbide are
A limestone and coke
B limestone and slaked lime
C limestone and sand
D limestone and caustic soda

Answer: limestone and coke
31 Acetylene is manufactured by
A reacting calcium carbide with liquid water
B Sachsse process
C Wulff process
D all of these ansers

Answer: all of these ansers
32 Which of the following reactions is an exothermic reaction?
A CaO(s) + 3C(s) ?CaC2 + CO(g)
B CaCO3(s) ? CaO(s) + CO2(g)
C CaC2(s) + H2O(I) ? Ca(OH)2 + C2H2(g)
D C(s) + CO2(g) ?2CO(g)

Answer: CaC2(s) + H2O(I) ? Ca(OH)2 + C2H2(g)
33 Which of the following reactions is an endothermic reaction?
A C(s) + O2(g) ?CO2(g)
B 2C(s) + O2(g) ?2CO(g)
C C(s) + H2O(I) ?CO(g) + H2(g)
D CO(g) + 3H2(g) ?CH4(g) + H2O(g)

Answer: C(s) + H2O(I) ?CO(g) + H2(g)
34 The producer gas is mainly used in
A petroleum refinery
B fertilizer industry
C steel industry
D pharmaceutical industry

Answer: steel industry
35 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
36 Coke oven gas is composed of
A CH4 CO2 and H2O
B CO CH4 and N2
C CO2 CO AND H2
D H CO and CH2

Answer: H CO and CH2
37 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
38 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: passing air through red hot coke
39 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
40 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

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