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Chemical Process Online Exam Quiz

Important questions about Chemical Process. Chemical Process MCQ questions with answers. Chemical Process exam questions and answers for students and interviews.

Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its


A : a. poor oxidation stability and high gum forming tendency.

B : b. greater tendency of decomposition at elevated temperature.

C : c. hydrolysis tendency in presence of water.

D : d. all (a), (b) and (c).

Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because


A : a. its calorific value is very less.

B : b. tar neutralises the residual acids present in pitch.

C : c. it reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop.

D : d. all (a), (b) and (c).

Heating of __________ to 120°C, produces plaster of paris.


A : a. blue vitriol

B : b. gypsum

C : c. calcium silicate

D : d. calcium sulphate

Polymerisation product of C?F? (carbon tetraflouride) is called P.T.F.E (poly chloro tetra flouro ethylene). It is also called


A : a. polyurethane

B : b. silicone

C : c. teflon

D : d. epoxy resin

Transportation of 35% oleum during winter suffers from the problem of freezing, which can be overcome by the addition of small quantity of


A : a. nitric acid

B : b. hydrochloric acid

C : c. methyl alcohol

D : d. formic acid

Which of the following processes does not produce Cl? as a co-product during the manufacture of caustic soda ?


A : a. Diaphragm electrolytic cell process

B : b. Mercury electrolytic cell process

C : c. Lime-soda process

D : d. None of these

In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed :


A : a. furnace ? converter ? absorber

B : b. furnace ? evaporator ? absorber

C : c. furnace ? converter ? evaporator

D : d. converter ? furnace ? absorber

At a given temperature, the equilibrium yield of SO? obtained from the oxidation of SO? is proportional to (where, P = pressure of the system )


A : a. P

B : b. ?P

C : c. P²

D : d. 1/P

Commercial scale production of hydrogen from iron-steam reaction represented by, 3Fe + 3H?O = Fe?O? + 4H?, is not practised, as it is


A : a. a slow reaction.

B : b. a discontinuous reaction (requiring regeneration of iron by water gas intermittently).

C : c. still in development stage (by employing fluidised bed technique).

D : d. all (a), (b) and (c).

With increase in temperature, the equilibrium constant at constant pressure (Kp) for oxidation of sulphur dioxide


A : a. increases

B : b. increases linearly

C : c. decreases

D : d. decreases linearly

Out of the following processes of paper pulp manufacture, the maximum corrosion problem in digestion & handling equipments is encountered in the __________ process.


A : a. mechanical

B : b. sulphate/kraft

C : c. sulphite

D : d. neutral sulphite semi-chemical

Argon is the third largest constituent of air (followed by N? & O?). Its percentage by volume in air is


A : a. 0.14

B : b. 0.34

C : c. 0.94

D : d. 1.4

Vinyl chloride (CH? = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of


A : a. 4 kgf/cm² & 500°C.

B : b. 10 kgf/cm² & 1000°C.

C : c. 40 kg/cm² & 200°C.

D : d. 100 kg/cm² & 500°C.

In multistage equilibrium conversion of SO? to SO? (2SO? + O? ? 2SO?), the reverse reaction becomes appreciable at a temperature of 550° C. The percentage equilibrium conversion of SO? to SO? can be increased by


A : a. increasing the oxygen concentration.

B : b. putting more quantity of V?O? catalyst in the converter.

C : c. removing some quantity of SO? during intermediate stage.

D : d. maintaining low temperature & pressure in the converter.

CaSO? .1/2H?O is known as


A : a. blue vitriol

B : b. plaster of Paris

C : c. gypsum

D : d. zeolite

During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160°C, as


A : a. it is very corrosive at elevated temperature.

B : b. its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be further reduced).

C : c. it decomposes on further increasing the temperature.

D : d. none of these.

Solvay process is not used for the manufacture of potassium carbonate, because of the reason that potassium bicarbonate


A : a. is prone to thermal decomposition.

B : b. has high water solubility and is unstable.

C : c. is soluble in ammonium chloride and potassium chloride solution.

D : d. all (a), (b) and (c).

In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the


A : a. diamine and the ring.

B : b. dibasic acid and the ring.

C : c. diamine and the dibasic acid.

D : d. none of these.

During the absorption of HCl gas in water (to produce liquid HCl), the gas is kept above dew point to


A : a. increase the rate of absorption.

B : b. avoid corrosion.

C : c. reduce the cooling water circulation rate.

D : d. none of these.

The most popular and common detergent i.e., alkyl benzene sulfonate (ABS) is a/an __________ detergent.


A : a. cationic

B : b. anionic

C : c. amphoteric

D : d. semi polar

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