Chemical Engineering Mcqs

Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about ______________ °C ?

(A) -83
(B) -183
(C) -196
(D) -218

Submitted By :Ali Uppal

The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is _________________?

(A) Dilute H2SO4
(B) Oleum
(C) Ultraviolet light
(D) None of these

Submitted By :Ali Uppal

Pure rectified spirit contains about _________________ percent alcohol?

(A) 45
(B) 70
(C) 95
(D) 99.5

Submitted By :Ali Uppal

Styrene is produced from ethyl benzene by the process of________________?

(A) Dehydrogenation
(B) Oxidation
(C) Alkylation
(D) Dehydration

Submitted By :Ali Uppal

White phosphorous is stored under water, because __________________?

(A) It does not react with water
(B) It is poisonous
(C) Its kindling temperature in dry air is very low
(D) It is unstable

Submitted By :Ali Uppal

Paper pulp produced by Kraft/sulphate process is__________________ ?

(A) Bleached easily
(B) Dull white in color
(C) Strong fibrous
(D) Dark colored

Submitted By :Ali Uppal

Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at _____________ °C ?

(A) 15-30
(B) 90-100
(C) 250-300
(D) < 0

Submitted By :Ali Uppal

Oxidation of SO2 to SO3 is favoured by______________________?

(A) Low temperature and low pressure
(B) Low temperature and high pressure
(C) High temperature and low pressure
(D) High temperature and high pressure

Submitted By :Ali Uppal

Which of the following contains least amount of N2 ?

(A) Coke oven gas
(B) Blast furnace gas
(C) Producer gas
(D) Water gas (blue gas)

Submitted By :Ali Uppal

Which of the following is not responsible for causing permanent hardness of water ?

(A) Ca(HCO3)2
(B) CaCl2
(C) MgCl2
(D) None of these

Submitted By :Ali Uppal

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