Chemical Process - Chemical Engineering Questions and Answers

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The ideal pulp for the manufacture of paper should have high __________ content.

cellulose

lignin

both (a) & (b)

none of these

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At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants.

independent of

directly proportional to

inversely proportional to

proportional to the square of

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Which of the following is a constituent of vinegar ?

Around 10% alcohol

Around 1% acetic acid

Both (a) and (b)

Neither (a) nor (b)

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

it is very corrosive at elevated temperature.

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

it decomposes on further increasing the temperature.

none of these.

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Kopper-Totzek coal gasifier

can give ammonia synthesis gas (H₂ + N₂).

is a moving bed reactor.

cannot use coking coal.

operate at very high pressure.

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Addition of calcium oxide to water produces

exothermic heat

hissing sound

slaked lime

all (a), (b) & (c)

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Sodium bisulphite is used for __________ water.

deaeration

dechlorination

both (a) & (b)

neither (a) nor(b)

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Riboflavin is a/an

vitamin

analgesic drug

anaesthetics

anti-malarial drug

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Flash point of most vegetable oils is about __________ °C.

100

200

300