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4

Penicillin is made employing __________ fermentation process.

A. Continuous

B. Aerobic batch

C. Anaerobic batch

D. None of these

Correct Answer :

B. Aerobic batch


Related Questions

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4

Permanent hardness of water can be removed by

A. Addition of soda ash to it

B. Treating it with zeolites

C. Passing it through sodium hexametaphosphate

D. All (A), (B), and (C)

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4

Laboratory glass wares which reacts with hydrofluoric acid, are made of the __________ glass.

A. Lead

B. Borosilicate

C. Soda lime

D. Alkali silicate

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4

10% oleum comprises of 10% free

A. SO2

B. H2SO3

C. SO3

D. H2SO4

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4

Diaphragm electrolytic cell as compared to mercury electrolytic cell

A. Produces 70% NaOH solution

B. Requires less specific power consumption for the production of chlorine

C. Requires lesser investment for similar capacity

D. All (A), (B) and (C)

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4

Bromides contained in hot mother liquor is treated with __________ during manufacture of bromine from sea water.

A. SO3

B. Cl2

C. NH3

D. SO2

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4

Liquor poisoning generally occurs due to the presence of __________ in it.

A. Ethyl alcohol

B. Impurities

C. Methyl alcohol

D. Carbonic acid

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4

Chrome tanning and vegetable tanning are done for

A. Light & heavy leather respectively

B. Heavy & light leather respectively

C. Both light & heavy leather

D. Neither light nor heavy leather

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4

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

A. Blue vitriol

B. Gypsum

C. Calcium silicate

D. Calcium sulphate

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4

Fusion of limestone and __________ produces high alumina cement.

A. Sand

B. Bauxite

C. Quicklime

D. Calcite

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4

Fumigant insecticides

A. Kill insects, when they eat it

B. Emit poisonous vapour

C. Are absorbed throughout the plant

D. None of these

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4

Black liquor is converted into white liquor by

A. Evaporation and burning the concentrate followed by causticisation of products

B. Multi-effect evaporation only

C. Selective liquid extraction

D. Extractive distillation

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4

Setting of plaster of Paris is accompanied with

A. Hydration

B. Dehydration

C. Hydrolysis

D. Loss of CO2

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4

Nickel is not used as a catalyst in the

A. Fischer-Tropsch process

B. Shift conversion

C. Hydrogenation of oil

D. Ostwald's process of HNO3 manufacture

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4

Most easily and cheaply available fibrous raw material for paper manufacture available in India is bamboo. The yield of pulp produced from fibrous raw material by mechanical process is about __________ percent.

A. 75

B. < 10

C. > 30

D. 50

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4

Pick out the true statement pertaining to water treatment.

A. Slow sand filters can remove colour completely

B. Activated carbon can be used for taste & odour control without subsequent filtration

C. Application of activated carbon reduces the temporary hardness of water

D. Normally, the turbidity is removed by adding a coagulant prior to sedimentation

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4

Solvent extracted oil

A. Has low free fatty acid content

B. Is odourless

C. Has more of unsaturates

D. None of these

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4

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

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4

Margarine is a/an

A. Fat

B. Explosive

C. Plasticiser

D. Rocket propellant

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4

Sucrose content in the raw juice extracted from sugar cane is about __________ percent.

A. 1 - 2

B. 15 - 20

C. 50 - 60

D. 80 - 85

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4

Which of the following is not a pyrite ore?

A. Celestite

B. Galena

C. Gypsum

D. Siderite

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4

Which of the following is the main constituent of the mother liquor produced in salt industry?

A. Quick lime

B. Glauber's salt

C. Salt petre

D. Bromine

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4

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)

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4

Molecular weight of plastics ranges from

A. 5000 to 10000

B. 20000 to 250000

C. 500 to 5000

D. 106 to 109

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4

Commercial production of calcium carbide requires limestone and __________ as raw materials.

A. Coke

B. Sand

C. Soda ash

D. Fuel oil

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4

In multistage equilibrium conversion of SO2 to SO3 (2SO2 + O2 2SO3), the reverse reaction becomes appreciable at a temperature of 550° C. The percentage equilibrium conversion of SO2 to SO3 can be increased by

A. Increasing the oxygen concentration

B. Putting more quantity of V2O5 catalyst in the converter

C. Removing some quantity of SO3 during intermediate stage

D. Maintaining low temperature & pressure in the converter

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4

Titanium dioxide is a/an __________ colour pigment.

A. White

B. Black

C. Yellow

D. Blue

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4

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. Poor oxidation stability and high gum forming tendency

B. Greater tendency of decomposition at elevated temperature

C. Hydrolysis tendency in presence of water

D. All (A), (B) and (C)

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4

Dacron is a

A. Condensation product of Hexamethylene diamine and adipic acid

B. Thermosetting material

C. Condensation product of dimethyl terephthalate and ethylene glycol

D. None of these

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4

Detergent is produced by the sulphonation of dodecyl benzene, which is an __________ reaction.

A. Endothermic

B. Exothermic

C. Irreversible

D. Both (B) and (C)

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4

Terylene is

A. Same as Dacron

B. A polyester

C. Both (A) & (B)

D. Neither (A) nor (B)